0000950170-24-050701 | 10-Q | XBRL Viewer

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 18.6	$ 38.3
Pension Plan and Restoration of Retirement Income Plan:
Amortization of prior service cost, net of tax of $0.1 and $0.0, respectively	0.0	0.1
Amortization of deferred net loss, net of tax of $0.0 and $0.1, respectively	0.1	0.2
Regulatory classification of certain pension costs, net of tax of $1.2 and $0.0, respectively	3.9	0.0
Settlement cost, net of tax of $0.0 and $0.2, respectively	0.0	0.9
Postretirement benefit plans:
Amortization of deferred net gain, net of tax of $0.0 and $0.0, respectively	(0.1)	(0.1)
Other comprehensive income, net of tax	3.9	1.1
Comprehensive income	$ 22.5	$ 39.4

Revenue Recognition

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Revenue Recognition

3. Revenue Recognition

The following table presents OG&E's revenues from contracts with customers disaggregated by customer classification. OG&E's operating revenues disaggregated by customer classification can be found in "OG&E (Electric Company) Results of Operations" within "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations."


	Three Months Ended March 31,
(In millions)	2024		2023
Residential	$	221.4	$	205.5
Commercial		148.8		132.3
Industrial		53.0		53.3
Oilfield		49.7		48.1
Public authorities and street light		51.0		45.1
System sales revenues		523.9		484.3
Provision for tax refund		—		1.4
Integrated market		15.0		12.7
Transmission		35.6		35.2
Other		8.1		11.0
Revenues from contracts with customers	$	582.6	$	544.6

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-9

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-URI https://asc.fasb.org//1943274/2147479806/606-10-50-10

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147479806/606-10-50-12

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-Topic 606
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
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-URI https://asc.fasb.org//606/tableOfContent

+ Details

Commitments and Contingencies (Details) $ in Millions	1 Months Ended
Commitments and Contingencies (Details) $ in Millions	Jul. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Damages sought, description	In July 2023, OG&E was named, along with its contractor, as a defendant in a lawsuit filed by an apartment owner and its insurance companies seeking in excess of $60.0 million in damages related to a fire at an apartment building under construction in Oklahoma City. Several additional defendants have also been named. OG&E disputes the claims in the lawsuit and intends to vigorously defend this action. If OG&E was ultimately deemed liable for damages in connection with this incident, OG&E believes its existing insurance policies will cover its costs, in excess of a required retention (the amount of which is not material), to satisfy any liability it may have. Due to the uncertain and preliminary nature of this litigation, the outcome cannot be predicted, and OG&E is unable to provide a range of possible loss in this matter.
Damage from Fire [Member]
Loss Contingencies [Line Items]
Damages sought	$ 60.0

Long-Term Debt

3 Months Ended

Mar. 31, 2024

Long-Term Debt, Unclassified [Abstract]

Long-Term Debt

8. Long-Term Debt

At March 31, 2024, the Registrants were in compliance with all of their debt agreements.

OGE Energy has a $100.0 million floating rate unsecured three-year credit agreement, of which $50.0 million is considered a revolving loan and $50.0 million is considered a term loan. During the three months ended March 31, 2024, the interest rate for the $50.0 million drawn on the term loan under this credit agreement was 6.375 percent. For additional information related to this credit agreement, see Note 9.

OG&E Industrial Authority Bonds

OG&E has tax-exempt pollution control bonds with optional redemption provisions that allow the holders to request repayment of the bonds on any business day. The following table presents information about these bonds, which can be tendered at the option of the holder during the next 12 months.


Series			Date Due	Amount
				(In millions)
2.15%	-	4.85%	Garfield Industrial Authority, January 1, 2025	$	47.0
1.90%	-	4.75%	Muskogee Industrial Authority, January 1, 2025		32.4
2.15%	-	4.85%	Muskogee Industrial Authority, June 1, 2027		56.0
Total (redeemable during next 12 months)				$	135.4

All of these bonds are subject to an optional tender at the request of the holders, at 100 percent of the principal amount, together with accrued and unpaid interest to the date of purchase. The bond holders, on any business day, can request repayment of the bond by delivering an irrevocable notice to the tender agent stating the principal amount of the bond, payment instructions for the purchase price and the business day the bond is to be purchased. The repayment option may only be exercised by the holder of a bond for the principal amount. When a tender notice has been received by the trustee, a third-party remarketing agent for the bonds will attempt to remarket any bonds tendered for purchase. This process occurs once per week. Since the original issuance of these series of bonds in 1995 and 1997, the remarketing agent has successfully remarketed all tendered bonds. If the remarketing agent is unable to remarket any such bonds, OG&E is obligated to repurchase such unremarketed bonds. As OG&E has both the intent and ability to refinance the bonds on a long-term basis and such ability is supported by an ability to consummate the refinancing, the bonds are classified as Long-Term Debt or Long-Term Debt Due within One Year, as appropriate, in the condensed balance sheets. OG&E believes that it has sufficient liquidity to meet these obligations.

Retirement Plans and Postretirement Benefit Plans - Additional Information (Details) $ in Millions	Feb. 29, 2024 USD ($)
Retirement Plans and Postretirement Benefit Plans [Abstract]
Employer expected contribution	$ 10.0

Rate Matters and Regulation - Additional Information (Details) $ in Millions		1 Months Ended	12 Months Ended
	Dec. 29, 2023 USD ($)	Oct. 31, 2023 USD ($)	Dec. 31, 2028 Megawattsday	Dec. 31, 2027 Megawattsday	Dec. 31, 2026 Megawattsday	Mar. 31, 2024 USD ($)
Estimated Refund to SPP						$ 13.0
Requested Recovery of Capital Investment	$ 1,300.0
Arkansas Public Service Commission [Member]
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 3.5
Integrated Resource Plans [Member] \| Forecast [Member]
Energy generation capacity \| Megawattsday			1,096	431	556
OKLAHOMA [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 332.5
Public Utilities, Requested Return on Equity, Percentage	10.50%
Common Equity Percentage which ROE is based	53.50%
Impact to Company [Member]
Estimated Refund to SPP						5.0
Customer Impact [Member]
Estimated Refund to SPP						$ 8.0

Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2024

Revenues from Contract with Customers [Abstract]

Disaggregation of Revenue


	Three Months Ended March 31,
(In millions)	2024		2023
Residential	$	221.4	$	205.5
Commercial		148.8		132.3
Industrial		53.0		53.3
Oilfield		49.7		48.1
Public authorities and street light		51.0		45.1
System sales revenues		523.9		484.3
Provision for tax refund		—		1.4
Integrated market		15.0		12.7
Transmission		35.6		35.2
Other		8.1		11.0
Revenues from contracts with customers	$	582.6	$	544.6

Retirement Plans and Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2024

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The following tables present the net periodic benefit cost components, before consideration of capitalized amounts, of OGE Energy's Pension Plan, Restoration of Retirement Income Plan and postretirement benefit plans that are included in the condensed financial statements. Service cost is presented within Other Operation and Maintenance Expense, and the remaining net periodic benefit cost components as listed in the following tables are presented within Other Net Periodic Benefit Income in the statements of income. OG&E recovers specific amounts of pension and postretirement medical costs in rates approved in its Oklahoma rate reviews. In accordance with approved orders, OG&E defers the difference between actual pension and postretirement medical expenses and the amount approved in its last Oklahoma rate review as a regulatory asset or regulatory liability. These amounts have been recorded

in the Pension tracker in the regulatory assets and liabilities table in Note 1 and within Other Net Periodic Benefit Income in the statements of income.


	Pension Plan						Restoration of Retirement Income Plan
	Three Months Ended						Three Months Ended
OGE Energy	March 31,						March 31,
(In millions)	2024			2023			2024		2023
Service cost	$	1.4		$	1.4		$	0.2	$	0.3
Interest cost		3.8			4.0			0.1		—
Expected return on plan assets		(3.7	)		(4.0	)		—		—
Amortization of net loss		1.7			2.2			—		—
Amortization of unrecognized prior service cost (A)		—			—			0.1		0.1
Settlement cost		—			18.2			—		—
Net periodic benefit cost	$	3.2		$	21.8		$	0.4	$	0.4

(A)

Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment.


	Pension Plan						Restoration of Retirement Income Plan
	Three Months Ended						Three Months Ended
OG&E	March 31,						March 31,
(In millions)	2024			2023			2024		2023
Service cost	$	1.4		$	1.1		$	—	$	—
Interest cost		3.3			3.1			—		—
Expected return on plan assets		(3.2	)		(3.2	)		—		—
Amortization of net loss		1.6			1.9			—		—
Settlement cost		—			17.2			—		—
Total net periodic benefit cost		3.1			20.1			—		—
Plus: Amount allocated from OGE Energy		—			1.6			0.4		0.4
Net periodic benefit cost	$	3.1		$	21.7		$	0.4	$	0.4

In addition to the net periodic benefit cost amounts recognized, as presented in the tables above, for the Pension and Restoration of Retirement Income Plans during the three months ended March 31, 2024 and 2023, the Registrants recognized the following:


	Three Months Ended
	March 31,
(In millions)	2024		2023
Change in pension expense to maintain allowed recoverable amount in Oklahoma jurisdiction (A)	$	3.3	$	20.2
Deferral of pension expense related to pension settlement charges included in the above line item:
Oklahoma jurisdiction (A)	$	—	$	16.7
Arkansas jurisdiction (A)	$	—	$	1.5

(A)

Included in the pension regulatory asset in each jurisdiction, as indicated in the regulatory assets and liabilities table in Note 1.


	OGE Energy						OG&E
	Postretirement Benefit Plans						Postretirement Benefit Plans
	Three Months Ended						Three Months Ended
	March 31,						March 31,
(In millions)	2024			2023			2024			2023
Service cost	$	—		$	—		$	—		$	—
Interest cost		1.3			1.3			1.0			1.0
Expected return on plan assets		(0.4	)		(0.4	)		(0.4	)		(0.4	)
Amortization of net gain		(0.1	)		(0.1	)		—			—
Total net periodic benefit cost		0.8			0.8			0.6			0.6
Plus: Amount allocated from OGE Energy		—			—			0.1			0.1
Net periodic benefit cost	$	0.8		$	0.8		$	0.7		$	0.7

In addition to the net periodic benefit cost amounts recognized, as presented in the table above, for the postretirement benefit plans during the three months ended March 31, 2024 and 2023, the Registrants recognized the following:


	Three Months Ended
	March 31,
(In millions)	2024		2023
Change in postretirement expense to maintain allowed recoverable amount in Oklahoma jurisdiction (A)	$	1.1	$	1.1

(A)

Included in the pension regulatory asset, as indicated in the regulatory assets and liabilities table in Note 1.

Schedule of Capitalized Pension and Postretirement Cost [Table Text Block]

The following table presents the amount of net periodic benefit cost capitalized and attributable to each of the Registrants for OGE Energy's Pension Plan and postretirement benefit plans for the three months ended March 31, 2024 and 2023.


	OGE Energy				OG&E
	Three Months Ended				Three Months Ended
	March 31,				March 31,
(In millions)	2024		2023		2024		2023
Capitalized portion of net periodic pension benefit cost	$	—	$	0.6	$	0.6	$	0.5
Capitalized portion of net periodic postretirement benefit cost	$	—	$	—	$	—	$	—

Pension Plan Funding

In February 2024, OGE Energy made a $10.0 million contribution to its Pension Plan related to OG&E employees and has not determined whether it will need to make any additional contributions to the Pension Plan in 2024. The Registrants could be required to make additional contributions if the value of its pension trust and postretirement benefit plan trust assets are adversely impacted by a major market disruption in the future.

Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2024

Long-Term Debt, Unclassified [Abstract]

Schedule of Long-term Debt Instruments

The following table presents information about these bonds, which can be tendered at the option of the holder during the next 12 months.


