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Business Combination (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
0 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Mar. 18, 2013
Sealy [Member]
Jun. 30, 2013
Sealy [Member]
Jun. 30, 2014
Sealy [Member]
Jun. 30, 2013
Sealy [Member]
Mar. 18, 2013
Contractual or Distributer Relationships [Member]
Sealy [Member]
Mar. 18, 2013
Developed Technology Rights [Member]
Sealy [Member]
Mar. 18, 2013
Database Rights [Member]
Sealy [Member]
Mar. 18, 2013
Trade Names [Member]
Sealy [Member]
Business Acquisition [Line Items]                    
Conversion price per share of Sealy common stock issued and outstanding (in dollars per share)     $ 2.20              
Direct transaction costs       $ 5.4   $ 17.2        
Incremental interest expense           19.9        
Components of the final purchase price allocation:                    
Accounts receivable, net     185.0              
Inventory     75.1              
Prepaid expenses and other current assets     23.4              
Accounts payable     (77.9)              
Accrued expenses     (140.0)              
Property, plant and equipment     242.1              
Other assets     32.6              
Identifiable Intangible Assets [Abstract]                    
Intangible assets not amortizable                   521.2
Intangible assets, amortizable             91.1 87.1 3.9 2.3
Deferred income taxes, net     (231.2)              
Sealy 8.0% Notes     (96.2)              
Redeemable non-controlling interest     (11.3)              
Other liabilities     (77.5)              
Goodwill 741.5 759.6 543.2              
Net consideration transferred     1,172.9              
Business acquisition, pro forma information [Abstract]                    
Net sales         1,416.9 1,343.6        
Net income         $ 25.2 $ 19.1        
Earnings from continuing operations per common share - Diluted         $ 0.41 $ 0.31