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Summary of Significant Accounting Policies - Additional Information (Details)
 12 Months Ended
Dec. 31, 2015
USD ($)
channel
facility
shares
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Feb. 01, 2016
USD ($)
Business Acquisition [Line Items]        
Number of products sales channels | channel 2      
Noncontrolling interest, ownership percentage by parent 100.00%      
Depreciation expense $ 53,500,000 $ 57,700,000 $ 59,400,000  
Product warranty accrual, current 14,900,000 16,100,000    
Product warranty accrual, noncurrent 14,700,000 15,200,000    
Allowance for doubtful accounts included in accounts receivable, net 23,300,000 19,500,000    
Shipping and handling included in net sales 11,100,000 14,700,000 12,500,000  
Shipping and handling included in cost of sales 161,600,000 169,200,000 142,500,000  
Other income, net of expense 9,500,000 15,600,000 0  
Advertising costs charged to expense 360,500,000 326,700,000 274,200,000  
Advertising costs deferred and included in Prepaid expenses and other current assets 13,700,000 9,700,000    
Research and development costs charged to expense 28,700,000 21,600,000 21,000,000  
Royalty revenue, net of royalty expense $ 18,300,000 18,100,000 $ 13,700,000  
Treasury stock sold (in shares) | shares 69,686      
Proceeds from issuance of treasury shares $ 5,000,000      
Self insurance reserve, excess loss coverage per claim per year 800,000      
Self insurance reserve, current 6,600,000 4,800,000    
Self insurance reserve, noncurrent $ 11,500,000 $ 10,000,000    
Number of active plants | facility 2      
Number of previously closed US facilities | facility 9      
Term of supply agreements, minimum 2 years      
Term of supply agreements, maximum 5 years      
Restructuring expenses $ 13,500,000      
Sealy Canada        
Business Acquisition [Line Items]        
Noncontrolling interest, ownership percentage by parent 100.00%      
Variable Interest Entity, Primary Beneficiary | Comfort Revolution        
Business Acquisition [Line Items]        
Equity method investment, ownership percentage 45.00%      
Subsequent Event        
Business Acquisition [Line Items]        
Amount of shares authorized to be repurchased       $ 200,000,000.0