Series			Date Due	Amount
				(In millions)
2.15%	-	4.85%	Garfield Industrial Authority, January 1, 2025	$	47.0
1.90%	-	4.75%	Muskogee Industrial Authority, January 1, 2025		32.4
2.15%	-	4.85%	Muskogee Industrial Authority, June 1, 2027		56.0
Total (redeemable during next 12 months)				$	135.4

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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+ Details

Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended
Revenue Recognition (Details) - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 582.6	$ 544.6
Provision for Rate Refund
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0.0	1.4
Integrated Market
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	15.0	12.7
Transmission
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	35.6	35.2
Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	8.1	11.0
Residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	221.4	205.5
Commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	148.8	132.3
Industrial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	53.0	53.3
Oilfield
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	49.7	48.1
Public Authority and Street Light
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	51.0	45.1
System Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 523.9	$ 484.3

Common Equity

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Common Equity

7. Common Equity

Automatic Dividend Reinvestment and Stock Purchase Plan

OGE Energy issued 4,900 new shares of common stock under its Automatic Dividend Reinvestment and Stock Purchase Plan during the three months ended March 31, 2024 and received proceeds of $0.2 million. OGE Energy may, from time to time, issue additional shares under its Automatic Dividend Reinvestment and Stock Purchase Plan to fund capital requirements or working capital needs. As of March 31, 2024, there were 4,797,244 shares of unissued common stock reserved for issuance under OGE Energy's Automatic Dividend Reinvestment and Stock Purchase Plan.

Earnings Per Share

Basic earnings per share is calculated by dividing net income attributable to OGE Energy by the weighted-average number of OGE Energy's common shares outstanding during the period. In the calculation of diluted earnings per share, weighted-average shares outstanding are increased for additional shares that would be outstanding if potentially dilutive securities were converted to common stock. Potentially dilutive securities for OGE Energy consist of performance units and restricted stock units. The following table presents the calculation of basic and diluted earnings per share for OGE Energy.


	Three Months Ended
	March 31,
(In millions, except per share data)	2024		2023
Net income	$	18.6	$	38.3
Average common shares outstanding:
Basic average common shares outstanding		200.4		200.2
Effect of dilutive securities:
Contingently issuable shares (performance and restricted stock units)		0.2		0.6
Diluted average common shares outstanding		200.6		200.8
Basic earnings per average common share	$	0.09	$	0.19
Diluted earnings per average common share	$	0.09	$	0.19
Anti-dilutive shares excluded from earnings per share calculation		—		—

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pension Plans [Member]
Pension Plan and Restoration of Retirement Income Plan:
Amortization of prior service cost, net of tax of $0.1 and $0.0, respectively	$ 0.1	$ 0.0
Amortization of deferred net loss, net of tax of $0.0 and $0.1, respectively	0.0	0.1
Regulatory classification of certain pension costs, net of tax of $1.2 and $0.0, respectively	1.2	0.0
Settlement cost, net of tax of $0.0 and $0.2, respectively	0.0	0.2
Other Postretirement Benefits Plan [Member]
Postretirement plans:
Amortization of deferred net gain, net of tax of $0.0 and $0.0, respectively	$ 0.0	$ 0.0

Fair Value Measurements - Additional Information (Details)	Mar. 31, 2024 USD ($)
Fair Value Disclosures [Abstract]
Derivative fair value	$ 0

Retirement Plans and Postretirement Benefit Plans (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2024

Mar. 31, 2023

Pension Plan [Member]

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]

Service cost

$ 1.4

Interest cost

$ 3.8

$ 4.0

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Expected return on plan assets

$ (3.7)

$ (4.0)

Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Amortization of net (gain) loss

$ 1.7

$ 2.2

Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Amortization of unrecognized prior service cost

^[1]

$ 0.0

Settlement cost

0.0

18.2

Net periodic benefit cost

3.2

21.8

Capitalized portion of net periodic pension benefit cost

0.0

0.6

Other Pension Plan [Member]

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]

Service cost

0.2

0.3

Interest cost

$ 0.1

$ 0.0

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Expected return on plan assets

$ 0.0

Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Amortization of net (gain) loss

$ 0.0

Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Amortization of unrecognized prior service cost

^[1]

$ 0.1

Settlement cost

0.0

Net periodic benefit cost

0.4

Postretirement Benefit Plan [Member]

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]

Service cost

0.0

Interest cost

1.3

Expected return on plan assets

(0.4)

Amortization of net (gain) loss

(0.1)

Total net periodic benefit cost

0.8

Plus: Amount allocated from OGE Energy

0.0

Net periodic benefit cost

0.8

Capitalized portion of net periodic pension benefit cost

0.0

OG&E [Member] | Pension Plan [Member]

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]

Service cost

1.4

1.1

Interest cost

$ 3.3

$ 3.1

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Expected return on plan assets

$ (3.2)

Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Amortization of net (gain) loss

$ 1.6

$ 1.9

Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Settlement cost

$ 0.0

$ 17.2

Total net periodic benefit cost

3.1

20.1

Plus: Amount allocated from OGE Energy

0.0

1.6

Net periodic benefit cost

3.1

21.7

Capitalized portion of net periodic pension benefit cost

0.6

0.5

OG&E [Member] | Other Pension Plan [Member]

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]

Service cost

0.0

Interest cost

$ 0.0

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Expected return on plan assets

$ 0.0

Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Amortization of net (gain) loss

$ 0.0

Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]

Pension and Other Postretirement Benefits Cost (Reversal of Cost)

Settlement cost

$ 0.0

Total net periodic benefit cost

0.0

Plus: Amount allocated from OGE Energy

0.4

Net periodic benefit cost

0.4

OG&E [Member] | Postretirement Benefit Plan [Member]

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]

Service cost

0.0

Interest cost

1.0

Expected return on plan assets

(0.4)

Amortization of net (gain) loss

0.0

Total net periodic benefit cost

0.6

Plus: Amount allocated from OGE Energy

0.1

Net periodic benefit cost

0.7

Capitalized portion of net periodic pension benefit cost

0.0

Oklahoma Jurisdiction | Pension Plan [Member]

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]

Settlement cost

^[2]

0.0

16.7

Change in postretirement expense to maintain allowed recoverable amount in Oklahoma jurisdiction (A)

^[2]

3.3

20.2

Arkansas Jurisdiction | Pension Plan [Member]

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]

Settlement cost

^[2]

0.0

1.5

OKLAHOMA | Postretirement Benefit Plan [Member]

Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]

Change in postretirement expense to maintain allowed recoverable amount in Oklahoma jurisdiction (A)

^[3]

$ 1.1

[1]	Unamortized prior service cost is amortized on a straight-line basis over the average remaining service period to the first eligibility age of participants who are expected to receive a benefit and are active at the date of the plan amendment.
[2]	Included in the pension regulatory asset in each jurisdiction, as indicated in the regulatory assets and liabilities table in Note 1.
[3]	Included in the pension regulatory asset, as indicated in the regulatory assets and liabilities table in Note 1.

Fair Value Measurements

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurements

4. Fair Value Measurements

The classification of the Registrants' fair value measurements requires judgment regarding the degree to which market data is observable or corroborated by observable market data. GAAP establishes a fair value hierarchy that prioritizes the inputs used to measure fair value based on observable and unobservable data. The hierarchy categorizes the inputs into three levels, with the highest priority given to quoted prices in active markets for identical unrestricted assets or liabilities (Level 1) and the lowest priority given to unobservable inputs (Level 3). Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The three levels defined in the fair value hierarchy are as follows:

Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible at the measurement date.

Level 2 inputs are inputs other than quoted prices in active markets included within Level 1 that are either directly or indirectly observable at the reporting date for the asset or liability for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.

Level 3 inputs are prices or valuation techniques for the asset or liability that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Unobservable inputs reflect the reporting entity's own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk).

The Registrants had no material financial instruments measured at fair value on a recurring basis at March 31, 2024 and December 31, 2023. The following table presents the carrying amount and fair value of the Registrants' financial instruments at March 31, 2024 and December 31, 2023, as well as the classification level within the fair value hierarchy.


	March 31, 2024				December 31, 2023
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value		Classification
Long-term Debt (including Long-term Debt due within one year):
OGE Energy Term Loan	$	49.9	$	50.0	$	49.9	$	50.0	Level 2
OG&E Senior Notes	$	4,146.8	$	3,868.5	$	4,146.0	$	3,922.3	Level 2
OG&E Industrial Authority Bonds	$	135.4	$	135.4	$	135.4	$	135.4	Level 2
OG&E Tinker Debt	$	9.2	$	7.0	$	9.2	$	7.1	Level 3

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	$ 37.6

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) Parenthetical - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss	$ 2.3	$ 2.2
OG&E [Member]
Accounts Receivable, Allowance for Credit Loss	$ 2.3	$ 2.2

Long-Term Debt (Additional Information) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Percent of Principal Amount Subject to Optional Tender	100.00%
Term Loan [Member] \| Series Due May 24, 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.375%
OGE Energy [Member] \| Series Due May 24, 2025 [Member]
Debt Instrument [Line Items]
Long term debt	$ 100.0
OGE Energy [Member] \| Term Loan [Member] \| Series Due May 24, 2025 [Member]
Debt Instrument [Line Items]
Long term debt	50.0
OGE Energy [Member] \| Credit Facility [Member] \| Series Due May 24, 2025 [Member]
Debt Instrument [Line Items]
Long term debt	$ 50.0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482900/835-30-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
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-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
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-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
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-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 1B
-Subparagraph (a)
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Reference 5: http://www.xbrl.org/2003/role/exampleRef
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-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/exampleRef
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Reference 8: http://www.xbrl.org/2003/role/exampleRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Paragraph 1B
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-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/exampleRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 1B
-Subparagraph (e)
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (f)
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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Reference 18: http://www.xbrl.org/2003/role/disclosureRef
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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Reference 20: http://www.xbrl.org/2003/role/disclosureRef
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Reference 21: http://www.xbrl.org/2003/role/disclosureRef
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Reference 22: http://www.xbrl.org/2003/role/disclosureRef
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Reference 23: http://www.xbrl.org/2003/role/disclosureRef
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Reference 24: http://www.xbrl.org/2003/role/disclosureRef
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Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I

+ Details

Report of Business Segments

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Report of Business Segments

11. Report of Business Segments

OGE Energy reports its operations primarily through a single segment, captioned "electric company," which is engaged in the generation, transmission, distribution and sale of electric energy. The "other operations" caption primarily includes the operations of the holding company and other energy-related investments. Intersegment revenues are recorded at prices comparable to those of unaffiliated customers and are affected by regulatory considerations. The following tables present the results of OGE Energy's business segments for the three months ended March 31, 2024 and 2023.


Three Months Ended March 31, 2024	Electric Company		Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	596.8	$	—		$	—		$	596.8
Fuel, purchased power and direct transmission expense		232.2		—			—			232.2
Other operation and maintenance		132.4		—			—			132.4
Depreciation and amortization		129.2		—			—			129.2
Taxes other than income		29.0		—			—			29.0
Operating income		74.0		—			—			74.0
Other income		6.6		1.5			(1.7	)		6.4
Interest expense		51.4		10.5			(1.7	)		60.2
Income tax expense (benefit)		4.0		(2.4	)		—			1.6
Net income (loss)	$	25.2	$	(6.6	)	$	—		$	18.6
Total assets	$	12,771.1	$	375.1		$	(228.2	)	$	12,918.0


Three Months Ended March 31, 2023	Electric Company		Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	557.2	$	—		$	—		$	557.2
Fuel, purchased power and direct transmission expense		200.6		—			—			200.6
Other operation and maintenance		131.5		(1.1	)		—			130.4
Depreciation and amortization		121.2		—			—			121.2
Taxes other than income		27.1		1.4			—			28.5
Operating income (loss)		76.8		(0.3	)		—			76.5
Other income		15.3		4.5			(3.4	)		16.4
Interest expense		45.7		5.5			(3.4	)		47.8
Income tax expense		6.6		0.2			—			6.8
Net income (loss)	$	39.8	$	(1.5	)	$	—		$	38.3
Total assets	$	12,762.7	$	587.1		$	(559.5	)	$	12,790.3

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-15

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-31

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Section 50
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-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-40

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//280/tableOfContent

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-26

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-34

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-41

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (a)
-Publisher FASB
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

+ Details

Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Stock-Based Compensation [Abstract]

Schedule of Pre-tax Compensation Expense and Related Income Tax Benefit

The following table presents the Registrants' pre-tax compensation expense and related income tax benefit for the three months ended March 31, 2024 and 2023 related to performance units and restricted stock units for the Registrants' employees.


