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Pension and Other Postretirement Benefit Plans - Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Retirement Benefits [Abstract]    
Projected benefit obligation $ 482.7 $ 761.2
Accumulated benefit obligation 476.0 757.2
Fair value of plan assets $ 348.6 $ 539.8