CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 140.7	$ 185.0	$ 65.7
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	29.1	(0.3)	(52.7)
Net change in unrecognized gain on interest rate swap, net of tax	0.0	0.0	0.7
Net change in pension benefits, net of tax	(0.5)	(0.8)	1.0
Unrealized (loss) income on cash flow hedging derivatives, net of tax	(0.6)	(6.0)	5.3
Other comprehensive income (loss), net of tax	28.0	(7.1)	(45.7)
Comprehensive income	168.7	177.9	20.0
Less: Comprehensive (loss) income attributable to non-controlling interests	(10.7)	(5.6)	1.2
Comprehensive income attributable to Tempur Sealy International, Inc.	$ 179.4	$ 183.5	$ 18.8