Guarantor/Non-Guarantor Financial Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Dec. 31, 2017
Supplemental condensed consolidated statements of income and comprehensive income [Abstract]
Net sales	$ 648.0	$ 722.1
Cost of sales	380.1	435.5
Gross profit	267.9	286.6
Selling and marketing expenses	148.9	153.7
General, administrative and other expenses	69.0	66.5
Customer termination charges, net	0.0	14.4
Equity income in earnings of unconsolidated affiliates	(3.9)	(2.7)
Royalty income, net of royalty expense	0.0	(4.8)
Operating income	53.9	59.5
Other expense, net:
Interest expense, net	22.9	22.1
Other (income) expense, net	(1.8)	(9.2)
Total other expense, net	21.1	12.9
Income before income taxes	32.8	46.6
Income tax benefit (provision)	(10.0)	(14.6)
Net income before non-controlling interest	22.8	32.0
Less: Net loss attributable to non-controlling interests	(0.3)	(1.9)
Net income attributable to Tempur Sealy International, Inc.	23.1	33.9
Comprehensive income attributable to Tempur Sealy International, Inc.	27.5	42.2
Current Assets:
Cash and cash equivalents	41.9	65.7	$ 34.5	$ 41.9
Accounts receivable, net			339.4	317.7
Inventories			214.7	183.0
Prepaid expenses and other current assets			71.2	64.8
Total Current Assets			659.8	607.4
Property, plant and equipment, net			436.8	435.1
Goodwill			731.1	733.1
Other intangible assets, net			661.7	667.4
Other non-current assets			235.5	227.4
Total Assets			2,750.0	2,694.0
Current Liabilities:
Accounts payable			248.7	241.2
Accrued expenses and other current liabilities			226.5	234.2
Income taxes payable			28.7	29.1
Current portion of long-term debt			65.6	72.4
Total Current Liabilities			569.5	576.9
Long-term debt, net			1,707.6	1,680.7
Other non-current liabilities			214.9	207.4
Total Liabilities			2,605.5	2,579.3
Redeemable non-controlling interest			1.9	2.2
Total Stockholders' Equity			142.6	112.5
Total Liabilities, Redeemable Non-Controlling Interest and Stockholders' Equity			2,750.0	2,694.0
Supplemental condensed consolidated statements of cash flows [Abstract]
Net cash provided by (used in) operating activities	(9.7)	67.2
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(21.8)	(12.9)
Other	(4.2)	0.9
Net cash used in investing activities	(17.6)	(12.0)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	417.1	302.9
Repayments of borrowings under long-term debt obligations	(394.8)	(331.8)
Proceeds from exercise of stock options	1.9	0.1
Treasury stock repurchased	(2.9)	(43.8)
Other	(1.8)	(3.4)
Net cash used in financing activities	19.5	(76.0)
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0.4	(2.4)
Decrease in cash and cash equivalents	(7.4)	(23.2)
CASH AND CASH EQUIVALENTS, beginning of period	41.9	65.7
CASH AND CASH EQUIVALENTS, end of period	34.5	42.5
Consolidated
Supplemental condensed consolidated statements of income and comprehensive income [Abstract]
Net sales	648.0	722.1
Cost of sales	380.1	435.5
Gross profit	267.9	286.6
Selling and marketing expenses	148.9	153.7
General, administrative and other expenses	69.0	66.5
Customer termination charges, net		14.4
Equity income in earnings of unconsolidated affiliates	(3.9)	(2.7)
Royalty income, net of royalty expense		(4.8)
Operating income	53.9	59.5
Other expense, net:
Third party interest expense, net	22.9	22.1
Intercompany interest (income) expense, net	0.0	0.0
Interest expense, net	22.9	22.1
Other (income) expense, net	(1.8)	(9.2)
Total other expense, net	21.1	12.9
Income from equity investees	0.0	0.0
Income before income taxes	32.8	46.6
Income tax benefit (provision)	(10.0)	(14.6)
Net income before non-controlling interest	22.8	32.0
Less: Net loss attributable to non-controlling interests	(0.3)	(1.9)
