CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 1,358.3	$ 1,132.3	$ 3,571.2	$ 2,619.9
Cost of sales	781.2	602.1	2,017.0	1,466.7
Gross profit	577.1	530.2	1,554.2	1,153.2
Selling and marketing expenses	243.8	229.7	658.3	535.8
General, administrative and other expenses	90.3	125.1	254.9	288.1
Equity income in earnings of unconsolidated affiliates	(6.8)	(4.8)	(20.5)	(9.6)
Operating income	249.8	180.2	661.5	338.9
Other expense, net:
Interest expense, net	13.5	20.1	45.8	61.0
Loss on extinguishment of debt	0.0	0.9	23.0	0.9
Other expense (income), net	0.1	(0.5)	(0.3)	0.3
Total other expense, net	13.6	20.5	68.5	62.2
Income from continuing operations before income taxes	236.2	159.7	593.0	276.7
Income tax provision	(58.7)	(40.3)	(143.9)	(73.2)
Income from continuing operations	177.5	119.4	449.1	203.5
(Loss) income from discontinued operations, net of tax	(0.1)	2.4	(0.6)	1.3
Net income before non-controlling interests	177.4	121.8	448.5	204.8
Less: Net income (loss) attributable to non-controlling interests	0.0	0.4	(0.2)	0.7
Net income attributable to Tempur Sealy International, Inc.	$ 177.4	$ 121.4	$ 448.7	$ 204.1
Basic
Earnings per share for continuing operations (in dollars per share)	$ 0.91	$ 0.58	$ 2.26	$ 0.97
Earnings per share for discontinued operations (in dollars per share)	0	0.01	0	0.01
Earnings per share (in dollars per share)	0.91	0.59	2.26	0.98
Diluted
Earnings per share for continuing operations (in dollars per share)	0.87	0.56	2.18	0.96
Earnings per share for discontinued operations (in dollars per share)	0	0.01	0	0.01
Earnings per share (in dollars per share)	$ 0.87	$ 0.57	$ 2.18	$ 0.97
Weighted average common shares outstanding:
Basic (in shares)	195.8	206.4	198.9	208.8
Diluted (in shares)	203.4	211.6	205.9	211.6