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Long-Term Debt - Summary (Details) - USD ($)
$ in Millions
Dec. 31, 2021
May 03, 2021
Dec. 31, 2020
Jul. 30, 2020
Apr. 11, 2019
Jun. 30, 2017
Debt Instrument [Line Items]            
Finance lease obligations $ 364.6   $ 281.2      
Less: unamortized debt issuance costs (16.5)   (16.3)      
Total debt 2,938.8   2,856.8      
Less: Current maturities 60.4   64.4      
Total long-term debt 2,878.4   2,792.4      
Notes payable and other secured loans            
Debt Instrument [Line Items]            
Long-term debt 145.0   137.5      
Senior secured term loan | Secured Debt            
Debt Instrument [Line Items]            
Long-term debt 1,530.7   1,539.4      
Unamortized fair value discount 3.0   3.7      
Senior secured revolving credit facility | Secured Debt            
Debt Instrument [Line Items]            
Long-term debt 0.0   0.0      
6.750% senior unsecured notes due 2025 | Senior Notes            
Debt Instrument [Line Items]            
Long-term debt $ 370.0   370.0      
Debt instrument, stated rate (percent) 6.75% 6.75%       6.75%
10.000% senior unsecured notes due 2027 | Senior Notes            
Debt Instrument [Line Items]            
Long-term debt $ 545.0   $ 545.0      
Less: unamortized debt issuance costs       $ (1.0)    
Debt instrument, stated rate (percent) 10.00%       10.00%