	OGE Energy				OG&E
	Three Months Ended				Three Months Ended
	March 31,				March 31,
(In millions)	2024		2023		2024		2023
Performance units	$	2.2	$	2.2	$	2.2	$	0.5
Restricted stock units		1.0		0.8		1.0		0.1
Total compensation expense	$	3.2	$	3.0	$	3.2	$	0.6
Income tax benefit	$	0.8	$	0.7	$	0.8	$	0.1

Short-Term Debt and Credit Facilities

3 Months Ended

Mar. 31, 2024

Short-Term Debt [Abstract]

Short-Term Debt and Credit Facilities

9. Short-Term Debt and Credit Facilities

The Registrants borrow on a short-term basis, as necessary, by the issuance of commercial paper and by borrowings under their revolving credit agreements. OGE Energy also borrows under term credit agreements maturing in one year or less, as necessary. The following table presents information regarding the Registrants' revolving credit agreements at March 31, 2024.


Entity	Aggregate Commitment		Amount Outstanding (A)		Weighted-Average Interest Rate				Expiration
	(In millions)
OGE Energy (B)	$	550.0	$	516.6		5.68	%	(F)	December 18, 2028
OGE Energy (C)		50.0		—		—	%	(F)	May 24, 2025
OG&E (D)(E)		550.0		239.5		5.64	%	(F)	December 18, 2028
Total	$	1,150.0	$	756.1		5.68	%

(A)

Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at March 31, 2024.

(B)

This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

(C)

OGE Energy has a $100.0 million floating rate unsecured three-year credit agreement, of which $50.0 million is considered a revolving loan and $50.0 million is considered a term loan. The credit agreement, under certain circumstances, may be increased to a maximum commitment limit of $135.0 million and includes a maximum leverage ratio of 0.65 to 1.0. The other covenants under this credit agreement are substantially the same as OGE Energy's existing $550.0 million revolving credit agreement.

(D)

This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

(E)

OG&E has an intercompany borrowing agreement with OGE Energy whereby OG&E has access to up to $450.0 million of OGE Energy's revolving credit amount. This agreement has a termination date of December 18, 2028. At March 31, 2024, there was $192.5 million in intercompany borrowings under this agreement.

(F)

Represents the weighted-average interest rate for the outstanding borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit.

The Registrants' ability to access the commercial paper market could be adversely impacted by a credit ratings downgrade or major market disruptions. Pricing grids associated with the Registrants' credit facilities could cause annual fees and borrowing rates to increase if an adverse rating impact occurs. The impact of any future downgrade could include an increase in the costs of the Registrants' short-term borrowings, but a reduction in the Registrants' credit ratings would not result in any defaults or accelerations. Any future downgrade could also lead to higher long-term borrowing costs and, if below investment grade, would require the Registrants to post collateral or letters of credit.

OG&E must obtain regulatory approval from the FERC in order to borrow on a short-term basis. OG&E has the necessary regulatory approvals to incur up to $1.0 billion in short-term borrowings at any one time for a two-year period beginning January 1, 2023 and ending December 31, 2024.

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) Parenthetical - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 0.4182	$ 0.4141

Stock Based Compensation

3 Months Ended

Mar. 31, 2024

Stock-Based Compensation [Abstract]

Stock-Based Compensation

5. Stock-Based Compensation


	OGE Energy				OG&E
	Three Months Ended				Three Months Ended
	March 31,				March 31,
(In millions)	2024		2023		2024		2023
Performance units	$	2.2	$	2.2	$	2.2	$	0.5
Restricted stock units		1.0		0.8		1.0		0.1
Total compensation expense	$	3.2	$	3.0	$	3.2	$	0.6
Income tax benefit	$	0.8	$	0.7	$	0.8	$	0.1

During the three months ended March 31, 2024, OGE Energy issued 255,578 shares of new common stock pursuant to OGE Energy's Stock Incentive Plan to satisfy payouts of earned performance units and restricted stock unit grants to the Registrants' employees.

During the three months ended March 31, 2024, OGE Energy granted 275,499 performance units (based on total shareholder return over a three-year period) and 148,345 restricted stock units (three-year cliff vesting period) to the Registrants' employees at $35.86 and $32.74 fair value per share, respectively. As a result of OGE Energy's exit of its former midstream business and becoming primarily an electric company, all employees are directly employed by OG&E beginning in 2024.

Commitments and Contingencies

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

12. Commitments and Contingencies

Except as set forth below, in Note 13 and under "Environmental Laws and Regulations" in Item 2 of Part I and in Item 1 of Part II of this Form 10-Q, the circumstances set forth in Notes 13 and 14 to the financial statements included in the Registrants' 2023 Form 10-K appropriately represent, in all material respects, the current status of the Registrants' material commitments and contingent liabilities.

Environmental Laws and Regulations

The activities of OG&E are subject to numerous stringent and complex federal, state and local laws and regulations governing environmental protection. These laws and regulations can change, restrict or otherwise impact the Registrants' business activities in many ways, including the handling or disposal of waste material, planning for future construction activities to avoid or mitigate harm to threatened or endangered species and requiring the installation and operation of emissions or pollution control equipment. Failure to comply with these laws and regulations could result in the assessment of administrative, civil and criminal penalties, the imposition of remedial requirements and the issuance of orders enjoining future operations. Management believes that all of the Registrants' operations are in substantial compliance with current federal, state and local environmental standards.

Environmental regulation can increase the cost of planning, design, initial installation and operation of OG&E's facilities. Management continues to evaluate its compliance with existing and proposed environmental legislation and regulations and implement appropriate environmental programs in a competitive market.

Other

In the normal course of business, the Registrants are confronted with issues or events that may result in a contingent liability. These generally relate to lawsuits or claims made by third parties, including governmental agencies. When appropriate, management consults with legal counsel and other experts to assess the claim. If, in management's opinion, the Registrants have incurred a probable loss as set forth by GAAP, an estimate is made of the loss, and the appropriate accounting entries are reflected in the condensed financial statements. If the assessment indicates that a potential loss is not probable but reasonably possible, the nature of the contingent matter, together with an estimate of the range of possible loss if determinable and material, would be disclosed. At the present time, based on currently available information, except as disclosed below, the Registrants believe that any reasonably possible losses in excess of accrued amounts arising out of pending or threatened lawsuits or claims would not be quantitatively material to their condensed financial statements and would not have a material adverse effect on their financial position, results of operations or cash flows.

In July 2023, OG&E was named, along with its contractor, as a defendant in a lawsuit filed by an apartment owner and its insurance companies seeking in excess of $60.0 million in damages related to a fire at an apartment building under construction in Oklahoma City. Several additional defendants have also been named. OG&E disputes the claims in the lawsuit and intends to vigorously defend this action. If OG&E was ultimately deemed liable for damages in connection with this incident, OG&E believes its existing insurance policies will cover its costs, in excess of a required retention (the amount of which is not material), to satisfy any liability it may have. Due to the uncertain and preliminary nature of this litigation, the outcome cannot be predicted, and OG&E is unable to provide a range of possible loss in this matter.

Report of Business Segments - Additional Information (Details)	3 Months Ended
	Mar. 31, 2024 Segment
Segment Reporting Information [Line Items]
Number of reporting segments	1
Number of operating segments	1

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Significant Accounting Policies

1. Summary of Significant Accounting Policies

Organization

OGE Energy is a holding company whose primary investment provides electricity in Oklahoma and western Arkansas. OGE Energy's electric company operations are conducted through its wholly-owned subsidiary, OG&E, which generates, transmits, distributes and sells electric energy in Oklahoma and western Arkansas and are reported through OGE Energy's electric company business segment. OG&E's rates are subject to regulation by the OCC, the APSC and the FERC. OG&E was incorporated in 1902 under the laws of the Oklahoma Territory and is the largest electric company in Oklahoma, with a franchised service territory that includes Fort Smith, Arkansas and the surrounding communities. OG&E sold its retail natural gas business in 1928 and is no longer engaged in the natural gas distribution business.

The accounts of OGE Energy and its wholly-owned subsidiaries, including OG&E, are included in OGE Energy's condensed consolidated financial statements. All intercompany transactions and balances are eliminated in such consolidation.

Basis of Presentation

The condensed financial statements included herein have been prepared by the Registrants, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations; however, the Registrants believe that the disclosures are adequate to prevent the information presented from being misleading.

In the opinion of management, all adjustments necessary to fairly present the financial position of the Registrants at March 31, 2024 and December 31, 2023, the results of the Registrants' operations for the three months ended March 31, 2024 and 2023 and the Registrants' cash flows for the three months ended March 31, 2024 and 2023 have been included and are of a normal, recurring nature except as otherwise disclosed. Management also has evaluated the impact of events occurring after March 31, 2024 up to the date of issuance of these condensed financial statements, and these statements contain all necessary adjustments and disclosures resulting from that evaluation.

Due to seasonal fluctuations and other factors, the Registrants' operating results for the three months ended March 31, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024 or for any future period. The condensed financial statements and notes thereto should be read in conjunction with the audited financial statements and notes thereto included in the Registrants' 2023 Form 10-K.

Accounting Records

The accounting records of OG&E are maintained in accordance with the Uniform System of Accounts prescribed by the FERC and adopted by the OCC and the APSC. Additionally, OG&E, as a regulated electric company, is subject to accounting principles for certain types of rate-regulated activities, which provide that certain incurred costs that would otherwise be charged to expense can be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense can be deferred as regulatory liabilities, based on the expected flowback to customers in future rates. Management's expected recovery of deferred costs and flowback of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment.

OG&E records certain incurred costs and obligations as regulatory assets or liabilities if, based on regulatory orders or other available evidence, it is probable that the costs or obligations will be included in amounts allowable for recovery or refund in future rates. The following table presents a summary of OG&E's regulatory assets and liabilities.


	March 31,		December 31,
(In millions)	2024		2023
REGULATORY ASSETS
Current:
Oklahoma Energy Efficiency Rider under recoveries (A)	$	1.7	$	3.8
Other (A)		2.3		2.7
Total current regulatory assets	$	4.0	$	6.5
Non-current:
Oklahoma deferred storm expenses	$	254.9	$	261.1
Pension tracker		95.6		91.9
Benefit obligations regulatory asset		92.8		89.4
Arkansas Winter Storm Uri costs		69.2		71.0
Sooner Dry Scrubbers		17.0		17.2
Arkansas deferred pension expenses		12.4		12.7
Oklahoma SAP S/4 HANA deferred expenses		7.6		6.0
Unamortized loss on reacquired debt		7.0		7.2
COVID-19 impacts		6.4		6.8
Frontier Plant deferred expenses		3.2		3.6
Other		10.5		10.7
Total non-current regulatory assets	$	576.6	$	577.6
REGULATORY LIABILITIES
Current:
Oklahoma fuel clause over recoveries	$	19.9	$	15.6
Arkansas fuel clause over recoveries		16.6		4.9
SPP cost tracker over recoveries (B)		10.8		10.4
Other (B)		1.0		2.3
Total current regulatory liabilities	$	48.3	$	33.2
Non-current:
Income taxes refundable to customers, net	$	823.9	$	838.0
Accrued removal obligations, net		222.0		222.0
Other		1.5		1.6
Total non-current regulatory liabilities	$	1,047.4	$	1,061.6

(A)

Included in Other Current Assets in the condensed balance sheets.

(B)

Included in Other Current Liabilities in the condensed balance sheets.

Management continuously monitors the future recoverability of regulatory assets. When in management's judgment future recovery becomes impaired, the amount of the regulatory asset is adjusted, as appropriate. If OG&E were required to discontinue the application of accounting principles for certain types of rate-regulated activities for some or all of its operations, it could result in writing off the related regulatory assets or liabilities, which could have significant financial effects.

