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Employee Benefit Plans (Collective Bargaining Agreements and Multiemployer Pension Plans) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jun. 30, 2020
Multiemployer Plans [Line Items]        
Percentage of workforce covered by collective bargaining agreement 24.00%      
Withdrawal costs       $ 31.6
Employer contribution cost $ 76.4 $ 73.2 $ 72.1  
Individually insignificant, contributions in excess of $ 3.5      
Percentage of funded status of pension protection act critical zone maximum, less than 65.00%      
Percentage of funded status of pension protection act endangered zone maximum, less than 80.00%      
Percentage of funded status of pension protection act Safe zone minimum, at least 80.00%      
Percent of total contributions that we are listed as providing more than for Local 731 Private Scavengers and Garage Attendants Pension Trust Fund 5.00%      
Collective Bargaining Arrangements Expiring In 2021        
Multiemployer Plans [Line Items]        
Percentage of workforce covered by collective bargaining agreement 6.00%