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Retirement Plans and Postretirement Benefit Plans - Summary of Reconciliation of Postretirement Benefit Plans Investments (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
Level 3 Asset Value, Beginning of Period | $ 16.8
Claims paid | (4.1)
Realized losses | (1.5)
Investment fees | (0.1)
Interest income | 0.6
Net unrealized gains related to instruments held at the reporting date | 1.9
Level 3 Asset Value, End of Period | $ 13.6

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