CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income before non-controlling interests	$ 349.8	$ 189.4	$ 97.6
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	23.6	9.5	(18.9)
Net change in pension benefits, net of tax	(1.4)	(1.9)	(0.9)
Other comprehensive income (loss), net of tax	22.2	7.6	(19.8)
Comprehensive income	372.0	197.0	77.8
Less: Comprehensive income (loss) attributable to non-controlling interests	1.0	(0.1)	(2.9)
Comprehensive income attributable to Tempur Sealy International, Inc.	$ 371.0	$ 197.1	$ 80.7