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Leases (Tables) | 12 Months Ended
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Dec. 31, 2023
Leases [Abstract] |
Schedule of Financial Statement Information of Lease Liabilities | The following tables present amounts recognized for operating leases in the Registrants' statements of income, statements of cash flows and balance sheets and supplemental information related to those amounts recognized.
|  | OGE Energy |  |  | OG&E |
|  | Year Ended December 31, |  |  | Year Ended December 31, |
(In millions) |  | 2023 |  |  | 2022 |  |  | 2021 |  |  | 2023 |  |  | 2022 |  |  | 2021 |
Operating lease cost |  | $ | 6.4 |  |  | $ | 5.9 |  |  | $ | 6.3 |  |  | $ | 6.4 |  |  | $ | 5.9 |  |  | $ | 5.7 |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating cash flows for operating leases |  | $ | 5.2 |  |  | $ | 5.3 |  |  | $ | 6.3 |  |  | $ | 5.2 |  |  | $ | 5.3 |  |  | $ | 5.7 |
Right-of-use assets obtained in exchange for new operating lease liabilities |  | $ | — |  |  | $ | 1.5 |  |  | $ | — |  |  | $ | — |  |  | $ | 1.5 |  |  | $ | — |
| OGE Energy |  |  | OG&E |
(Dollars in millions) | December 31, 2023 |  | December 31, 2022 |  |  | December 31, 2023 |  | December 31, 2022 |
Right-of-use assets at period end (A) | $ | 25.9 |  | $ | 30.2 |  |  | $ | 25.9 |  | $ | 30.2 |
Operating lease liabilities at period end (B) | $ | 30.5 |  | $ | 34.8 |  |  | $ | 30.5 |  | $ | 34.8 |
Operating lease weighted-average remaining lease term (in years) |  | 11.4 |  |  | 11.6 |  |  |  | 11.4 |  |  | 11.6 |
Operating lease weighted-average discount rate |  | 4.0 | % |  | 4.0 | % |  |  | 4.0 | % |  | 4.0 | %
(A) Included in Property, Plant and Equipment in the Registrants' balance sheets. (B) Included in Other Deferred Credits and Other Liabilities in the Registrants' balance sheets.
Schedule of Maturity Analysis of Operating Lease Liabilities | The following table presents a maturity analysis of the Registrants' operating lease liabilities.
Future minimum operating lease payments as of December 31: |  | OGE Energy |  |  | OG&E |
(In millions) |  |  |  |  |  |
2024 |  | $ | 3.7 |  |  | $ | 3.7 |
2025 |  |  | 3.5 |  |  |  | 3.5 |
2026 |  |  | 3.0 |  |  |  | 3.0 |
2027 |  |  | 3.0 |  |  |  | 3.0 |
2028 |  |  | 3.1 |  |  |  | 3.1 |
Thereafter |  |  | 22.6 |  |  |  | 22.6 |
Total future minimum lease payments |  |  | 38.9 |  |  |  | 38.9 |
Less: Imputed interest |  |  | 8.4 |  |  |  | 8.4 |
Present value of net minimum lease payments |  | $ | 30.5 |  |  | $ | 30.5 |

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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