Allowance for Uncollectible Accounts Receivable

Customer balances are generally written off if not collected within six months after the final billing date. The allowance for uncollectible accounts receivable for OG&E is generally calculated by multiplying the last six months of electric revenue by the provision rate, which is based on a 12-month historical average of actual balances written off and is adjusted for current conditions and supportable forecasts as necessary. To the extent the historical collection rates, when incorporating forecasted conditions, are not representative of future collections, there could be an effect on the amount of uncollectible expense recognized. Also, a portion of the uncollectible provision related to fuel within the Oklahoma jurisdiction is being recovered through the fuel adjustment clause. The allowance for uncollectible accounts receivable is a reduction to Accounts Receivable in the condensed balance sheets and is included in Other Operation and Maintenance Expense in the condensed statements of income.

New business customers are required to provide a security deposit in the form of cash, bond or irrevocable letter of credit that is refunded when the account is closed. New residential customers whose outside credit scores indicate an elevated risk are required to provide a security deposit that is refunded based on customer protection rules defined by the OCC and the APSC. The payment behavior of all existing customers is continuously monitored, and, if the payment behavior indicates sufficient risk within the meaning of the applicable utility regulation, customers will be required to provide a security deposit.

Related Party Transactions

OGE Energy charges operating costs to OG&E based on several factors, and operating costs directly related to OG&E are assigned as such. Operating costs incurred for the benefit of OG&E are allocated either as overhead based primarily on labor costs or using the "Distrigas" method, which is a three-factor formula that uses an equal weighting of payroll, net operating revenues and gross property, plant and equipment. OGE Energy adopted this method as a result of a recommendation by the OCC Staff and believes this method provides a reasonable basis for allocating common expenses. OGE Energy charged operating costs to OG&E of $37.6 million during the three months ended March 31, 2023. As a result of OGE Energy's exit of its former midstream business and becoming primarily an electric company, all employees are directly employed by OG&E beginning in 2024.

Accumulated Other Comprehensive Income (Loss)

The following tables present changes in the components of accumulated other comprehensive income (loss) attributable to OGE Energy during the three months ended March 31, 2024 and 2023. All amounts below are presented net of tax.


(In millions)	Pension Plan and Restoration of Retirement Income Plan			Postretirement Benefit Plans			Total
Balance at December 31, 2023	$	(12.9	)	$	5.7		$	(7.2	)
Amounts reclassified from accumulated other comprehensive income (loss)		0.1			(0.1	)		—
Regulatory classification of certain pension costs		3.9			—			3.9
Balance at March 31, 2024	$	(8.9	)	$	5.6		$	(3.3	)


(In millions)	Pension Plan and Restoration of Retirement Income Plan			Postretirement Benefit Plans			Total
Balance at December 31, 2022	$	(18.5	)	$	6.6		$	(11.9	)
Amounts reclassified from accumulated other comprehensive income (loss)		0.3			(0.1	)		0.2
Settlement cost		0.9			—			0.9
Balance at March 31, 2023	$	(17.3	)	$	6.5		$	(10.8	)

The following table presents significant amounts reclassified out of accumulated other comprehensive income (loss) attributable to OGE Energy by the respective line items in net income during the three months ended March 31, 2024 and 2023.


Details about Accumulated Other Comprehensive Income (Loss) Components	Amount Reclassified from Accumulated Other Comprehensive Income (Loss)						Affected Line Item in OGE Energy's Statements of Income
	Three Months Ended
	March 31,
(In millions)	2024			2023
Amortization of Pension Plan and Restoration of Retirement Income Plan items:
Actuarial losses	$	(0.1	)	$	(0.3	)	(A)
Prior service cost		(0.1	)		(0.1	)	(A)
Settlement cost		—			(1.1	)	(A)
		(0.2	)		(1.5	)	Income Before Taxes
		(0.1	)		(0.3	)	Income Tax Expense
	$	(0.1	)	$	(1.2	)	Net Income

Amortization of postretirement benefit plans items:
Actuarial gains	$	0.1		$	0.1		(A)
		0.1			0.1		Income Before Taxes
		—			—		Income Tax Expense
	$	0.1		$	0.1		Net Income

Total reclassifications for the period, net of tax	$	—		$	(1.1	)	Net Income

(A)

These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost (see Note 10 for additional information).

Reclassifications

Certain prior year amounts have been reclassified to conform to current year presentation. The Registrants updated the March 31, 2023 presentation of removal costs related to long-lived assets within the condensed statements of cash flows to reflect the classification in the Registrants' 2023 Form 10-K.

Stock Based Compensation - Additional Information (Details)	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
New common stock shares issued	255,578
Total Shareholder Return [Member] \| Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award non option equity instruments granted	275,499
Average grant date fair Value \| $ / shares	$ 35.86
Total Shareholder Return [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award non option equity instruments granted	148,345
Average grant date fair Value \| $ / shares	$ 32.74

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Report of Business Segments - Summary of OGE Energy's Business Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Operating revenues	$ 596.8	$ 557.2
Fuel, purchased power and direct transmission expense	232.2	200.6
Other operation and maintenance	132.4	130.4
Depreciation and amortization	129.2	121.2
Taxes other than income	29.0	28.5
OPERATING INCOME	74.0	76.5
Other income	6.4	16.4
Interest expense	60.2	47.8
Income tax expense (benefit)	1.6	6.8
Net income (loss)	18.6	38.3
Total assets	12,918.0	12,790.3	$ 12,790.7
Operating Segments [Member] \| Electric Company [Member]
Segment Reporting Information [Line Items]
Operating revenues	596.8	557.2
Fuel, purchased power and direct transmission expense	232.2	200.6
Other operation and maintenance	132.4	131.5
Depreciation and amortization	129.2	121.2
Taxes other than income	29.0	27.1
OPERATING INCOME	74.0	76.8
Other income	6.6	15.3
Interest expense	51.4	45.7
Income tax expense (benefit)	4.0	6.6
Net income (loss)	25.2	39.8
Total assets	12,771.1	12,762.7
Operating Segments [Member] \| Other Operations [Member]
Segment Reporting Information [Line Items]
Operating revenues	0.0	0.0
Fuel, purchased power and direct transmission expense	0.0	0.0
Other operation and maintenance	0.0	(1.1)
Depreciation and amortization	0.0	0.0
Taxes other than income	0.0	1.4
OPERATING INCOME	0.0	(0.3)
Other income	1.5	4.5
Interest expense	10.5	5.5
Income tax expense (benefit)	(2.4)	0.2
Net income (loss)	(6.6)	(1.5)
Total assets	375.1	587.1
Eliminations [Member]
Segment Reporting Information [Line Items]
Operating revenues	0.0	0.0
Fuel, purchased power and direct transmission expense	0.0	0.0
Other operation and maintenance	0.0	0.0
Depreciation and amortization	0.0	0.0
Taxes other than income	0.0	0.0
OPERATING INCOME	0.0	0.0
Other income	(1.7)	(3.4)
Interest expense	(1.7)	(3.4)
Income tax expense (benefit)	0.0	0.0
Net income (loss)	0.0	0.0
Total assets	$ (228.2)	$ (559.5)

Summary of Significant Accounting Policies - Summary of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated other comprehensive income (loss)	$ (7.2)	$ (11.9)
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.2
Settlement cost	0.0	0.9
Regulatory classification of certain pension costs	3.9
Accumulated other comprehensive income (loss)	(3.3)	(10.8)
Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss) [Member] \| Pension Plan [Member]
Accumulated other comprehensive income (loss)	(12.9)	(18.5)
Amounts reclassified from accumulated other comprehensive income (loss)	0.1	0.3
Settlement cost		0.9
Regulatory classification of certain pension costs	3.9
Accumulated other comprehensive income (loss)	(8.9)	(17.3)
Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss) [Member] \| Other Postretirement Benefits Plan [Member]
Accumulated other comprehensive income (loss)	5.7	6.6
Amounts reclassified from accumulated other comprehensive income (loss)	(0.1)	(0.1)
Settlement cost		0.0
Regulatory classification of certain pension costs	0.0
Accumulated other comprehensive income (loss)	$ 5.6	$ 6.5

Common Equity - Schedule of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net Income	$ 18.6	$ 38.3
Basic average common shares outstanding	200.4	200.2
Contingently issuable shares (performance and restricted stock units)	0.2	0.6
Diluted average common shares outstanding	200.6	200.8
Basic earnings per average common share	$ 0.09	$ 0.19
Diluted earnings per average common share	$ 0.09	$ 0.19
Anti-dilutive shares excluded from earnings per share calculation	0.0	0.0
Retained Earnings [Member]
Net Income	$ 18.6	$ 38.3

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

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+ Details

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping

The following table presents the carrying amount and fair value of the Registrants' financial instruments at March 31, 2024 and December 31, 2023, as well as the classification level within the fair value hierarchy.


	March 31, 2024				December 31, 2023
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value		Classification
Long-term Debt (including Long-term Debt due within one year):
OGE Energy Term Loan	$	49.9	$	50.0	$	49.9	$	50.0	Level 2
OG&E Senior Notes	$	4,146.8	$	3,868.5	$	4,146.0	$	3,922.3	Level 2
OG&E Industrial Authority Bonds	$	135.4	$	135.4	$	135.4	$	135.4	Level 2
OG&E Tinker Debt	$	9.2	$	7.0	$	9.2	$	7.1	Level 3

Rate Matters and Regulation

3 Months Ended

Mar. 31, 2024

Regulated Operations [Abstract]

Rate Matters and Regulation

13. Rate Matters and Regulation

Except as disclosed below, the circumstances set forth in Note 14 to the financial statements included in the Registrants' 2023 Form 10-K appropriately represent, in all material respects, the current status of the Registrants' regulatory matters.

Completed Regulatory Matters

Integrated Resource Plans

OG&E has conducted technical conferences for stakeholder engagement on its draft triennial IRP and, on March 29, 2024, issued its final 2024 IRP to the OCC and APSC. This 2024 IRP identified capacity needs of 556, 431 and 1,096 MWs in 2026, 2027 and 2028, respectively. The IRP assumes that Horseshoe Lake unit 7 will be retired in 2024, Tinker units 5A and 5B will be retired in 2025, and Horseshoe Lake unit 8 will be retired in 2027. The IRP also provides that OG&E will issue requests for proposals, beginning in the second quarter of 2024, for resources to meet the capacity needs identified in the IRP while maintaining affordability and reliability for OG&E’s customers.

APSC Proceedings

2023 Formula Rate Plan Filing

In October 2023, OG&E filed its final evaluation report under its Formula Rate Plan, and on January 30, 2024, OG&E and the APSC Staff filed an uncontested joint settlement agreement, which included an annual electric revenue increase of $3.5 million. On March 7, 2024, the APSC issued a final order approving the uncontested settlement agreement, and new rates became effective April 1, 2024.

OCC Proceedings

2022 Oklahoma Fuel Prudency

In June 2023, the Public Utility Division Staff filed their application initiating the review of the 2022 fuel adjustment clause and prudence review. The OCC issued an order on April 11, 2024 finding that OG&E's 2022 fuel costs and generation operations were prudent.

Pending Regulatory Matters

Various proceedings pending before state or federal regulatory agencies are described below. Unless stated otherwise, the Registrants cannot predict when the regulatory agency will act or what action the regulatory agency will take. The Registrants' financial results are dependent in part on timely and constructive decisions by the regulatory agencies that set OG&E's rates.

APSC Proceedings

Capacity Power Purchase Agreement Cost Recovery

On October 4, 2023, OG&E filed an application at the APSC seeking approval of a methodology for recovery of capacity costs associated with short-term power purchase agreements entered into to meet capacity needs in each of the years between 2023 and 2027. On December 29, 2023, the Administrative Law Judge issued an order authorizing OG&E to defer to a regulatory asset its capacity costs associated with short-term power purchase agreements for 2023, along with a carrying charge at the commission-approved customer deposit interest rate. The order requires OG&E and the parties to address treatment for any expenses beyond the calendar year 2023. The parties have agreed to a procedural schedule that involves additional rounds of testimony and a hearing in August 2024.

