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Long-Term Debt (Tables) | 3 Months Ended
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Mar. 31, 2022
Long-term Debt, Unclassified [Abstract] |
Schedule of Long-term Debt Instruments [Table Text Block] | 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)
0.11% | - | 0.64% | Garfield Industrial Authority, January 1, 2025 | $ | 47.0 |
0.11% | - | 0.57% | Muskogee Industrial Authority, January 1, 2025 | 32.4 |
0.11% | - | 0.64% | Muskogee Industrial Authority, June 1, 2027 | 56.0 |
Total (redeemable during next 12 months) | $ | 135.4 |

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