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Income Taxes - Additional Information (Details)
DKK in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2015
DKK
Dec. 31, 2014
DKK
Dec. 31, 2013
USD ($)
Income Tax Examination [Line Items]            
Tax recognized on repatriation of earnings in connection with Sealy Acquisition     $ 48.1      
Tax benefit recorded on repatriation of earnings   $ 63.9        
Uncertain tax liability $ 69.8 47.6       $ 26.1
Valuation allowance $ 24.2 21.7        
Danish Tax Authority            
Income Tax Examination [Line Items]            
Royalty rate assessed on Danish earnings (percentage) 20.00%          
Cumulative Assessment Amount Including Interest And Penalties $ 199.6 215.1   DKK 1,363.1 DKK 1,317.2  
Increase in tax liability due to the accrual of additional interest | DKK       DKK 45.9    
VAT Taxes Withheld by Tax Authority 26.0 15.0        
Increase in uncertain tax liability 60.7          
Uncertain tax liability 79.6 $ 18.9        
Valuation Allowance, Operating Loss Carryforwards | US State            
Income Tax Examination [Line Items]            
Valuation allowance 87.0          
Valuation Allowance, Tax Credit Carryforward | US State            
Income Tax Examination [Line Items]            
Valuation allowance 3.6          
Valuation Allowance, Tax Credit Carryforward | US Federal            
Income Tax Examination [Line Items]            
Valuation allowance $ 7.8