Net income attributable to Tempur Sealy International, Inc.	23.1	33.9
Comprehensive income attributable to Tempur Sealy International, Inc.	27.5	42.2
Current Assets:
Cash and cash equivalents	41.9	65.7	34.5	41.9
Accounts receivable, net			339.4	317.7
Inventories			214.7	183.0
Income taxes receivable			0.0	0.0
Prepaid expenses and other current assets			71.2	64.8
Total Current Assets			659.8	607.4
Property, plant and equipment, net			436.8	435.1
Goodwill			731.1	733.1
Other intangible assets, net			661.7	667.4
Deferred income taxes			25.1	23.6
Other non-current assets			235.5	227.4
Net investment in subsidiaries			0.0	0.0
Due from affiliates			0.0	0.0
Total Assets			2,750.0	2,694.0
Current Liabilities:
Accounts payable			248.7	241.2
Accrued expenses and other current liabilities			226.5	234.2
Income taxes payable			28.7	29.1
Current portion of long-term debt			65.6	72.4
Total Current Liabilities			569.5	576.9
Long-term debt, net			1,707.6	1,680.7
Deferred income taxes			113.5	114.3
Other non-current liabilities			214.9	207.4
Due to affiliates			0.0	0.0
Total Liabilities			2,605.5	2,579.3
Redeemable non-controlling interest			1.9	2.2
Total Stockholders' Equity			142.6	112.5
Total Liabilities, Redeemable Non-Controlling Interest and Stockholders' Equity			2,750.0	2,694.0
Supplemental condensed consolidated statements of cash flows [Abstract]
Net cash provided by (used in) operating activities	(9.7)	67.2
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(21.8)	(12.9)
Other	0.0
Other	4.2	0.9
Net cash used in investing activities	(17.6)	(12.0)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	417.1	302.9
Repayments of borrowings under long-term debt obligations	(394.8)	(331.8)
Net activity in investment in and advances (to) from subsidiaries and affiliates	0.0	0.0
Proceeds from issuance of treasury shares	1.9
Proceeds from exercise of stock options		0.1
Treasury stock repurchased	(2.9)	(43.8)
Other	(1.8)	(3.4)
Net cash used in financing activities	19.5	(76.0)
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0.4	(2.4)
Decrease in cash and cash equivalents	(7.4)	(23.2)
CASH AND CASH EQUIVALENTS, beginning of period	41.9	65.7
CASH AND CASH EQUIVALENTS, end of period	34.5	42.5
Reportable Legal Entities | Tempur Sealy International, Inc. (Ultimate Parent)
Supplemental condensed consolidated statements of income and comprehensive income [Abstract]
Net sales	0.0	0.0
Cost of sales	0.0	0.0
Gross profit	0.0	0.0
Selling and marketing expenses	1.9	1.4
General, administrative and other expenses	4.7	4.0
Customer termination charges, net		(8.4)
Equity income in earnings of unconsolidated affiliates	0.0	0.0
Royalty income, net of royalty expense		0.0
Operating income	(6.6)	3.0
Other expense, net:
Third party interest expense, net	14.9	14.9
Intercompany interest (income) expense, net	(1.8)	(1.2)
Interest expense, net	13.1	13.7
Other (income) expense, net	0.0	0.0
Total other expense, net	13.1	13.7
Income from equity investees	39.1	40.6
Income before income taxes	19.4	29.9
Income tax benefit (provision)	3.4	2.1
Net income before non-controlling interest	22.8	32.0
Less: Net loss attributable to non-controlling interests	(0.3)	(1.9)
Net income attributable to Tempur Sealy International, Inc.	23.1	33.9
Comprehensive income attributable to Tempur Sealy International, Inc.	27.5	42.2
Current Assets:
Cash and cash equivalents	0.1	0.0	0.0	0.1
Accounts receivable, net			0.0	0.0
Inventories			0.0	0.0
Income taxes receivable			264.4	260.2
Prepaid expenses and other current assets			0.6	0.8
Total Current Assets			265.0	261.1
Property, plant and equipment, net			0.0	0.0
Goodwill			0.0	0.0
Other intangible assets, net			0.0	0.0
