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Goodwill (Details)
$ in Millions
 9 Months Ended
Sep. 30, 2015
USD ($)
reporting_unit
Goodwill [Roll Forward]  
Beginning balance $ 736.5
Foreign currency translation adjustments and other (23.8)
Ending balance $ 712.7
North America  
Goodwill [Line Items]  
Number of Reporting Units | reporting_unit 3
International  
Goodwill [Line Items]  
Number of Reporting Units | reporting_unit 1
Sealy  
Goodwill [Roll Forward]  
Beginning balance $ 521.9
Operating Segments | North America  
Goodwill [Roll Forward]  
Beginning balance 574.5
Foreign currency translation adjustments and other (9.5)
Ending balance 565.0
Operating Segments | International  
Goodwill [Roll Forward]  
Beginning balance 162.0
Foreign currency translation adjustments and other (14.3)
Ending balance 147.7
Operating Segments | Scenario, Previously Reported | North America  
Goodwill [Roll Forward]  
Beginning balance 106.2
Operating Segments | Scenario, Previously Reported | International  
Goodwill [Roll Forward]  
Beginning balance 108.4
Operating Segments | Restatement Adjustment | North America  
Goodwill [Roll Forward]  
Beginning balance 468.3
Operating Segments | Restatement Adjustment | International  
Goodwill [Roll Forward]  
Beginning balance $ 53.6