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Debt (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Oct. 16, 2019
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2019
Long-term Debt, by Current and Noncurrent [Abstract]        
Finance lease obligations   $ 70.1    
Other   16.7 $ 7.9 $ 7.9
Total debt   1,941.9 1,547.0 1,547.0
Less: Deferred financing costs   8.9 7.0 7.0
Total debt, net   1,933.0 1,540.0 1,540.0
Less: Current portion   47.5 37.4 37.4
Total long-term debt, net   1,885.5 1,502.6 1,502.6
2026 Senior Notes        
Long-term Debt, by Current and Noncurrent [Abstract]        
Senior notes   $ 600.0 $ 600.0 $ 600.0
Stated percentage   5.50% 5.50% 5.50%
2026 Senior Notes | Fair Value, Inputs, Level 2        
Long-term Debt, by Current and Noncurrent [Abstract]        
Notes, fair value   $ 539.1 $ 634.9 $ 634.9
2023 Senior Notes        
Long-term Debt, by Current and Noncurrent [Abstract]        
Senior notes   $ 450.0 $ 450.0 $ 450.0
Stated percentage   5.625% 5.625% 5.625%
2023 Senior Notes | Fair Value, Inputs, Level 2        
Long-term Debt, by Current and Noncurrent [Abstract]        
Notes, fair value   $ 419.0 $ 464.2 $ 464.2
Securitized debt        
Long-term Debt, by Current and Noncurrent [Abstract]        
Securitized debt   $ 85.0 0.0 $ 0.0
Securitized debt | London Interbank Offered Rate (LIBOR)        
Long-term Debt, by Current and Noncurrent [Abstract]        
Index rate or LIBOR plus (as a percent)   0.80%   0.80%
Financing and capital lease obligations        
Long-term Debt, by Current and Noncurrent [Abstract]        
Finance lease obligations   $ 70.1 $ 64.1 $ 64.1
2019 Credit Agreement | Revolving Credit Facility        
Long-term Debt, by Current and Noncurrent [Abstract]        
Line of credit   300.4    
2019 Credit Agreement | Line of Credit        
Long-term Debt, by Current and Noncurrent [Abstract]        
Equity interest of subsidiary guarantor 100.00%      
Equity voting rights of subsidiary 65.00%      
Covenant letters of credit outstanding ratio $ 40.0      
Domestic and foreign qualified cash, maximum percentage 100.00%      
Domestic and foreign qualified cash, maximum $ 200.0      
Covenant netted cash   $ 195.9    
Commitment fee   0.175% 0.25%  
2019 Credit Agreement | Base Rate | Line of Credit        
Long-term Debt, by Current and Noncurrent [Abstract]        
Index rate or LIBOR plus (as a percent) 0.625%      
2019 Credit Agreement | London Interbank Offered Rate (LIBOR) | Line of Credit        
Long-term Debt, by Current and Noncurrent [Abstract]        
Index rate or LIBOR plus (as a percent) 1.625%      
2019 Credit Agreement | Line of Credit        
Long-term Debt, by Current and Noncurrent [Abstract]        
Line of Credit Facility, Remaining Borrowing Capacity   $ 101.9    
2019 Credit Agreement | Line of Credit | Incremental Facility        
Long-term Debt, by Current and Noncurrent [Abstract]        
Line of credit borrowing $ 550.0      
2019 Credit Agreement | Line of Credit | Revolving Credit Facility        
Long-term Debt, by Current and Noncurrent [Abstract]        
Line of credit borrowing 425.0      
2019 Credit Agreement | Line of Credit | Term Loan Facility        
Long-term Debt, by Current and Noncurrent [Abstract]        
Line of credit borrowing 425.0      
2019 Credit Agreement | Line of Credit | Letter of Credit        
Long-term Debt, by Current and Noncurrent [Abstract]        
Line of credit borrowing $ 60.0      
Proceeds from lines of credit   22.7    
2016 Credit Agreement | Term A Facility        
Long-term Debt, by Current and Noncurrent [Abstract]        
Line of credit   $ 419.7 $ 425.0 425.0
2016 Credit Agreement | Term A Facility | London Interbank Offered Rate (LIBOR)        
Long-term Debt, by Current and Noncurrent [Abstract]        
Index rate or LIBOR plus (as a percent)   1.25%    
2016 Credit Agreement | Revolver        
Long-term Debt, by Current and Noncurrent [Abstract]        
Line of credit   $ 300.4 $ 0.0 $ 0.0
2016 Credit Agreement | Revolver | London Interbank Offered Rate (LIBOR)        
Long-term Debt, by Current and Noncurrent [Abstract]        
Index rate or LIBOR plus (as a percent)       1.625%