Arkansas 2024 Generation Construction Notice Filing

On January 19, 2024, OG&E filed an application seeking APSC approval to begin construction of 96 megawatts of combustion turbines at Tinker Air Force Base. A public hearing is scheduled for June 25, 2024, and a decision is expected by the end of August 2024.

FERC Proceedings

Order for Sponsored Transmission Upgrades within SPP

Under Attachment Z2 of the SPP Open Access Transmission Tariff, costs of participant-funded, or "sponsored," transmission upgrades may be recovered from other SPP customers whose transmission service depends on capacity enabled by the upgrade. The SPP Tariff required the SPP to charge for these upgrades beginning in 2008, but the SPP did not begin charging its customers for these upgrades until 2016 due to information system limitations. At that time, the SPP sought a waiver of a time limitation in its tariff that otherwise would have prevented it from waiting until 2016 to bill for the 2008 through 2015 period. The FERC granted the waiver, and the SPP then billed OG&E as a user for these Z2 charges while simultaneously crediting OG&E as a sponsor of Z2 transmission upgrades, resulting in OG&E being a net recipient of sponsored upgrade credits. The majority of these net credits were refunded to customers through OG&E's various rate riders that include SPP activity with the remaining amounts retained by OG&E.

Several companies that were net payers of Z2 charges sought rehearing of the FERC's 2016 order approving the waiver and then appealed it. While that appeal was pending, the FERC obtained a remand and then reversed itself and ruled that the SPP tariff provision that prohibited the 2008 through 2015 charges could not be waived. It ordered the SPP to develop a plan to refund the payments but not to implement the refunds until further ordered to do so. In response, in April 2019, OG&E filed a request for rehearing at the FERC. The next month, it also filed a Complaint at the FERC against the SPP contending that the SPP and not OG&E should bear the cost of any refunds resulting from the SPP's tariff violation and that SPP’s actions also violated its contracts with OG&E. In February 2020, the FERC denied OG&E's request for rehearing but did not consider SPP's refund plan. No date for payment of refunds was established. In August 2021, the U.S. Court of Appeals for the District of Columbia Circuit denied OG&E's petition for review of the FERC's order denying the waiver and requiring refunds. After denying rehearing of its ruling, the court of appeals returned the matter in November 2021 to the FERC for further proceedings in accordance with its opinion. The FERC has not acted on that remand.

If the FERC proceeds to order refunds in full, OG&E estimates it would be required to refund $13.0 million, which is net of amounts paid to other utilities for upgrades and would be subject to interest at the FERC-approved rate. The SPP has stated in filings with the FERC both before and after the court of appeals decision that there are considerable complexities in implementing the refunds that will have to be resolved before they can be paid. Payment of refunds would shift recovery of these upgrade credits to future periods. The SPP filed a report on January 4, 2022 confirming that administering refunds would be complex and could take years unless the SPP is allowed to make certain simplifying assumptions. The SPP also urged that all pending complaint proceedings, including OG&E's complaint and three similar complaints against the SPP, be resolved before any refund process is ordered to begin. OG&E and other parties filed responses to the SPP report, and the matter remains pending at the FERC. Of the $13.0 million, the Registrants would be impacted by $5.0 million in expense that initially benefited the Registrants in 2016, and OG&E customers would incur a net impact of $8.0 million in expense through rider mechanisms or the FERC formula rate. As of March 31, 2024, the Registrants have reserved $13.0 million plus estimated interest for a potential refund.

In November 2022, the FERC issued an order denying OG&E's complaint against the SPP. It also issued orders granting the other three complaints against the SPP in part but awarded no relief. All four complainants timely sought rehearing of these orders. On June 27, 2023, the FERC made final its orders granting in part complaints filed against the SPP by OG&E and three other project sponsors (or groups thereof) on claims arising from the SPP’s failure to implement Attachment Z2 so that project sponsors could be paid as required under the tariff, but awarding no relief. OG&E and the other complainants have appealed to the U.S. Court of Appeals for the Eighth Circuit, where the matter was briefed and oral arguments were heard on March 14, 2024. It will likely be decided in the summer of 2024.

In June 2020, the FERC approved, effective July 1, 2020, an SPP proposal to eliminate Attachment Z2 revenue crediting and replace it with a different rate mechanism that would provide project sponsors, such as OG&E, the same level of recovery. This elimination of the Attachment Z2 revenue crediting would only prospectively impact OG&E and its recovery of any future upgrade costs that it may incur as a project sponsor subsequent to July 2020. All of the existing projects that are eligible to receive revenue credits under Attachment Z2 will remain eligible, which includes the $13.0 million that is at issue in the remand from OG&E's appeal and in OG&E's complaint proceeding.

OCC Proceedings

Oklahoma Retail Electric Supplier Certified Territory Act Causes

As previously disclosed, several rural electric cooperative electricity suppliers filed complaints with the OCC alleging that OG&E, because it was providing service to large loads in another supplier's territory, had violated the Oklahoma Retail Electric Supplier Certified Territory Act. OG&E believes it is lawfully serving customers under specific exemptions under this act that allow it to serve customers having a load of one megawatt or greater. There were five complaint cases initiated at the OCC, and the OCC issued decisions on each of them. The OCC ruled in favor of the electric cooperatives in three of those cases under statutory interpretation and ruled in favor of OG&E in two of those cases under injunctive theory. All five of those cases were appealed to the Oklahoma Supreme Court.

On April 4, 2023, the Oklahoma Supreme Court issued its opinion which vacated the OCC's injunctions with respect to four of the cases and held that the Oklahoma Retail Electric Supplier Certified Territory Act does not limit the mechanism by which OG&E may provide service to large loads in another supplier's territory pursuant to the one megawatt exception. The one pending legal issue left for the Oklahoma Supreme Court to resolve is a statutory interpretation on how a supplier calculates "connected load for initial full operation" for purposes of the exemption under the act. If the Oklahoma Supreme Court ultimately were to find that the customers being served in this single case are not exempted from the Oklahoma Retail Electric Supplier Certified Territory Act, OG&E would have to evaluate the recoverability of some plant investments made to serve these customers and may also be required to reimburse the certified territory supplier in this case for an amount of lost revenue. Such amounts would not be expected to be material to the Registrants' results of operations.

2023 Oklahoma General Rate Review

On December 29, 2023, OG&E filed a general rate review in Oklahoma seeking a rate increase of $332.5 million and a 10.5 percent return on equity based on a common equity percentage of 53.50 percent. The rate review seeks recovery of $1.3 billion of net capital investment since the last general rate review. A hearing on the merits is scheduled for June 17, 2024.

SPP Proceedings

Resource Capacity Accreditation

In July 2022, the SPP Board of Directors approved a new unit accreditation methodology for conventional generation which requires submittal to and approval from the FERC prior to becoming effective. On March 2, 2023, the FERC rejected the SPP’s proposed capacity accreditation methodology for wind and solar generators. Following the FERC’s rejection, the SPP began an extensive review of both the methodology proposed for thermal resources which had not yet been submitted to the FERC, and the accreditation methodology for wind and solar generators. These methodologies were reviewed and approved by both the Regional State Committee and the SPP Board of Directors in late October 2023 and were submitted to the FERC for approval on February 23, 2024. If approved by the FERC, both methodologies are expected to be effective in 2026 and may contribute to OG&E’s incremental capacity needs.

Retirement Plans and Postretirement Benefit Plans

3 Months Ended

Mar. 31, 2024

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Retirement Plans and Postretirement Benefit Plans

10. Retirement Plans and Postretirement Benefit Plans

Net Periodic Benefit Cost

in the Pension tracker in the regulatory assets and liabilities table in Note 1 and within Other Net Periodic Benefit Income in the statements of income.


	Pension Plan						Restoration of Retirement Income Plan
	Three Months Ended						Three Months Ended
OGE Energy	March 31,						March 31,
(In millions)	2024			2023			2024		2023
Service cost	$	1.4		$	1.4		$	0.2	$	0.3
Interest cost		3.8			4.0			0.1		—
Expected return on plan assets		(3.7	)		(4.0	)		—		—
Amortization of net loss		1.7			2.2			—		—
Amortization of unrecognized prior service cost (A)		—			—			0.1		0.1
Settlement cost		—			18.2			—		—
Net periodic benefit cost	$	3.2		$	21.8		$	0.4	$	0.4

(A)


	Pension Plan						Restoration of Retirement Income Plan
	Three Months Ended						Three Months Ended
OG&E	March 31,						March 31,
(In millions)	2024			2023			2024		2023
Service cost	$	1.4		$	1.1		$	—	$	—
Interest cost		3.3			3.1			—		—
Expected return on plan assets		(3.2	)		(3.2	)		—		—
Amortization of net loss		1.6			1.9			—		—
Settlement cost		—			17.2			—		—
Total net periodic benefit cost		3.1			20.1			—		—
Plus: Amount allocated from OGE Energy		—			1.6			0.4		0.4
Net periodic benefit cost	$	3.1		$	21.7		$	0.4	$	0.4


	Three Months Ended
	March 31,
(In millions)	2024		2023
Change in pension expense to maintain allowed recoverable amount in Oklahoma jurisdiction (A)	$	3.3	$	20.2
Deferral of pension expense related to pension settlement charges included in the above line item:
Oklahoma jurisdiction (A)	$	—	$	16.7
Arkansas jurisdiction (A)	$	—	$	1.5

(A)

Included in the pension regulatory asset in each jurisdiction, as indicated in the regulatory assets and liabilities table in Note 1.


	OGE Energy						OG&E
	Postretirement Benefit Plans						Postretirement Benefit Plans
	Three Months Ended						Three Months Ended
	March 31,						March 31,
(In millions)	2024			2023			2024			2023
Service cost	$	—		$	—		$	—		$	—
Interest cost		1.3			1.3			1.0			1.0
Expected return on plan assets		(0.4	)		(0.4	)		(0.4	)		(0.4	)
Amortization of net gain		(0.1	)		(0.1	)		—			—
Total net periodic benefit cost		0.8			0.8			0.6			0.6
Plus: Amount allocated from OGE Energy		—			—			0.1			0.1
Net periodic benefit cost	$	0.8		$	0.8		$	0.7		$	0.7


	Three Months Ended
	March 31,
(In millions)	2024		2023
Change in postretirement expense to maintain allowed recoverable amount in Oklahoma jurisdiction (A)	$	1.1	$	1.1

(A)

Included in the pension regulatory asset, as indicated in the regulatory assets and liabilities table in Note 1.


	OGE Energy				OG&E
	Three Months Ended				Three Months Ended
	March 31,				March 31,
(In millions)	2024		2023		2024		2023
Capitalized portion of net periodic pension benefit cost	$	—	$	0.6	$	0.6	$	0.5
Capitalized portion of net periodic postretirement benefit cost	$	—	$	—	$	—	$	—

Pension Plan Funding

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Accounting Pronouncements

3 Months Ended

Mar. 31, 2024

Accounting Pronouncement [Abstract]

Accounting Pronouncements

2. Accounting Pronouncements

In November 2023, the Financial Accounting Standards Board issued ASU 2023-07, "Segment Reporting (Topic 280) Improvements to Reportable Segment Disclosures." The amendments in this update improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis. The standard is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The Registrants are currently evaluating the impact of adopting this standard on their financial statements.

In December 2023, the Financial Accounting Standards Board issued ASU 2023-09, "Income Taxes (Topic 740) Improvements to Income Tax Disclosures." The amendments in this update require public entities on an annual basis to (i) disclose specific categories in the rate reconciliation and (ii) provide additional information for reconciling items that meet a quantitative threshold. Further, the amendments require entities to disclose on an annual basis income taxes paid (net of refunds received) disaggregated by federal (national), state and foreign taxes and to disaggregate the information by jurisdiction based on a quantitative threshold. The standard is effective January 1, 2025, and early adoption is permitted. The Registrants are currently evaluating the impact of adopting this standard on their financial statements.