Deferred income taxes			11.1	11.8
Other non-current assets			0.0	0.0
Net investment in subsidiaries			544.9	2,381.0
Due from affiliates			432.8	87.2
Total Assets			1,253.8	2,741.1
Current Liabilities:
Accounts payable			0.0	0.0
Accrued expenses and other current liabilities			21.4	7.6
Income taxes payable			0.0	0.0
Current portion of long-term debt			0.0	0.0
Total Current Liabilities			21.4	7.6
Long-term debt, net			1,042.0	1,041.6
Deferred income taxes			0.0	0.0
Other non-current liabilities			0.0	0.0
Due to affiliates			45.9	1,577.2
Total Liabilities			1,109.3	2,626.4
Redeemable non-controlling interest			1.9	2.2
Total Stockholders' Equity			142.6	112.5
Total Liabilities, Redeemable Non-Controlling Interest and Stockholders' Equity			1,253.8	2,741.1
Supplemental condensed consolidated statements of cash flows [Abstract]
Net cash provided by (used in) operating activities	1.0	0.1
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	0.0	0.0
Other	0.0
Other	0.0	0.0
Net cash used in investing activities	0.0	0.0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	0.0	0.0
Repayments of borrowings under long-term debt obligations	0.0	0.0
Net activity in investment in and advances (to) from subsidiaries and affiliates	(0.1)	43.6
Proceeds from issuance of treasury shares	1.9
Proceeds from exercise of stock options		0.1
Treasury stock repurchased	(2.9)	(43.8)
Other	0.0	0.0
Net cash used in financing activities	(1.1)	(0.1)
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0.0	0.0
Decrease in cash and cash equivalents	(0.1)	0.0
CASH AND CASH EQUIVALENTS, beginning of period	0.1	0.0
CASH AND CASH EQUIVALENTS, end of period	0.0	0.0
Reportable Legal Entities | Combined Guarantor Subsidiaries
Supplemental condensed consolidated statements of income and comprehensive income [Abstract]
Net sales	440.7	529.8
Cost of sales	266.4	330.3
Gross profit	174.3	199.5
Selling and marketing expenses	93.1	104.9
General, administrative and other expenses	47.5	44.3
Customer termination charges, net		21.8
Equity income in earnings of unconsolidated affiliates	0.0	0.0
Royalty income, net of royalty expense		(4.8)
Operating income	33.7	33.3
Other expense, net:
Third party interest expense, net	6.9	6.5
Intercompany interest (income) expense, net	1.8	(0.3)
Interest expense, net	8.7	6.2
Other (income) expense, net	(2.2)	(9.3)
Total other expense, net	6.5	(3.1)
Income from equity investees	19.0	15.6
Income before income taxes	46.2	52.0
Income tax benefit (provision)	(7.1)	(11.4)
Net income before non-controlling interest	39.1	40.6
Less: Net loss attributable to non-controlling interests	0.0	0.0
Net income attributable to Tempur Sealy International, Inc.	39.1	40.6
Comprehensive income attributable to Tempur Sealy International, Inc.	38.5	36.1
Current Assets:
Cash and cash equivalents	12.3	7.9	7.8	12.3
Accounts receivable, net			5.1	5.1
Inventories			130.3	103.4
Income taxes receivable			0.0	0.0
Prepaid expenses and other current assets			52.8	50.6
Total Current Assets			196.0	171.4
Property, plant and equipment, net			362.7	360.4
Goodwill			507.6	507.6
Other intangible assets, net			574.6	577.5
Deferred income taxes			0.0	0.0
Other non-current assets			44.2	47.2
Net investment in subsidiaries			116.5	127.7
Due from affiliates			131.1	1,975.9
Total Assets			1,932.7	3,767.7
Current Liabilities:
Accounts payable			159.8	174.6
Accrued expenses and other current liabilities			124.4	144.2
Income taxes payable			285.9	279.3
Current portion of long-term debt			35.8	35.7
Total Current Liabilities			605.9	633.8
Long-term debt, net			580.0	589.4
Deferred income taxes			107.1	107.8
Other non-current liabilities			57.7	55.2
Due to affiliates			37.1	0.5
