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Long-term Debt - Long-term Debt Outstanding (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Schedule of Outstanding Long-term Debt    
Finance lease obligations $ 402.1 $ 391.7
Total debt and finance lease obligations 3,297.2 3,288.9
Less: Current portion (137.2) (38.3)
Long-term debt, net of current portion 3,160.0 3,250.6
Term loan facilities | Term loan facilities    
Schedule of Outstanding Long-term Debt    
Total debt $ 248.3 $ 251.6
Senior Notes | 5.125% Senior Notes due 2023    
Schedule of Outstanding Long-term Debt    
Debt instrument interest rate (percent) 5.125% 5.125%
Total debt $ 298.3 $ 298.1
Senior Notes | 5.75% Senior Notes due 2025    
Schedule of Outstanding Long-term Debt    
Debt instrument interest rate (percent) 5.75% 5.75%
Total debt $ 346.5 $ 346.3
Senior Notes | 4.50% Senior Notes due 2028    
Schedule of Outstanding Long-term Debt    
Debt instrument interest rate (percent) 4.50% 4.50%
Total debt $ 785.5 $ 785.0
Senior Notes | 4.75% Senior Notes due 2030    
Schedule of Outstanding Long-term Debt    
Debt instrument interest rate (percent) 4.75% 4.75%
Total debt $ 783.5 $ 783.2
Senior Notes | 4.625% Senior Notes due 2031    
Schedule of Outstanding Long-term Debt    
Debt instrument interest rate (percent) 4.625% 4.625%
Total debt $ 393.3 $ 393.2
Other notes payable    
Schedule of Outstanding Long-term Debt    
Total debt $ 39.7 $ 39.8