The Registrants believe that other recently adopted and recently issued accounting standards that are not yet effective do not appear to have a material impact on the Registrants' financial position, results of operations or cash flows upon adoption.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

+ References

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+ Details

Fair Value Measurements - Summary of Financial Instrument Measured at Fair Value On A Recurring Basis and Carrying Amount and Fair Value (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
OGE Energy Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	$ 49.9	$ 49.9
Long-Term Debt, Fair Value	50.0	50.0
OG&E Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	4,146.8	4,146.0
Long-Term Debt, Fair Value	3,868.5	3,922.3
OG&E Industrial Authority Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	135.4	135.4
Long-Term Debt, Fair Value	135.4	135.4
OG&E Tinker Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	9.2	9.2
Long-Term Debt, Fair Value	$ 7.0	$ 7.1

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References + Details

Short-Term Debt and Credit Facilities (Tables)

3 Months Ended

Mar. 31, 2024

Short-Term Debt [Abstract]

Schedule of Line of Credit Facilities

The following table presents information regarding the Registrants' revolving credit agreements at March 31, 2024.


Entity	Aggregate Commitment		Amount Outstanding (A)		Weighted-Average Interest Rate				Expiration
	(In millions)
OGE Energy (B)	$	550.0	$	516.6		5.68	%	(F)	December 18, 2028
OGE Energy (C)		50.0		—		—	%	(F)	May 24, 2025
OG&E (D)(E)		550.0		239.5		5.64	%	(F)	December 18, 2028
Total	$	1,150.0	$	756.1		5.68	%

(A)

Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at March 31, 2024.

(B)

This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

(C)

OGE Energy has a $100.0 million floating rate unsecured three-year credit agreement, of which $50.0 million is considered a revolving loan and $50.0 million is considered a term loan. The credit agreement, under certain circumstances, may be increased to a maximum commitment limit of $135.0 million and includes a maximum leverage ratio of 0.65 to 1.0. The other covenants under this credit agreement are substantially the same as OGE Energy's existing $550.0 million revolving credit agreement.

(D)

This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

(E)

(F)

Represents the weighted-average interest rate for the outstanding borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit.

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	OG&E [Member]	Common Stock	Common Stock OG&E [Member]	Treasury Stock	Premium on Common Stock	Premium on Common Stock OG&E [Member]	Retained Earnings	Retained Earnings OG&E [Member]	Accumulated Other Comprehensive (Loss) Income
Balance at Dec. 31, 2022	$ 4,413.4	$ 5,045.2	$ 2.0	$ 100.9	$ (0.1)	$ 1,132.5	$ 1,473.7	$ 3,290.9	$ 3,470.6	$ (11.9)
Common Stock, Shares, Outstanding at Dec. 31, 2022			200.2	40.4
Treasury Stock, Common, Shares at Dec. 31, 2022					0.0
Changes in Stockholders' Equity
Net income	38.3	39.8	$ 0.0	$ 0.0	$ 0.0	0.0	0.0	38.3	39.8	0.0
Net income, Number of Shares			0.0	0.0	0.0
Other comprehensive income, net of tax	1.1	0.0	$ 0.0		$ 0.0	0.0		0.0		1.1
Other comprehensive income, net of tax, Number of Shares			0.0		0.0
Dividends declared on common stock	(83.6)		$ 0.0		$ 0.0	0.0		(83.6)		0.0
Dividends declared on common stock, Number of Shares			0.0		0.0
Stock-based compensation	0.8	0.6	$ 0.0	$ 0.0	$ 0.1	0.7	0.6	0.0	0.0	0.0
Stock-based compensation, Number of Shares			0.1	0.0	0.0
Balance at Mar. 31, 2023	4,370.0	5,085.6	$ 2.0	$ 100.9	$ 0.0	1,133.2	1,474.3	3,245.6	3,510.4	(10.8)
Common Stock, Shares, Outstanding at Mar. 31, 2023			200.3	40.4
Treasury Stock, Common, Shares at Mar. 31, 2023					0.0
Balance at Dec. 31, 2023	4,511.6	4,974.7	$ 2.0	$ 100.9		1,143.1	1,476.8	3,373.7	3,397.0	(7.2)
Common Stock, Shares, Outstanding at Dec. 31, 2023			200.3	40.4
Changes in Stockholders' Equity
Net income	18.6	25.2	$ 0.0	$ 0.0		0.0	0.0	18.6	25.2	0.0
Net income, Number of Shares			0.0	0.0
Other comprehensive income, net of tax	3.9	0.0	$ 0.0			0.0		0.0		3.9
Other comprehensive income, net of tax, Number of Shares			0.0
Dividends declared on common stock	(86.1)		$ 0.0			0.0		(86.1)		0.0
Dividends declared on common stock, Number of Shares			0.0
Stock-based compensation	(2.7)	3.2	$ 0.0	$ 0.0		(2.7)	3.2	0.0	0.0	0.0
Stock-based compensation, Number of Shares			0.2	0.0
Balance at Mar. 31, 2024	$ 4,445.3	$ 5,003.1	$ 2.0	$ 100.9		$ 1,140.4	$ 1,480.0	$ 3,306.2	$ 3,422.2	$ (3.3)
Common Stock, Shares, Outstanding at Mar. 31, 2024			200.5	40.4

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
CURRENT ASSETS
Cash and cash equivalents	$ 4.3	$ 0.2
Accounts receivable	181.6	208.8
Accrued unbilled revenues	63.2	72.7
Income taxes receivable	19.0	18.2
Fuel inventories	157.9	158.5
Materials and supplies, at average cost	245.3	254.3
Other	53.7	58.8
Total current assets	725.0	771.5
OTHER PROPERTY AND INVESTMENTS
Other	118.9	114.0
Total other property and investments	118.9	114.0
PROPERTY, PLANT AND EQUIPMENT
In service	15,743.0	15,588.2
Construction work in progress	599.0	522.2
Total property, plant and equipment	16,342.0	16,110.4
Less: accumulated depreciation	4,873.2	4,809.4
Net property, plant and equipment	11,468.8	11,301.0
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	576.6	577.6
Other	28.7	26.6
Total deferred charges and other assets	605.3	604.2
TOTAL ASSETS	12,918.0	12,790.7
CURRENT LIABILITIES
Short-term debt	755.7	499.2
Accounts payable	211.9	276.4
Dividends payable	83.9	83.8
Customer deposits	105.6	103.5
Accrued taxes	29.0	47.6
Accrued interest	55.5	57.4
Accrued compensation	30.7	46.8
Long-term debt due within one year	79.4	0.0
Fuel clause over recoveries	36.5	20.5
Other	41.5	44.0
Total current liabilities	1,429.7	1,179.2
LONG-TERM DEBT	4,261.9	4,340.5
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	161.5	172.7
Deferred income taxes	1,318.4	1,300.8
Deferred investment tax credits	11.1	11.3
Regulatory liabilities	1,047.4	1,061.6
Other	242.7	213.0
Total deferred credits and other liabilities	2,781.1	2,759.4
Total liabilities	8,472.7	8,279.1
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,142.4	1,145.1
Retained earnings	3,306.2	3,373.7
Accumulated other comprehensive loss, net of tax	(3.3)	(7.2)
Total stockholders' equity	4,445.3	4,511.6
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	12,918.0	12,790.7
OG&E [Member]
CURRENT ASSETS
Cash and cash equivalents	4.3	0.2
Accounts receivable	181.6	208.8
Accrued unbilled revenues	63.2	72.7
Fuel inventories	157.9	158.5
Materials and supplies, at average cost	245.3	254.3
Other	45.1	46.7
Total current assets	697.4	741.2
OTHER PROPERTY AND INVESTMENTS
Total other property and investments	8.0	4.6
PROPERTY, PLANT AND EQUIPMENT
In service	15,736.9	15,582.1
Construction work in progress	599.0	522.2
Total property, plant and equipment	16,335.9	16,104.3
Less: accumulated depreciation	4,873.2	4,809.4
Net property, plant and equipment	11,462.7	11,294.9
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	576.6	577.6
Other	26.4	24.3
Total deferred charges and other assets	603.0	601.9
TOTAL ASSETS	12,771.1	12,642.6
CURRENT LIABILITIES
Short-term debt	46.6	0.0
Accounts payable	180.3	228.5
Advances from parent	223.4	147.7
Customer deposits	105.6	103.5
Accrued taxes	28.7	47.2
Accrued interest	55.5	56.6
Accrued compensation	30.7	37.0
Long-term debt due within one year	79.4	0.0
Fuel clause over recoveries	36.5	20.5
Other	41.7	43.6
Total current liabilities	828.4	684.6
LONG-TERM DEBT	4,212.0	4,290.6
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	96.4	96.2
Deferred income taxes	1,358.7	1,340.8
Deferred investment tax credits	11.1	11.3
Regulatory liabilities	1,047.4	1,061.6
Other	214.0	182.8
Total deferred credits and other liabilities	2,727.6	2,692.7
Total liabilities	7,768.0	7,667.9
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,580.9	1,577.7
Retained earnings	3,422.2	3,397.0
Total stockholders' equity	5,003.1	4,974.7
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 12,771.1	$ 12,642.6

Fair Value Measures and Disclosures (Policies)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurement, Policy

Level 1 inputs are quoted prices in active markets for identical unrestricted assets or liabilities that are accessible at the measurement date.

Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Regulatory Assets and Liabilities

The following table presents a summary of OG&E's regulatory assets and liabilities.


	March 31,		December 31,
(In millions)	2024		2023
REGULATORY ASSETS
Current:
Oklahoma Energy Efficiency Rider under recoveries (A)	$	1.7	$	3.8
Other (A)		2.3		2.7
Total current regulatory assets	$	4.0	$	6.5
Non-current:
Oklahoma deferred storm expenses	$	254.9	$	261.1
Pension tracker		95.6		91.9
Benefit obligations regulatory asset		92.8		89.4
Arkansas Winter Storm Uri costs		69.2		71.0
Sooner Dry Scrubbers		17.0		17.2
Arkansas deferred pension expenses		12.4		12.7
Oklahoma SAP S/4 HANA deferred expenses		7.6		6.0
Unamortized loss on reacquired debt		7.0		7.2
COVID-19 impacts		6.4		6.8
Frontier Plant deferred expenses		3.2		3.6
Other		10.5		10.7
Total non-current regulatory assets	$	576.6	$	577.6
REGULATORY LIABILITIES
Current:
Oklahoma fuel clause over recoveries	$	19.9	$	15.6
Arkansas fuel clause over recoveries		16.6		4.9
SPP cost tracker over recoveries (B)		10.8		10.4
Other (B)		1.0		2.3
Total current regulatory liabilities	$	48.3	$	33.2
Non-current:
Income taxes refundable to customers, net	$	823.9	$	838.0
Accrued removal obligations, net		222.0		222.0
Other		1.5		1.6
Total non-current regulatory liabilities	$	1,047.4	$	1,061.6

(A)

Included in Other Current Assets in the condensed balance sheets.

(B)

Included in Other Current Liabilities in the condensed balance sheets.

Schedule of Accumulated Other Comprehensive Income (Loss)


(In millions)	Pension Plan and Restoration of Retirement Income Plan			Postretirement Benefit Plans			Total
Balance at December 31, 2023	$	(12.9	)	$	5.7		$	(7.2	)
Amounts reclassified from accumulated other comprehensive income (loss)		0.1			(0.1	)		—
Regulatory classification of certain pension costs		3.9			—			3.9
Balance at March 31, 2024	$	(8.9	)	$	5.6		$	(3.3	)


(In millions)	Pension Plan and Restoration of Retirement Income Plan			Postretirement Benefit Plans			Total
Balance at December 31, 2022	$	(18.5	)	$	6.6		$	(11.9	)
Amounts reclassified from accumulated other comprehensive income (loss)		0.3			(0.1	)		0.2
Settlement cost		0.9			—			0.9
Balance at March 31, 2023	$	(17.3	)	$	6.5		$	(10.8	)

Schedule of Amounts Reclassified out of Accumulated Other Comprehensive Income


Details about Accumulated Other Comprehensive Income (Loss) Components	Amount Reclassified from Accumulated Other Comprehensive Income (Loss)						Affected Line Item in OGE Energy's Statements of Income
	Three Months Ended
	March 31,
(In millions)	2024			2023
Amortization of Pension Plan and Restoration of Retirement Income Plan items:
Actuarial losses	$	(0.1	)	$	(0.3	)	(A)
Prior service cost		(0.1	)		(0.1	)	(A)
Settlement cost		—			(1.1	)	(A)
		(0.2	)		(1.5	)	Income Before Taxes
		(0.1	)		(0.3	)	Income Tax Expense
	$	(0.1	)	$	(1.2	)	Net Income

Amortization of postretirement benefit plans items:
Actuarial gains	$	0.1		$	0.1		(A)
		0.1			0.1		Income Before Taxes
		—			—		Income Tax Expense
	$	0.1		$	0.1		Net Income

Total reclassifications for the period, net of tax	$	—		$	(1.1	)	Net Income

(A)

These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost (see Note 10 for additional information).