Total Liabilities			1,387.8	1,386.7
Redeemable non-controlling interest			0.0	0.0
Total Stockholders' Equity			544.9	2,381.0
Total Liabilities, Redeemable Non-Controlling Interest and Stockholders' Equity			1,932.7	3,767.7
Supplemental condensed consolidated statements of cash flows [Abstract]
Net cash provided by (used in) operating activities	(18.2)	55.1
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(18.7)	(10.6)
Other	35.2
Other	0.0	0.8
Net cash used in investing activities	16.5	(9.8)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	185.3	251.4
Repayments of borrowings under long-term debt obligations	(191.8)	(278.9)
Net activity in investment in and advances (to) from subsidiaries and affiliates	5.0	(19.0)
Proceeds from issuance of treasury shares	0.0
Proceeds from exercise of stock options		0.0
Treasury stock repurchased	0.0	0.0
Other	(1.3)	(1.1)
Net cash used in financing activities	(2.8)	(47.6)
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0.0	0.0
Decrease in cash and cash equivalents	(4.5)	(2.3)
CASH AND CASH EQUIVALENTS, beginning of period	12.3	7.9
CASH AND CASH EQUIVALENTS, end of period	7.8	5.6
Reportable Legal Entities | Combined Non-Guarantor Subsidiaries
Supplemental condensed consolidated statements of income and comprehensive income [Abstract]
Net sales	224.8	212.7
Cost of sales	131.2	125.6
Gross profit	93.6	87.1
Selling and marketing expenses	53.9	47.4
General, administrative and other expenses	16.8	18.2
Customer termination charges, net		1.0
Equity income in earnings of unconsolidated affiliates	(3.9)	(2.7)
Royalty income, net of royalty expense		0.0
Operating income	26.8	23.2
Other expense, net:
Third party interest expense, net	1.1	0.7
Intercompany interest (income) expense, net	0.0	1.5
Interest expense, net	1.1	2.2
Other (income) expense, net	0.4	0.1
Total other expense, net	1.5	2.3
Income from equity investees	0.0	0.0
Income before income taxes	25.3	20.9
Income tax benefit (provision)	(6.3)	(5.3)
Net income before non-controlling interest	19.0	15.6
Less: Net loss attributable to non-controlling interests	(0.3)	(1.9)
Net income attributable to Tempur Sealy International, Inc.	19.3	17.5
Comprehensive income attributable to Tempur Sealy International, Inc.	24.3	30.4
Current Assets:
Cash and cash equivalents	29.5	57.8	26.7	29.5
Accounts receivable, net			323.2	322.2
Inventories			84.4	79.6
Income taxes receivable			0.0	0.0
Prepaid expenses and other current assets			17.8	13.4
Total Current Assets			452.1	444.7
Property, plant and equipment, net			74.1	74.7
Goodwill			223.5	225.5
Other intangible assets, net			87.1	89.9
Deferred income taxes			25.1	23.6
Other non-current assets			191.3	180.2
Net investment in subsidiaries			0.0	0.0
Due from affiliates			21.2	15.6
Total Assets			1,074.4	1,054.2
Current Liabilities:
Accounts payable			77.8	76.2
Accrued expenses and other current liabilities			80.7	82.4
Income taxes payable			7.2	10.0
Current portion of long-term debt			29.8	36.7
Total Current Liabilities			195.5	205.3
Long-term debt, net			85.6	49.7
Deferred income taxes			17.5	18.3
Other non-current liabilities			157.2	152.2
Due to affiliates			502.1	501.0
Total Liabilities			957.9	926.5
Redeemable non-controlling interest			1.9	2.2
Total Stockholders' Equity			114.6	125.5
Total Liabilities, Redeemable Non-Controlling Interest and Stockholders' Equity			1,074.4	1,054.2
Supplemental condensed consolidated statements of cash flows [Abstract]
Net cash provided by (used in) operating activities	7.5	12.0
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(3.1)	(2.3)
Other	(35.2)
Other	4.2	0.1
Net cash used in investing activities	(34.1)	(2.2)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	231.8	51.5
