Guarantor/Non-Guarantor Financial Information - Schedule of Supplemental Condensed Consolidating Statements of Income and Comprehensive Income (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	May 24, 2016	Sep. 24, 2015	Dec. 19, 2012
Supplemental condensed consolidating statements of operations
Net sales	$ 769,500,000	$ 832,400,000	$ 804,400,000	$ 721,000,000	$ 767,300,000	$ 880,000,000	$ 764,400,000	$ 739,500,000	$ 3,127,300,000	$ 3,151,200,000	$ 2,989,800,000
Cost of sales									1,817,900,000	1,902,300,000	1,839,400,000
Gross profit	319,400,000	362,100,000	336,900,000	291,000,000	313,100,000	359,600,000	297,500,000	278,700,000	1,309,400,000	1,248,900,000	1,150,400,000
Selling and marketing expenses									648,500,000	648,000,000	619,900,000
General, administrative and other expenses									278,200,000	322,000,000	280,600,000
Equity income in earnings of unconsolidated affiliates									(13,300,000)	(11,900,000)	(8,300,000)
Royalty income, net of royalty expense									(19,500,000)	(18,300,000)	(18,100,000)
Operating (loss) income	107,500,000	131,100,000	100,200,000	76,700,000	91,800,000	110,900,000	52,000,000	54,400,000	415,500,000	309,100,000	276,300,000
Other expense, net:
Interest expense, net									85,200,000	96,100,000	91,900,000
Loss on extinguishment of debt			47,200,000						47,200,000	0	0
Loss on disposal, net									0	0	23,200,000
Other (income) expense, net									(200,000)	12,900,000	(13,700,000)
Total other expense									132,200,000	109,000,000	101,400,000
Income before income taxes									283,300,000	200,100,000	174,900,000
Income tax benefit (provision)									(86,800,000)	(125,400,000)	(64,900,000)
Net income before non-controlling interests									196,500,000	74,700,000	110,000,000
Less: net (loss) income attributable to non-controlling interests									(800,000)
Net income attributable to Tempur Sealy International, Inc.	63,400,000	$ 77,800,000	21,300,000	$ 39,600,000	(11,300,000)	$ 40,200,000	$ 21,200,000	$ 23,400,000	202,100,000	73,500,000	108,900,000
Comprehensive income									190,800,000	19,100,000	66,900,000
Tempur Sealy International, Inc. (Ultimate Parent)
Other expense, net:
Loss on extinguishment of debt									34,300,000
Combined Guarantor Subsidiaries
Other expense, net:
Loss on extinguishment of debt									12,900,000
Combined Non-Guarantor Subsidiaries
Other expense, net:
Loss on extinguishment of debt									0
Consolidated
Supplemental condensed consolidating statements of operations
Net sales									3,127,300,000	3,151,200,000	2,989,800,000
Cost of sales									1,817,900,000	1,902,300,000	1,839,400,000
Gross profit									1,309,400,000	1,248,900,000	1,150,400,000
Selling and marketing expenses									648,500,000	648,000,000	619,900,000
General, administrative and other expenses									278,200,000	322,000,000	280,600,000
Equity income in earnings of unconsolidated affiliates									(13,300,000)	(11,900,000)	(8,300,000)
Royalty income, net of royalty expense									(19,500,000)	(18,300,000)	(18,100,000)
Operating (loss) income									415,500,000	309,100,000	276,300,000
Other expense, net:
Third party interest expense, net									85,200,000	96,100,000	91,900,000
Intercompany interest (income) expense, net									0	0	0
Interest expense, net									85,200,000	96,100,000	91,900,000
Loss on disposal, net											23,200,000
Other (income) expense, net									(200,000)	12,900,000	(13,700,000)
Total other expense									132,200,000	109,000,000	101,400,000
Income from equity investees									0	0	0
Income before income taxes									283,300,000	200,100,000	174,900,000
Income tax benefit (provision)									(86,800,000)	(125,400,000)	(64,900,000)
Net income before non-controlling interests									196,500,000	74,700,000	110,000,000
Less: net (loss) income attributable to non-controlling interests									(5,600,000)	1,200,000	1,100,000
Net income attributable to Tempur Sealy International, Inc.									202,100,000	73,500,000	108,900,000
Comprehensive income									190,800,000	19,100,000	66,900,000
2023 Senior Notes
Guarantor/non-guarantor financial information
Senior notes, noncurrent	450,000,000.0				450,000,000				450,000,000.0	450,000,000			$ 450,000,000.0
2026 Senior Notes
Guarantor/non-guarantor financial information
Senior notes, noncurrent	600,000,000.0				0				600,000,000.0	0		$ 600,000,000.0
Other expense, net:
Loss on extinguishment of debt			$ 5,900,000
2020 Senior Notes
Guarantor/non-guarantor financial information
Senior notes, noncurrent	$ 375,000,000.0				$ 375,000,000				375,000,000.0	375,000,000				$ 375,000,000.0
Other expense, net:
Loss on extinguishment of debt									23,600,000
Reportable Legal Entities | Tempur Sealy International, Inc. (Ultimate Parent)
Supplemental condensed consolidating statements of operations
Net sales									0	0	0
Cost of sales									0	0	0
Gross profit									0	0	0
Selling and marketing expenses									2,900,000	4,100,000	2,400,000
General, administrative and other expenses									14,800,000	20,800,000	13,400,000
Equity income in earnings of unconsolidated affiliates									0	0	0
Royalty income, net of royalty expense									0	0	0
Operating (loss) income									(17,700,000)	(24,900,000)	(15,800,000)
Other expense, net:
Third party interest expense, net									66,000,000	27,200,000	27,000,000
Intercompany interest (income) expense, net									(4,100,000)	32,900,000	32,700,000