Summary of Significant Accounting Policies - Schedule of Regulatory Assets and Liabilities (Details) - USD ($)
$ in Millions

Mar. 31, 2024

Dec. 31, 2023

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Current

$ 4.0

$ 6.5

Regulatory Assets, Noncurrent

576.6

577.6

Regulatory Liability, Current

48.3

33.2

Regulatory Liability, Noncurrent

1,047.4

1,061.6

OKLAHOMA [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Fuel clause under recoveries

19.9

15.6

ARKANSAS [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Fuel clause under recoveries

16.6

4.9

SPP Cost Tracker Over Recoveries [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Liability, Current

^[1]

10.8

10.4

Other Regulatory Liabilities [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Liability, Current

^[1]

1.0

2.3

Regulatory Liability, Noncurrent

1.5

1.6

Income taxes recoverable from customers, net [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Liability, Noncurrent

823.9

838.0

Accrued removal obligations [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Liability, Noncurrent

222.0

Pension tracker [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Noncurrent

95.6

91.9

Oklahoma Energy Efficiency Rider Under Recovery [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Current

^[2]

1.7

3.8

Deferred storm expenses [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Noncurrent

254.9

261.1

Benefit obligations regulatory asset [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Noncurrent

92.8

89.4

Winter Storm Uri costs [Member] | ARKANSAS [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Noncurrent

69.2

71.0

Dry Scrubber Regulatory Asset [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Noncurrent

17.0

17.2

Deferred Pension Expenses [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Noncurrent

12.4

12.7

Unamortized loss on reacquired debt [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Noncurrent

7.0

7.2

Other Regulatory Assets [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Current

^[2]

2.3

2.7

Regulatory Assets, Noncurrent

10.5

10.7

COVID-19 Deferred Expenses [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Noncurrent

6.4

6.8

SAP S/4 HANA Deferred Expenses [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Noncurrent

7.6

6.0

Deferred Plant Expense [Member]

Schedule of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets, Noncurrent

$ 3.2

$ 3.6

[1]	Included in Other Current Liabilities in the condensed balance sheets.
[2]	Included in Other Current Assets in the condensed balance sheets.

Summary of Significant Accounting Policies - Summary of Amount Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2024

Mar. 31, 2023

Accumulated Other Comprehensive Income (Loss) [Line Items]

Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent

$ 0.0

$ (1.1)

Pension Plan [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax

^[1]

(0.1)

(0.3)

Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax

^[1]

(0.1)

Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax

^[1]

0.0

(1.1)

Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax

(0.2)

(1.5)

Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax

(0.1)

(0.3)

Amounts reclassified from accumulated other comprehensive income (loss), net of tax

(0.1)

(1.2)

Other Postretirement Benefits Plan [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax

^[1]

0.1

Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax

0.1

Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax

0.0

Amounts reclassified from accumulated other comprehensive income (loss), net of tax

$ 0.1

[1]	These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost (see Note 10 for additional information).

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 18.6	$ 38.3
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation and amortization	129.2	121.2
Deferred income taxes and other tax credits, net	2.6	0.9
Allowance for equity funds used during construction	(4.7)	(4.5)
Stock-based compensation expense	3.2	3.0
Regulatory assets	(6.4)	(14.8)
Regulatory liabilities	(3.3)	(2.7)
Other assets	(4.5)	(2.2)
Other liabilities	20.7	(6.4)
Change in certain current assets and liabilities:
Accounts receivable and accrued unbilled revenues, net	36.7	43.4
Income taxes receivable	(0.8)	5.9
Fuel, materials and supplies inventories	9.6	(38.0)
Fuel recoveries	16.0	144.8
Other current assets	5.1	2.3
Accounts payable	(102.0)	(103.8)
Other current liabilities	(37.0)	(15.1)
Net cash provided from operating activities	83.0	172.3
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(226.9)	(286.0)
Cost of removal and other	(16.6)	(26.2)
Net cash used in investing activities	(243.5)	(312.2)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	0.0	444.7
Increase in short-term debt	256.5	0.0
Dividends paid on common stock	(85.9)	(83.6)
Proceeds (costs) from issuance of common stock	0.1	0.0
Cash paid for employee equity-based compensation	(6.1)	(2.3)
Net cash provided from financing activities	164.6	358.8
NET CHANGE IN CASH AND CASH EQUIVALENTS	4.1	218.9
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	0.2	88.1
CASH AND CASH EQUIVALENTS AT END OF PERIOD	4.3	307.0
OG&E [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	25.2	39.8
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation and amortization	129.2	121.2
Deferred income taxes and other tax credits, net	4.2	(0.4)
Allowance for equity funds used during construction	(4.7)	(4.5)
Stock-based compensation expense	3.2	0.6
Regulatory assets	(6.4)	(14.8)
Regulatory liabilities	(3.3)	(2.7)
Other assets	(3.6)	(2.9)
Other liabilities	28.5	(2.8)
Change in certain current assets and liabilities:
Accounts receivable and accrued unbilled revenues, net	36.7	43.9
Fuel, materials and supplies inventories	9.6	(38.0)
Fuel recoveries	16.0	144.8
Other current assets	1.6	3.1
Accounts payable	(85.7)	(87.4)
Income taxes payable - parent	(0.2)	6.9
Other current liabilities	(25.7)	(12.3)
Net cash provided from operating activities	124.6	194.5
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(226.9)	(286.0)
Cost of removal	(16.2)	(24.5)
Net cash used in investing activities	(243.1)	(310.5)
CASH FLOWS FROM FINANCING ACTIVITIES
Changes in advances with parent	76.0	(328.7)
Proceeds from long-term debt	0.0	444.7
Increase in short-term debt	46.6	0.0
Net cash provided from financing activities	122.6	116.0
NET CHANGE IN CASH AND CASH EQUIVALENTS	4.1	0.0
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	0.2	0.0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 4.3	$ 0.0

Common Equity (Tables)

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Schedule of Earnings Per Share Basic and Diluted

The following table presents the calculation of basic and diluted earnings per share for OGE Energy.


	Three Months Ended
	March 31,
(In millions, except per share data)	2024		2023
Net income	$	18.6	$	38.3
Average common shares outstanding:
Basic average common shares outstanding		200.4		200.2
Effect of dilutive securities:
Contingently issuable shares (performance and restricted stock units)		0.2		0.6
Diluted average common shares outstanding		200.6		200.8
Basic earnings per average common share	$	0.09	$	0.19
Diluted earnings per average common share	$	0.09	$	0.19
Anti-dilutive shares excluded from earnings per share calculation		—		—

Income Taxes

3 Months Ended

Mar. 31, 2024

Income Taxes [Abstract]

Income Taxes

6. Income Taxes

OGE Energy files consolidated income tax returns in the U.S. federal jurisdiction and various state jurisdictions. OG&E is a part of the consolidated income tax return of OGE Energy. With few exceptions, the Registrants are no longer subject to U.S. federal tax or state and local examinations by tax authorities for years prior to 2020. Income taxes are generally allocated to each company in the affiliated group, including OG&E, based on its stand-alone taxable income or loss. Federal investment tax credits previously claimed on electric utility property have been deferred and will be amortized to income over the life of the related property. Oklahoma investment tax credits are also earned on investments at electric generating facilities which further reduce OG&E's effective tax rate.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

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+ Details

Stock-Based Compensation - Schedule of Pre-tax Compensation Expense and Related Income Tax Benefit (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 3.2	$ 3.0
Income tax benefit	0.8	0.7
OG&E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	3.2	0.6
Income tax benefit	0.8	0.1
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	2.2	2.2
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	1.0	0.8
Restricted Stock Units (RSUs) [Member] \| OG&E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	1.0	0.1
Total Shareholder Return [Member] \| Performance Units [Member] \| OG&E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 2.2	$ 0.5

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 18.6	$ 38.3

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

Reference 39: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

+ Details

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

Basis of Presentation

Accounting Records


	March 31,		December 31,
(In millions)	2024		2023
REGULATORY ASSETS
Current:
Oklahoma Energy Efficiency Rider under recoveries (A)	$	1.7	$	3.8
Other (A)		2.3		2.7
Total current regulatory assets	$	4.0	$	6.5
Non-current:
Oklahoma deferred storm expenses	$	254.9	$	261.1
Pension tracker		95.6		91.9
Benefit obligations regulatory asset		92.8		89.4
Arkansas Winter Storm Uri costs		69.2		71.0
Sooner Dry Scrubbers		17.0		17.2
Arkansas deferred pension expenses		12.4		12.7
Oklahoma SAP S/4 HANA deferred expenses		7.6		6.0
Unamortized loss on reacquired debt		7.0		7.2
COVID-19 impacts		6.4		6.8
Frontier Plant deferred expenses		3.2		3.6
Other		10.5		10.7
Total non-current regulatory assets	$	576.6	$	577.6
REGULATORY LIABILITIES
Current:
Oklahoma fuel clause over recoveries	$	19.9	$	15.6
Arkansas fuel clause over recoveries		16.6		4.9
SPP cost tracker over recoveries (B)		10.8		10.4
Other (B)		1.0		2.3
Total current regulatory liabilities	$	48.3	$	33.2
Non-current:
Income taxes refundable to customers, net	$	823.9	$	838.0
Accrued removal obligations, net		222.0		222.0
Other		1.5		1.6
Total non-current regulatory liabilities	$	1,047.4	$	1,061.6

(A)

Included in Other Current Assets in the condensed balance sheets.

(B)

Included in Other Current Liabilities in the condensed balance sheets.

Allowance for Uncollectible Accounts Receivable

Related Party Transactions

Accumulated Other Comprehensive Income (Loss)


(In millions)	Pension Plan and Restoration of Retirement Income Plan			Postretirement Benefit Plans			Total
Balance at December 31, 2023	$	(12.9	)	$	5.7		$	(7.2	)
Amounts reclassified from accumulated other comprehensive income (loss)		0.1			(0.1	)		—
Regulatory classification of certain pension costs		3.9			—			3.9
Balance at March 31, 2024	$	(8.9	)	$	5.6		$	(3.3	)


(In millions)	Pension Plan and Restoration of Retirement Income Plan			Postretirement Benefit Plans			Total
Balance at December 31, 2022	$	(18.5	)	$	6.6		$	(11.9	)
Amounts reclassified from accumulated other comprehensive income (loss)		0.3			(0.1	)		0.2
Settlement cost		0.9			—			0.9
Balance at March 31, 2023	$	(17.3	)	$	6.5		$	(10.8	)


Details about Accumulated Other Comprehensive Income (Loss) Components	Amount Reclassified from Accumulated Other Comprehensive Income (Loss)						Affected Line Item in OGE Energy's Statements of Income
	Three Months Ended
	March 31,
(In millions)	2024			2023
Amortization of Pension Plan and Restoration of Retirement Income Plan items:
Actuarial losses	$	(0.1	)	$	(0.3	)	(A)
Prior service cost		(0.1	)		(0.1	)	(A)
Settlement cost		—			(1.1	)	(A)
		(0.2	)		(1.5	)	Income Before Taxes
		(0.1	)		(0.3	)	Income Tax Expense
	$	(0.1	)	$	(1.2	)	Net Income

Amortization of postretirement benefit plans items:
Actuarial gains	$	0.1		$	0.1		(A)
		0.1			0.1		Income Before Taxes
		—			—		Income Tax Expense
	$	0.1		$	0.1		Net Income

Total reclassifications for the period, net of tax	$	—		$	(1.1	)	Net Income

(A)

These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost (see Note 10 for additional information).