Repayments of borrowings under long-term debt obligations	(203.0)	(52.9)
Net activity in investment in and advances (to) from subsidiaries and affiliates	(4.9)	(24.6)
Proceeds from issuance of treasury shares	0.0
Proceeds from exercise of stock options		0.0
Treasury stock repurchased	0.0	0.0
Other	(0.5)	(2.3)
Net cash used in financing activities	23.4	(28.3)
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0.4	(2.4)
Decrease in cash and cash equivalents	(2.8)	(20.9)
CASH AND CASH EQUIVALENTS, beginning of period	29.5	57.8
CASH AND CASH EQUIVALENTS, end of period	26.7	36.9
Eliminations
Supplemental condensed consolidated statements of income and comprehensive income [Abstract]
Net sales	(17.5)	(20.4)
Cost of sales	(17.5)	(20.4)
Gross profit	0.0	0.0
Selling and marketing expenses	0.0	0.0
General, administrative and other expenses	0.0	0.0
Equity income in earnings of unconsolidated affiliates	0.0	0.0
Royalty income, net of royalty expense		0.0
Operating income	0.0	0.0
Other expense, net:
Third party interest expense, net	0.0	0.0
Intercompany interest (income) expense, net	0.0	0.0
Interest expense, net	0.0	0.0
Other (income) expense, net	0.0	0.0
Total other expense, net	0.0	0.0
Income from equity investees	(58.1)	(56.2)
Income before income taxes	(58.1)	(56.2)
Income tax benefit (provision)	0.0	0.0
Net income before non-controlling interest	(58.1)	(56.2)
Less: Net loss attributable to non-controlling interests	0.3	1.9
Net income attributable to Tempur Sealy International, Inc.	(58.4)	(58.1)
Comprehensive income attributable to Tempur Sealy International, Inc.	(62.8)	(66.5)
Current Assets:
Cash and cash equivalents	0.0	0.0	0.0	0.0
Accounts receivable, net			11.1	(9.6)
Inventories			0.0	0.0
Income taxes receivable			(264.4)	(260.2)
Prepaid expenses and other current assets			0.0	0.0
Total Current Assets			(253.3)	(269.8)
Property, plant and equipment, net			0.0	0.0
Goodwill			0.0	0.0
Other intangible assets, net			0.0	0.0
Deferred income taxes			(11.1)	(11.8)
Other non-current assets			0.0	0.0
Net investment in subsidiaries			(661.4)	(2,508.7)
Due from affiliates			(585.1)	(2,078.7)
Total Assets			(1,510.9)	(4,869.0)
Current Liabilities:
Accounts payable			11.1	(9.6)
Accrued expenses and other current liabilities			0.0	0.0
Income taxes payable			(264.4)	(260.2)
Current portion of long-term debt			0.0	0.0
Total Current Liabilities			(253.3)	(269.8)
Long-term debt, net			0.0	0.0
Deferred income taxes			(11.1)	(11.8)
Other non-current liabilities			0.0	0.0
Due to affiliates			(585.1)	(2,078.7)
Total Liabilities			(849.5)	(2,360.3)
Redeemable non-controlling interest			(1.9)	(2.2)
Total Stockholders' Equity			(659.5)	(2,506.5)
Total Liabilities, Redeemable Non-Controlling Interest and Stockholders' Equity			$ (1,510.9)	$ (4,869.0)
Supplemental condensed consolidated statements of cash flows [Abstract]
Net cash provided by (used in) operating activities	0.0	0.0
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	0.0	0.0
Other	0.0
Other	0.0	0.0
Net cash used in investing activities	0.0	0.0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	0.0	0.0
Repayments of borrowings under long-term debt obligations	0.0	0.0
Net activity in investment in and advances (to) from subsidiaries and affiliates	0.0	0.0
Proceeds from issuance of treasury shares	0.0
Proceeds from exercise of stock options		0.0
Treasury stock repurchased	0.0	0.0
Other	0.0	0.0
Net cash used in financing activities	0.0	0.0
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0.0	0.0
Decrease in cash and cash equivalents	0.0	0.0
CASH AND CASH EQUIVALENTS, beginning of period	0.0	0.0
CASH AND CASH EQUIVALENTS, end of period	$ 0.0	$ 0.0