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Postretirement Benefit Plans - Pension Plans with Accumulated Benefit Obligation in Excess of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Postemployment Benefits [Abstract]    
Projected benefit obligation $ 78.9 $ 107.6
Accumulated benefit obligation 77.3 105.3
Fair value of plan assets $ 0.0 $ 0.0