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v3.22.2.2

Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Regulatory Assets and Liabilities [Table Text Block] | The following table presents a summary of OG&E's regulatory assets and liabilities.
| September 30, | December 31,
(In millions) | 2022 | 2021
REGULATORY ASSETS |  |
Current: |  |
Oklahoma fuel clause under recoveries | $ | 467.0 |  | $ | 140.4 |
Arkansas fuel clause under recoveries | 40.2 |  | 11.5 |
SPP cost tracker under recovery (A) | 0.2 |  | 9.3 |
Oklahoma Energy Efficiency Rider under recoveries (A) | — |  | 11.7 |
Other (A) | 6.7 |  | 9.7 |
Total current regulatory assets | $ | 514.1 |  | $ | 182.6 |
Non-current: |  |
Oklahoma Winter Storm Uri costs | $ | — |  | $ | 747.9 |
Oklahoma deferred storm expenses | 203.3 |  | 172.8 |
Benefit obligations regulatory asset | 99.1 |  | 109.2 |
Arkansas Winter Storm Uri costs | 80.6 |  | 88.9 |
Pension tracker | 47.6 |  | 42.9 |
Sooner Dry Scrubbers | 18.3 |  | 18.9 |
Arkansas deferred pension expenses | 11.8 |  | 12.1 |
Unamortized loss on reacquired debt | 8.3 |  | 8.9 |
COVID-19 impacts | 8.0 |  | 8.2 |
Frontier Plant deferred expenses | 5.6 |  | 6.7 |
Smart Grid | 0.3 |  | 3.9 |
Other | 11.0 |  | 10.4 |
Total non-current regulatory assets | $ | 493.9 |  | $ | 1,230.8 |
REGULATORY LIABILITIES |  |
Current: |  |
Oklahoma investment tax credit rider under credit (B) | $ | 5.3 |  | $ | — |
Oklahoma Energy Efficiency Rider over recoveries (B) | 5.2 |  | — |
Other (B) | 1.5 |  | 2.5 |
Total current regulatory liabilities | $ | 12.0 |  | $ | 2.5 |
Non-current: |  |
Income taxes refundable to customers, net | $ | 904.2 |  | $ | 930.7 |
Accrued removal obligations, net | 272.5 |  | 296.8 |
Other | 2.0 |  | 3.6 |
Total non-current regulatory liabilities | $ | 1,178.7 |  | $ | 1,231.1 |
(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) [Table Text Block] | The following tables present changes in the components of accumulated other comprehensive income (loss) attributable to OGE Energy during the nine months ended September 30, 2022 and 2021. 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, 2021 | $ | (26.1) |  |  |  |  | $ | 1.3 |  |  |  |  |  |  |  | $ | (24.8) |
Other comprehensive income (loss) before reclassifications | — |  |  |  |  | — |  |  |  |  |  |  |  | — |
Amounts reclassified from accumulated other comprehensive income | 1.0 |  |  |  |  | (0.1) |  |  |  |  |  |  |  | 0.9 |
Settlement cost | 9.5 |  |  |  |  | — |  |  |  |  |  |  |  | 9.5 |
Balance at September 30, 2022 | $ | (15.6) |  |  |  |  | $ | 1.2 |  |  |  |  |  |  |  | $ | (14.4) |
(In millions) | Pension Plan and Restoration of Retirement Income Plan |  |  | Postretirement Benefit Plans |  | Other Comprehensive Gain (Loss) from Unconsolidated Affiliates |  | Total
Balance at December 31, 2020 | $ | (34.1) |  |  |  |  | $ | 3.3 |  |  |  | $ | (1.3) |  |  | $ | (32.1) |
Other comprehensive income before reclassifications | — |  |  |  |  | — |  |  |  | 0.6 |  |  | 0.6 |
Amounts reclassified from accumulated other comprehensive income (loss) | 1.3 |  |  |  |  | (0.9) |  |  |  | — |  |  | 0.4 |
Settlement cost | 4.8 |  |  |  |  | — |  |  |  | — |  |  | 4.8 |
Balance at September 30, 2021 | $ | (28.0) |  |  |  |  | $ | 2.4 |  |  |  | $ | (0.7) |  |  | $ | (26.3) |
Schedule of Amounts Reclassified out of Accumulated Other Comprehensive Income [Table Text Block] | 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 and nine months ended September 30, 2022 and 2021.
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 | Nine Months Ended |
| September 30, | September 30, |
(In millions) | 2022 | 2021 | 2022 | 2021 |
Amortization of Pension Plan and Restoration of Retirement Income Plan items: |  |  |  |  |
Actuarial losses | $ | (0.4) |  | $ | (0.6) |  | $ | (1.2) |  | $ | (1.8) |  | (A)
Prior service cost | (0.1) |  | (0.1) |  | (0.2) |  | (0.1) |  | (A)
Settlement cost | (1.9) |  | (1.4) |  | (12.4) |  | (6.7) |  | (A)
| (2.4) |  | (2.1) |  | (13.8) |  | (8.6) |  | Income Before Taxes
| (0.6) |  | (0.5) |  | (3.3) |  | (2.5) |  | Income Tax Expense
| $ | (1.8) |  | $ | (1.6) |  | $ | (10.5) |  | $ | (6.1) |  | Net Income
Amortization of postretirement benefit plans items: |  |  |  |  |
Prior service credit | $ | 0.2 |  | $ | 0.4 |  | $ | 0.2 |  | $ | 1.3 |  | (A)
Actuarial losses | — |  | — |  | — |  | (0.1) |  | (A)
| 0.2 |  | 0.4 |  | 0.2 |  | 1.2 |  | Income Before Taxes
| 0.1 |  | 0.1 |  | 0.1 |  | 0.3 |  | Income Tax Expense
| $ | 0.1 |  | $ | 0.3 |  | $ | 0.1 |  | $ | 0.9 |  | Net Income
Total reclassifications for the period, net of tax | $ | (1.7) |  | $ | (1.3) |  | $ | (10.4) |  | $ | (5.2) |  | Net Income
(A)These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost (see Note 11 for additional information).
Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Table Text Block] | The following table presents a reconciliation of OGE Energy's equity in earnings of unconsolidated affiliates for the three and nine months ended September 30, 2021.
(In millions) | Three Months Ended | Nine Months Ended
Enable net income | $ | 107.0 |  | $ | 341.0 |
OGE Energy's percent ownership at period end | 25.5 | % | 25.5 | %
OGE Energy's portion of Enable net income | $ | 27.5 |  | $ | 87.0 |
Amortization of basis difference and dilution recognition (A) | 13.7 |  | 40.9 |
Equity in earnings of unconsolidated affiliates | $ | 41.2 |  | $ | 127.9 |
(A)Includes loss on dilution, net of proportional basis difference recognition.

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