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Earnings Per Common Share (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Numerator [Abstract]        
Net (loss) income attributable to Tempur Sealy International, Inc. $ (2.2) $ (1.6) $ 25.2 $ 10.9
Denominator [Abstract]        
Denominator for basic earnings per common share-weighted average shares (in shares) 60.8 60.4 60.8 60.2
Effect of dilutive securities [Abstract]        
Employee stock-based compensation (in shares) 0 0 1.1 1.3
Denominator for diluted earnings per common share-adjusted weighted average shares (in shares) 60.8 60.4 61.9 61.5
Basic earnings per common share (in dollars per share) $ (0.04) $ (0.03) $ 0.41 $ 0.18
Diluted earnings per common share (in dollars per share) $ (0.04) $ (0.03) $ 0.41 $ 0.18
Shares excluded from diluted earnings per common share computation as anti-dilutive (in shares)     0.3 0.4