Earnings Per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Net income attributable to Tempur Sealy International, Inc.	$ 27.5	$ 40.2	$ (1.6)	$ 12.5	$ 23.5	$ (2.0)	$ 29.1	$ 56.2	$ 78.6	$ 106.8	$ 219.6
Numerator [Abstract]
Net income									$ 78.9	$ 106.8	$ 219.6
Denominator [Abstract]
Denominator for basic earnings per common share-weighted average shares (in shares)									60.3	61.5	67.1
Effect of dilutive securities [Abstract]
Employee stock-based compensation (in shares)									1.3	1.4	2.0
Denominator for diluted earnings per common share-adjusted weighted average shares (in shares)									61.6	62.9	69.1
Basic earnings per common share (in dollars per share)	$ 0.45	$ 0.66	$ (0.03)	$ 0.21	$ 0.39	$ (0.03)	$ 0.46	$ 0.88	$ 1.30	$ 1.74	$ 3.27
Diluted earnings per common share (in dollars per share)	$ 0.45	$ 0.65	$ (0.03)	$ 0.20	$ 0.39	$ (0.03)	$ 0.45	$ 0.86	$ 1.28	$ 1.70	$ 3.18
Shares excluded from diluted earnings per common share computation as anti-dilutive (in shares)									0.30	0.20	0.01