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Acquisitions and Divestitures (Details)
$ in Millions
 3 Months Ended 6 Months Ended
May. 06, 2015
USD ($)
Jul. 01, 2014
USD ($)
Jun. 30, 2014
USD ($)
facility
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Proceeds from disposition of business and other           $ 7.2 $ 46.3
Japanese Third Party              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Acquisition cost   $ 8.5          
Portland Manufacturing Facility              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Proceeds from disposition of business and other $ 7.2            
Gain (loss) on disposal       $ 0.4   $ (0.4)  
U.S. Innerspring              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Gain (loss) on disposal         $ (20.4)   (20.4)
Number of divestitures | facility     3        
Total consideration     $ 47.8   47.8   47.8
Noncash consideration     1.5   1.5   1.5
Assets of disposal group     66.8   66.8   66.8
Transaction costs     $ 1.4   $ 1.4   $ 1.4