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Retirement Plans and Postretirement Benefit Plans - Summary of Gross Benefit Payments Registrants Expect to Pay (Details) $ in Millions | Dec. 31, 2024 USD ($)
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Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Postretirement Plan, Expected Future Benefit Payments, Next Twelve Months | $ 13.9
Postretirement Plan, Expected Future Benefit Payments, Year Two | 11.3
Postretirement Plan, Expected Future Benefit Payments, Year Three | 10.3
Postretirement Plan, Expected Future Benefit Payments in Year Four | 9.4
Postretirement Plan, Expected Future Benefit Payments, Year Five | 8.7
Postretirement Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter | 35.6
Og and E [Member] |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Postretirement Plan, Expected Future Benefit Payments, Next Twelve Months | 10.5
Postretirement Plan, Expected Future Benefit Payments, Year Two | 8.4
Postretirement Plan, Expected Future Benefit Payments, Year Three | 7.7
Postretirement Plan, Expected Future Benefit Payments in Year Four | 7.1
Postretirement Plan, Expected Future Benefit Payments, Year Five | 6.6
Postretirement Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter | $ 27.6

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