Reclassifications

Document and Entity Information Document	3 Months Ended
Document and Entity Information Document	Mar. 31, 2024 shares
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	1-12579
Entity Registrant Name	OGE ENERGY CORP.
Entity Incorporation, State or Country Code	OK
Entity Tax Identification Number	73-1481638
Entity Central Index Key	0001021635
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false
Title of 12(b) Security	Common Stock
Trading Symbol	OGE
Security Exchange Name	NYSE
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Address, Address Line One	321 North Harvey
Entity Address, Address Line Two	P.O. Box 321
Entity Address, City or Town	Oklahoma City
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	73101-0321
City Area Code	405
Local Phone Number	553-3000
Entity Common Stock, Shares Outstanding	200,547,842
OG&E [Member]
Entity Information [Line Items]
Entity File Number	1-1097
Entity Registrant Name	OKLAHOMA GAS AND ELECTRIC COMPANY
Entity Tax Identification Number	73-0382390
Entity Central Index Key	0000074145
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding	40,378,745

Short-Term Debt and Credit Facilities - Additional Information (Details) $ in Billions	Mar. 31, 2024 USD ($)
OG&E [Member]
Line of Credit Facility [Line Items]
Short Term Borrowing Capacity That Has Regulatory Approval	$ 1.0

Short-Term Debt and Credit Facilities - Schedule of Line of Credit Facilities (Details)
$ in Millions

3 Months Ended

Mar. 31, 2024

USD ($)

Line of Credit Facility [Line Items]

Aggregate Commitment

$ 1,150.0

Line of Credit Outstanding, Amount

$ 756.1

^[1]

Weighted - Average Interest Rate

5.68%

OGE Energy [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Current Borrowing Capacity

$ 550.0

^[2]

Line of Credit Outstanding, Amount

$ 516.6

^[1],[2]

Weighted - Average Interest Rate

5.68%

^[2],[3]

Maturity

Dec. 18, 2028

^[2]

OGE Energy [Member] | Term Loan [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Current Borrowing Capacity

$ 50.0

^[4]

Line of Credit Outstanding, Amount

$ 0.0

^[1],[4]

Weighted - Average Interest Rate

0.00%

^[3],[4]

Maturity

May 24, 2025

^[4]

OG&E [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Current Borrowing Capacity

$ 550.0

^[5],[6]

Letters of Credit Outstanding, Amount

$ 239.5

^[1],[5],[6]

Weighted - Average Interest Rate

5.64%

^[3],[5],[6]

Maturity

Dec. 18, 2028

^[5],[6]

[1]	Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at March 31, 2024.
[2]	This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.
[3]	Represents the weighted-average interest rate for the outstanding borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit.
[4]	OGE Energy has a $100.0 million floating rate unsecured three-year credit agreement, of which $50.0 million is considered a revolving loan and $50.0 million is considered a term loan. The credit agreement, under certain circumstances, may be increased to a maximum commitment limit of $135.0 million and includes a maximum leverage ratio of 0.65 to 1.0. The other covenants under this credit agreement are substantially the same as OGE Energy's existing $550.0 million revolving credit agreement.
[5]	OG&E has an intercompany borrowing agreement with OGE Energy whereby OG&E has access to up to $450.0 million of OGE Energy's revolving credit amount. This agreement has a termination date of December 18, 2028. At March 31, 2024, there was $192.5 million in intercompany borrowings under this agreement.
[6]	This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.

Retirement Plans and Postretirement Benefit Plans - Schedule of Capitalized Pension and Postretirement Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Capitalized portion of net periodic pension benefit cost	$ 0.0	$ 0.6
Pension Plan [Member] \| OG&E [Member]
Defined Benefit Plan Disclosure [Line Items]
Capitalized portion of net periodic pension benefit cost	0.6	0.5
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Capitalized portion of net periodic pension benefit cost	0.0	0.0
Other Postretirement Benefits Plan [Member] \| OG&E [Member]
Defined Benefit Plan Disclosure [Line Items]
Capitalized portion of net periodic pension benefit cost	$ 0.0	$ 0.0

Long-Term Debt - Schedule of Long-term Debt Instruments (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jan. 01, 2025
Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jan. 01, 2025
Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jun. 01, 2027
Redeemable during the next 12 months
Debt Instrument [Line Items]
Long-term Debt	$ 135.4
OG&E [Member] \| Redeemable during the next 12 months \| Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Long term debt	47.0
OG&E [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Long term debt	32.4
OG&E [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Long term debt	$ 56.0
Minimum [Member] \| Redeemable during the next 12 months \| Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.15%
Minimum [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.90%
Minimum [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.15%
Maximum [Member] \| Redeemable during the next 12 months \| Garfield Industrial Authority Bond [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.85%
Maximum [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.75%
Maximum [Member] \| Redeemable during the next 12 months \| Muskogee Industrial Authority Bond Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.85%

Common Equity - Automatic Dividend Reinvestment and Stock Purchase Plan - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Stock Issued During Period, Shares, New Issues	255,578
Proceeds from issuance of common stock	$ 0.1	$ 0.0
Automatic Dividend Reinvestment and Stock Purchase Plan [Member]
Stock Issued During Period, Shares, New Issues	4,900
Proceeds from issuance of common stock	$ 0.2
Shares Held in Reserve Related to Dividend Reinvestment Plan and Stock Purchase Plan	4,797,244

Report of Business Segments (Tables)

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Summary of OGE Energy's Business Segments

The following tables present the results of OGE Energy's business segments for the three months ended March 31, 2024 and 2023.


Three Months Ended March 31, 2024	Electric Company		Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	596.8	$	—		$	—		$	596.8
Fuel, purchased power and direct transmission expense		232.2		—			—			232.2
Other operation and maintenance		132.4		—			—			132.4
Depreciation and amortization		129.2		—			—			129.2
Taxes other than income		29.0		—			—			29.0
Operating income		74.0		—			—			74.0
Other income		6.6		1.5			(1.7	)		6.4
Interest expense		51.4		10.5			(1.7	)		60.2
Income tax expense (benefit)		4.0		(2.4	)		—			1.6
Net income (loss)	$	25.2	$	(6.6	)	$	—		$	18.6
Total assets	$	12,771.1	$	375.1		$	(228.2	)	$	12,918.0


Three Months Ended March 31, 2023	Electric Company		Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	557.2	$	—		$	—		$	557.2
Fuel, purchased power and direct transmission expense		200.6		—			—			200.6
Other operation and maintenance		131.5		(1.1	)		—			130.4
Depreciation and amortization		121.2		—			—			121.2
Taxes other than income		27.1		1.4			—			28.5
Operating income (loss)		76.8		(0.3	)		—			76.5
Other income		15.3		4.5			(3.4	)		16.4
Interest expense		45.7		5.5			(3.4	)		47.8
Income tax expense		6.6		0.2			—			6.8
Net income (loss)	$	39.8	$	(1.5	)	$	—		$	38.3
Total assets	$	12,762.7	$	587.1		$	(559.5	)	$	12,790.3

Short-Term Debt and Credit Facilities - Schedule of Line of Credit Facilities (Parenthetical) (Details)

3 Months Ended

Mar. 31, 2024

USD ($)

Line of Credit Facility [Line Items]

Line of Credit Facility, Maximum Borrowing Capacity

$ 1,150,000,000

Outstanding Intercompany Borrowings

192,500,000

Og and E [Member]

Line of Credit Facility [Line Items]

Intercompany Borrowing Agreement - Maximum Borrowing Capacity

450,000,000

Line of Credit Facility, Current Borrowing Capacity

$ 550,000,000

^[1],[2]

Credit facility termination date

Dec. 18, 2028

^[1],[2]

OGE Energy [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Current Borrowing Capacity

$ 550,000,000

^[3]

Credit facility termination date

Dec. 18, 2028

^[3]

OGE Energy [Member] | Series Due May 24, 2025 [Member]

Line of Credit Facility [Line Items]

Long term debt

$ 100,000,000

OGE Energy [Member] | Series due August 15, 2028 [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Maximum Borrowing Capacity

$ 135,000,000

Debt Instrument Maximum Leverage Ratio

0.65

OGE Energy [Member] | Credit Facility [Member] | Series Due May 24, 2025 [Member]

Line of Credit Facility [Line Items]

Long term debt

$ 50,000,000

OGE Energy [Member] | Term Loan [Member]

Line of Credit Facility [Line Items]

Line of Credit Facility, Current Borrowing Capacity

$ 50,000,000

^[4]

Credit facility termination date

May 24, 2025

^[4]

OGE Energy [Member] | Term Loan [Member] | Series Due May 24, 2025 [Member]

Line of Credit Facility [Line Items]

Long term debt

$ 50,000,000

[1]	OG&E has an intercompany borrowing agreement with OGE Energy whereby OG&E has access to up to $450.0 million of OGE Energy's revolving credit amount. This agreement has a termination date of December 18, 2028. At March 31, 2024, there was $192.5 million in intercompany borrowings under this agreement.
[2]	This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.
[3]	This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.
[4]	OGE Energy has a $100.0 million floating rate unsecured three-year credit agreement, of which $50.0 million is considered a revolving loan and $50.0 million is considered a term loan. The credit agreement, under certain circumstances, may be increased to a maximum commitment limit of $135.0 million and includes a maximum leverage ratio of 0.65 to 1.0. The other covenants under this credit agreement are substantially the same as OGE Energy's existing $550.0 million revolving credit agreement.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues from contracts with customers	$ 582.6	$ 544.6
Other revenues	14.2	12.6
Operating revenues	596.8	557.2
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	232.2	200.6
OPERATING EXPENSES
Other operation and maintenance	132.4	130.4
Depreciation and amortization	129.2	121.2
Taxes other than income	29.0	28.5
Operating expenses	290.6	280.1
OPERATING INCOME	74.0	76.5
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	4.7	4.5
Other net periodic benefit income	1.7	1.5
Other income	4.5	16.9
Other expense	(4.5)	(6.5)
Net other income	6.4	16.4
INTEREST EXPENSE
Interest on long-term debt	52.0	48.1
Allowance for borrowed funds used during construction	(3.4)	(2.1)
Interest on short-term debt and other interest charges	11.6	1.8
Interest expense	60.2	47.8
INCOME BEFORE TAXES	20.2	45.1
INCOME TAX EXPENSE	1.6	6.8
NET INCOME	$ 18.6	$ 38.3
BASIC AVERAGE COMMON SHARES OUTSTANDING	200.4	200.2
DILUTED AVERAGE COMMON SHARES OUTSTANDING	200.6	200.8
BASIC EARNINGS PER AVERAGE COMMON SHARE	$ 0.09	$ 0.19
DILUTED EARNINGS PER AVERAGE COMMON SHARE	$ 0.09	$ 0.19
Other comprehensive income, net of tax	$ 3.9	$ 1.1
Comprehensive income	22.5	39.4
OG&E [Member]
Revenues from contracts with customers	582.6	544.6
Other revenues	14.2	12.6
Operating revenues	596.8	557.2
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	232.2	200.6
OPERATING EXPENSES
Other operation and maintenance	132.4	131.5
Depreciation and amortization	129.2	121.2
Taxes other than income	29.0	27.1
Operating expenses	290.6	279.8
OPERATING INCOME	74.0	76.8
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	4.7	4.5
Other net periodic benefit income	1.8	1.6
Other income	2.0	10.1
Other expense	(1.9)	(0.9)
Net other income	6.6	15.3
INTEREST EXPENSE
Interest on long-term debt	51.1	46.5
Allowance for borrowed funds used during construction	(3.4)	(2.1)
Interest on short-term debt and other interest charges	3.7	1.3
Interest expense	51.4	45.7
INCOME BEFORE TAXES	29.2	46.4
INCOME TAX EXPENSE	4.0	6.6
NET INCOME	25.2	39.8
Other comprehensive income, net of tax	0.0	0.0
Comprehensive income	$ 25.2	$ 39.8