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Commitments and Contingencies - Unrecorded Unconditional Purchase Obligations Disclosure (Details) $ in Millions | Dec. 31, 2024 USD ($)
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Loss Contingencies [Line Items] |
Purchase Obligation, Due in Next Twelve Months | $ 405.9
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 257.3
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 191.6
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 125.1
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 125.5
Unrecorded Unconditional Purchase Obligation, Total | 1,105.4
OG&E minimum fuel purchase commitments [Member] |
Loss Contingencies [Line Items] |
Purchase Obligation, Due in Next Twelve Months | 138.6
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 82.2
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 74.7
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 63.7
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 63.8
Unrecorded Unconditional Purchase Obligation, Total | 423.0
OG&E Estimated Wind Purchase Commitments [Member] |
Loss Contingencies [Line Items] |
Purchase Obligation, Due in Next Twelve Months | 56.9
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 57.3
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 57.8
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 58.4
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 58.6
Unrecorded Unconditional Purchase Obligation, Total | 289.0
OG&E Capacity Commitments [Member] |
Loss Contingencies [Line Items] |
Purchase Obligation, Due in Next Twelve Months | 33.0
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 40.2
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 41.4
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 0.0
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 0.0
Unrecorded Unconditional Purchase Obligation, Total | 114.6
OG&E long-term service agreement commitments [Member] |
Loss Contingencies [Line Items] |
Purchase Obligation, Due in Next Twelve Months | 35.7
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 43.8
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 17.7
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 3.0
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 3.1
Unrecorded Unconditional Purchase Obligation, Total | 103.3
OG&E Generation Capacity Construction Commitments [Member] |
Loss Contingencies [Line Items] |
Purchase Obligation, Due in Next Twelve Months | 141.7
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 33.8
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 0.0
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 0.0
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 0.0
Unrecorded Unconditional Purchase Obligation, Total | $ 175.5

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