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Other Liabilities (Other Accrued and Other Long-Term Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Other Accrued Liabilities      
Accrued payroll and benefits $ 350.5 $ 342.6  
Insurance reserves, current portion 216.6 187.5 $ 193.5
Accrued fees and taxes 182.9 168.5  
Accrued dividends 168.3 156.4  
Operating right-of-use lease liabilities, current portion 54.8 57.9  
Ceded insurance reserves, current portion 35.4 32.0  
Accrued professional fees and legal settlement reserves 17.9 8.6  
Derivative and hedging liabilities 8.3 1.2  
Other 136.8 103.6  
Total 1,171.5 1,058.3  
Other Long-Term Liabilities      
Operating right-of-use lease liabilities 194.9 238.0  
Deferred compensation plan liability 114.7 98.6  
Ceded insurance reserves 92.1 84.1  
Derivative and hedging liabilities 71.3 99.7  
Contingent purchase price and acquisition holdbacks 59.1 60.5  
Withdrawal liability - multiemployer pension funds 19.6 20.0  
Other 42.9 59.8  
Total $ 594.6 $ 660.7