Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net income attributable to Tempur Sealy International, Inc.	$ 85.3	$ 130.7
Denominator:
Denominator for basic earnings per common share-weighted average shares (in shares)	172.0	182.6
Effect of dilutive securities (in shares)	4.8	5.9
Denominator for diluted earnings per common share-adjusted weighted average shares (in shares)	176.8	188.5
Basic earnings per common share (in dollars per share)	$ 0.50	$ 0.72
Diluted earnings per common share (in dollars per share)	$ 0.48	$ 0.69
Shares excluded from diluted earnings per common share computation as anti-dilutive (in shares)	0.6	0.4