Interest expense, net									61,900,000	60,100,000	59,700,000
Loss on disposal, net											0
Other (income) expense, net									0	0	0
Total other expense									96,200,000	60,100,000	59,700,000
Income from equity investees									271,600,000	132,900,000	159,200,000
Income before income taxes									157,700,000	47,900,000	83,700,000
Income tax benefit (provision)									38,800,000	26,800,000	26,300,000
Net income before non-controlling interests									196,500,000	74,700,000	110,000,000
Less: net (loss) income attributable to non-controlling interests									(5,600,000)	1,200,000	1,100,000
Net income attributable to Tempur Sealy International, Inc.									202,100,000	73,500,000	108,900,000
Comprehensive income									190,800,000	19,100,000	66,900,000
Reportable Legal Entities | Combined Guarantor Subsidiaries
Supplemental condensed consolidating statements of operations
Net sales									2,355,900,000	2,422,900,000	2,229,500,000
Cost of sales									1,409,400,000	1,532,600,000	1,465,300,000
Gross profit									946,500,000	890,300,000	764,200,000
Selling and marketing expenses									458,600,000	460,100,000	431,200,000
General, administrative and other expenses									186,800,000	232,600,000	200,500,000
Equity income in earnings of unconsolidated affiliates									0	0	0
Royalty income, net of royalty expense									(19,500,000)	(18,300,000)	(18,100,000)
Operating (loss) income									320,600,000	215,900,000	150,600,000
Other expense, net:
Third party interest expense, net									15,400,000	66,200,000	62,400,000
Intercompany interest (income) expense, net									(100,000)	(35,500,000)	(34,600,000)
Interest expense, net									15,300,000	30,700,000	27,800,000
Loss on disposal, net											23,200,000
Other (income) expense, net									(1,400,000)	(8,100,000)	(17,200,000)
Total other expense									26,800,000	22,600,000	33,800,000
Income from equity investees									76,800,000	64,700,000	98,700,000
Income before income taxes									370,600,000	258,000,000	215,500,000
Income tax benefit (provision)									(99,000,000)	(125,100,000)	(56,300,000)
Net income before non-controlling interests									271,600,000	132,900,000	159,200,000
Less: net (loss) income attributable to non-controlling interests									0	1,200,000	1,100,000
Net income attributable to Tempur Sealy International, Inc.									271,600,000	131,700,000	158,100,000
Comprehensive income									271,700,000	130,900,000	163,300,000
Reportable Legal Entities | Combined Non-Guarantor Subsidiaries
Supplemental condensed consolidating statements of operations
Net sales									835,900,000	778,900,000	802,900,000
Cost of sales									473,000,000	420,300,000	416,700,000
Gross profit									362,900,000	358,600,000	386,200,000
Selling and marketing expenses									187,000,000	183,800,000	186,300,000
General, administrative and other expenses									76,600,000	68,600,000	66,700,000
Equity income in earnings of unconsolidated affiliates									(13,300,000)	(11,900,000)	(8,300,000)
Royalty income, net of royalty expense									0	0	0
Operating (loss) income									112,600,000	118,100,000	141,500,000
Other expense, net:
Third party interest expense, net									3,800,000	2,700,000	2,500,000
Intercompany interest (income) expense, net									4,200,000	2,600,000	1,900,000
Interest expense, net									8,000,000	5,300,000	4,400,000
Loss on disposal, net											0
Other (income) expense, net									1,200,000	21,000,000	3,500,000
Total other expense									9,200,000	26,300,000	7,900,000
Income from equity investees									0	0	0
Income before income taxes									103,400,000	91,800,000	133,600,000
Income tax benefit (provision)									(26,600,000)	(27,100,000)	(34,900,000)
Net income before non-controlling interests									76,800,000	64,700,000	98,700,000
Less: net (loss) income attributable to non-controlling interests									(5,600,000)	0	0
Net income attributable to Tempur Sealy International, Inc.									82,400,000	64,700,000	98,700,000
Comprehensive income									71,200,000	(3,300,000)	60,300,000
Eliminations
Supplemental condensed consolidating statements of operations
Net sales									(64,500,000)	(50,600,000)	(42,600,000)
Cost of sales									(64,500,000)	(50,600,000)	(42,600,000)
Gross profit									0	0	0
Selling and marketing expenses									0	0	0
General, administrative and other expenses									0	0	0
Equity income in earnings of unconsolidated affiliates									0	0	0
Royalty income, net of royalty expense									0	0	0
Operating (loss) income									0	0	0
Other expense, net:
Third party interest expense, net									0	0	0
Intercompany interest (income) expense, net									0	0	0
Interest expense, net									0	0	0
Loss on extinguishment of debt									0
Loss on disposal, net											0
Other (income) expense, net									0	0	0
Total other expense									0	0	0
Income from equity investees									(348,400,000)	(197,600,000)	(257,900,000)
Income before income taxes									(348,400,000)	(197,600,000)	(257,900,000)
Income tax benefit (provision)									0	0	0
Net income before non-controlling interests									(348,400,000)	(197,600,000)	(257,900,000)
Less: net (loss) income attributable to non-controlling interests									5,600,000	(1,200,000)	(1,100,000)
Net income attributable to Tempur Sealy International, Inc.									(354,000,000)	(196,400,000)	(256,800,000)
Comprehensive income									$ (342,900,000)	$ (127,600,000)	$ (223,600,000)