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Debt (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Jul. 14, 2016
May 24, 2016
Long-term Debt, by Current and Noncurrent [Abstract]                
Total debt $ 1,696,000,000     $ 1,696,000,000   $ 1,479,600,000    
Less: deferred financing costs (10,900,000)     (10,900,000)   (24,800,000)    
Total debt, net 1,685,100,000     1,685,100,000   1,454,800,000    
Less: current portion (66,100,000)     (66,100,000)   (181,500,000)    
Total long-term debt, net 1,619,000,000     1,619,000,000   1,273,300,000    
Line of Credit Facility [Abstract]                
Maximum borrowing capacity 350,000,000.0     350,000,000.0        
Loss on extinguishment of debt 0   $ 0 47,200,000 $ 0      
Write off of deferred financing costs 11,000,000              
2026 Senior Notes                
Long-term Debt, by Current and Noncurrent [Abstract]                
Senior notes $ 600,000,000     $ 600,000,000   0   $ 600,000,000
Less: deferred financing costs   $ (3,100,000)            
Stated percentage 5.50%     5.50%       5.50%
Line of Credit Facility [Abstract]                
Debt instrument, amortization period, deferred financing costs (in years)   10 years            
Loss on extinguishment of debt   $ 5,900,000            
2023 Senior Notes                
Long-term Debt, by Current and Noncurrent [Abstract]                
Senior notes $ 450,000,000.0     $ 450,000,000.0   $ 450,000,000    
Stated percentage 5.625%     5.625%   5.625%    
2020 Senior Notes                
Long-term Debt, by Current and Noncurrent [Abstract]                
Senior notes $ 0     $ 0   $ 375,000,000.0   $ 375,000,000
Stated percentage           6.875%   6.875%
Line of Credit Facility [Abstract]                
Loss on extinguishment of debt   23,600,000            
Write off of deferred financing costs   4,800,000            
Sealy notes                
Long-term Debt, by Current and Noncurrent [Abstract]                
8.0% Sealy Notes $ 0     $ 0   $ 111,100,000    
Stated percentage 8.00%   8.00% 8.00% 8.00% 8.00% 8.00%  
Capital lease obligations and other                
Long-term Debt, by Current and Noncurrent [Abstract]                
Capital lease obligations and other $ 53,500,000     $ 53,500,000   $ 34,000,000    
2016 Credit Agreement                
Long-term Debt, by Current and Noncurrent [Abstract]                
Less: deferred financing costs   $ (3,600,000)            
Line of Credit Facility [Abstract]                
Debt instrument, amortization period, deferred financing costs (in years)   5 years            
Loss on extinguishment of debt   $ 1,900,000            
2016 Credit Agreement | Term A Facility                
Long-term Debt, by Current and Noncurrent [Abstract]                
Line of credit 592,500,000     $ 592,500,000   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)       1.50%        
2012 Credit Agreement | Term A Facility                
Long-term Debt, by Current and Noncurrent [Abstract]                
Line of credit 0     $ 0   $ 409,400,000    
Line of Credit Facility [Abstract]                
Maximum borrowing capacity 550,000,000.0     550,000,000.0        
2012 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)           2.00%    
2012 Credit Agreement | Term B Facility                
Long-term Debt, by Current and Noncurrent [Abstract]                
Line of credit 0     0   $ 100,100,000    
Line of Credit Facility [Abstract]                
Maximum borrowing capacity 870,000,000.0     870,000,000.0        
2012 Credit Agreement | Term B Facility | London Interbank Offered Rate (LIBOR)                
Long-term Debt, by Current and Noncurrent [Abstract]                
Index rate or LIBOR plus (as a percent)           2.75%    
Interest rate floor (as a percent)           0.75%    
Line of Credit | 2016 Credit Agreement                
Line of Credit Facility [Abstract]                
Maximum borrowing capacity 500,000,000.0     500,000,000.0        
Line of credit facility, incremental amount available 500,000,000     500,000,000        
Maximum borrowing capacity available in other currencies 250,000,000.0     250,000,000.0        
Line of credit facility, capacity available for issuance of letters of credit 100,000,000     100,000,000        
Line of credit facility, capacity available for swing line loans $ 50,000,000.0     $ 50,000,000.0        
Equity interest of subsidiary guarantor (as a percent) 100.00%     100.00%        
Equity voting rights of subsidiary (as a percent) 65.00%     65.00%        
Domestic qualified cash excluded (in hundredths) 100.00%     100.00%        
Foreign qualified cash excluded (in hundredths) 60.00%     60.00%        
Domestic and foreign qualified cash exclusions, maximum $ 150,000,000.0     $ 150,000,000.0        
Domestic qualified cash 33,800,000     33,800,000        
Foreign qualified cash 33,100,000     $ 33,100,000        
Commitment Fee Percentage       0.25%        
Line of Credit | 2016 Credit Agreement | London Interbank Offered Rate (LIBOR)                
Long-term Debt, by Current and Noncurrent [Abstract]                
Index rate or LIBOR plus (as a percent)       1.50%        
Line of Credit | 2016 Credit Agreement | Base Rate                
Long-term Debt, by Current and Noncurrent [Abstract]                
Index rate or LIBOR plus (as a percent)       0.50%        
Line of Credit | 2016 Credit Agreement | Term Loan Facility                
Line of Credit Facility [Abstract]                
Maximum borrowing capacity 500,000,000.0     $ 500,000,000.0        
Line of Credit | 2016 Credit Agreement | Delayed Draw Term Loan Facility                
Line of Credit Facility [Abstract]                
Maximum borrowing capacity $ 100,000,000.0     $ 100,000,000.0