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Employee Benefit Plans and Other Postretirement Benefits - Additional Information (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Amounts Recognized in Accumulated Other Comprehensive Loss (Income) (Pre-Tax):      
Accumulated benefit obligation for plans with obligations in excess of plan assets $ 1,400.0    
Defined Benefit Plan, Pension Plan Benefit Obligation in Excess of Plan Assets, Plan Assets $ 1,400.0 $ 1,500.0  
Weighted-Average expected return on plan assets for 2021 4.08%    
Pension Contributions [Abstract]      
Company's common stock 1.2 1.2  
Deferred compensation liability $ 25.2 $ 22.6  
Minimum      
Pension Contributions [Abstract]      
Company's contribution to pension plan, percentage 3.00%    
Maximum      
Pension Contributions [Abstract]      
Company's contribution to pension plan, percentage 5.00%    
Pension Plans      
Amounts Recognized in Accumulated Other Comprehensive Loss (Income) (Pre-Tax):      
Weighted-Average expected return on plan assets for 2021 4.91% 5.29% 6.06%
Pension Contributions [Abstract]      
Contributions to pension plan $ 51.1 $ 83.7  
Pension Plans | Qualified Plan      
Pension Contributions [Abstract]      
Contributions to pension plan 50.0 82.5 $ 57.9
Matching Contributions      
Pension Contributions [Abstract]      
Company's contribution to defined contribution plans 38.2 40.8 39.0
Service Related Contributions      
Pension Contributions [Abstract]      
Company's contribution to defined contribution plans $ 46.4 $ 39.4 $ 36.7