Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net income attributable to Tempur Sealy International, Inc.	$ 76.3	$ 85.3
Denominator:
Denominator for basic earnings per common share-weighted average shares (in shares)	173.6	172.0
Effect of dilutive securities (in shares)	4.4	4.8
Denominator for diluted earnings per common share-adjusted weighted average shares (in shares)	178.0	176.8
Basic earnings per common share (in dollars per share)	$ 0.44	$ 0.50
Diluted earnings per common share (in dollars per share)	$ 0.43	$ 0.48
Shares excluded from diluted earnings per common share computation as anti-dilutive (in shares)		0.6