Guarantor/Non-Guarantor Financial Information - Schedule of Supplemental Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental condensed consolidating statements of cash flows
Net cash (used in) provided by operating activities	$ 165.5	$ 234.2	$ 225.2
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of businesses, net of cash acquired	0.0	0.0	(8.5)
Proceeds from disposition of business	0.0	7.2	43.5
Purchases of property, plant and equipment	(62.4)	(65.9)	(47.5)
Other	0.0	(1.0)	2.1
Net cash used in investing activities	(62.4)	(59.7)	(10.4)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	2,233.3	863.5	271.5
Repayments of borrowings under long-term debt obligations	(1,867.7)	(988.3)	(510.9)
Proceeds from exercise of stock options	15.7	20.4	4.3
Excess tax benefit from stock-based compensation	7.0	21.8	1.7
Proceeds from purchase of treasury shares by CEO	0.0	5.0	0.0
Treasury stock repurchased	(535.0)	(1.3)	(2.2)
Payment of deferred financing costs	(6.9)	(8.0)	(3.1)
Fees paid to lenders	(7.8)	0.0	0.0
Call premium on 2020 Senior Notes	(23.6)	0.0	0.0
Other	(0.1)	(3.8)	0.6
Net cash used in financing activities	(185.1)	(90.7)	(238.1)
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(6.2)	7.6	4.8
(Decrease) increase in cash and cash equivalents	(88.2)	91.4	(18.5)
CASH AND CASH EQUIVALENTS, beginning of period	153.9	62.5	81.0
CASH AND CASH EQUIVALENTS, end of period	65.7	153.9	62.5
Consolidated
Supplemental condensed consolidating statements of cash flows
Net cash (used in) provided by operating activities	165.5	234.2	225.2
CASH FLOWS FROM INVESTING ACTIVITIES:
Contributions (paid to) received from subsidiaries and affiliates	0.0
Acquisition of businesses, net of cash acquired			(8.5)
Proceeds from disposition of business		7.2	43.5
Purchases of property, plant and equipment	(62.4)	(65.9)	(47.5)
Other		(1.0)	2.1
Net cash used in investing activities	(62.4)	(59.7)	(10.4)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	2,233.3	863.5	271.5
Repayments of borrowings under long-term debt obligations	(1,867.7)	(988.3)	(510.9)
Net activity in investment in and advances from (to) subsidiaries and affiliates	0.0	0.0	0.0
Proceeds from exercise of stock options	15.7	20.4	4.3
Excess tax benefit from stock-based compensation	7.0	21.8	1.7
Proceeds from purchase of treasury shares by CEO		5.0
Treasury stock repurchased	(535.0)	(1.3)	(2.2)
Payment of deferred financing costs	(6.9)	(8.0)	(3.1)
Fees paid to lenders	(7.8)
Call premium on 2020 Senior Notes	(23.6)
Other	(0.1)	(3.8)	0.6
Net cash used in financing activities	(185.1)	(90.7)	(238.1)
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(6.2)	7.6	4.8
(Decrease) increase in cash and cash equivalents	(88.2)	91.4	(18.5)
CASH AND CASH EQUIVALENTS, beginning of period	153.9	62.5	81.0
CASH AND CASH EQUIVALENTS, end of period	65.7	153.9	62.5
Reportable Legal Entities | Tempur Sealy International, Inc. (Ultimate Parent)
Supplemental condensed consolidating statements of cash flows
Net cash (used in) provided by operating activities	(63.1)	(87.0)	(62.7)
CASH FLOWS FROM INVESTING ACTIVITIES:
Contributions (paid to) received from subsidiaries and affiliates	0.0
Acquisition of businesses, net of cash acquired			0.0
Proceeds from disposition of business		0.0	0.0
Purchases of property, plant and equipment	0.0	0.0	0.0
Other		0.0	0.0
Net cash used in investing activities	0.0	0.0	0.0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	600.0	450.0	0.0
Repayments of borrowings under long-term debt obligations	(375.0)	0.0	0.0
Net activity in investment in and advances from (to) subsidiaries and affiliates	383.1	(401.3)	59.3
Proceeds from exercise of stock options	15.7	20.4	4.3
Excess tax benefit from stock-based compensation	7.0	21.8	1.7
Proceeds from purchase of treasury shares by CEO		5.0
Treasury stock repurchased	(535.0)	(1.3)	(2.2)
Payment of deferred financing costs	(3.1)	(8.0)	0.0
Fees paid to lenders	(6.0)
Call premium on 2020 Senior Notes	(23.6)
Other	0.0	0.0	0.0
Net cash used in financing activities	63.1	86.6	63.1
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0.0	0.0	0.0
(Decrease) increase in cash and cash equivalents	0.0	(0.4)	0.4
CASH AND CASH EQUIVALENTS, beginning of period	0.0	0.4	0.0
CASH AND CASH EQUIVALENTS, end of period	0.0	0.0	0.4
Reportable Legal Entities | Combined Guarantor Subsidiaries
Supplemental condensed consolidating statements of cash flows
Net cash (used in) provided by operating activities	110.7	274.7	191.5
CASH FLOWS FROM INVESTING ACTIVITIES:
Contributions (paid to) received from subsidiaries and affiliates	(76.7)
Acquisition of businesses, net of cash acquired			0.0
Proceeds from disposition of business		7.2	43.5
Purchases of property, plant and equipment	(43.0)	(49.9)	(31.3)
Other		(0.7)	3.0
Net cash used in investing activities	(119.7)	(43.4)	15.2
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	1,523.6	402.9	271.5
Repayments of borrowings under long-term debt obligations	(1,406.2)	(988.3)	(510.9)
Net activity in investment in and advances from (to) subsidiaries and affiliates	(212.5)	453.4	32.1
Proceeds from exercise of stock options	0.0	0.0	0.0
Excess tax benefit from stock-based compensation	0.0	0.0	0.0
Proceeds from purchase of treasury shares by CEO		0.0
Treasury stock repurchased	0.0	0.0	0.0
Payment of deferred financing costs	(3.8)	0.0	(3.1)
Fees paid to lenders	(1.8)
Call premium on 2020 Senior Notes	0.0
Other	(2.1)	(3.0)	(1.7)
Net cash used in financing activities	(102.8)	(135.0)	(212.1)
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0.0	0.0	0.0
(Decrease) increase in cash and cash equivalents	(111.8)	96.3	(5.4)
CASH AND CASH EQUIVALENTS, beginning of period	119.7	23.4	28.8
CASH AND CASH EQUIVALENTS, end of period	7.9	119.7	23.4
Reportable Legal Entities | Combined Non-Guarantor Subsidiaries
Supplemental condensed consolidating statements of cash flows
Net cash (used in) provided by operating activities	117.9	46.5	96.4
CASH FLOWS FROM INVESTING ACTIVITIES:
Contributions (paid to) received from subsidiaries and affiliates	76.7
Acquisition of businesses, net of cash acquired			(8.5)
Proceeds from disposition of business		0.0	0.0
Purchases of property, plant and equipment	(19.4)	(16.0)	(16.2)
Other		(0.3)	(0.9)
Net cash used in investing activities	57.3	(16.3)	(25.6)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	109.7	10.6	0.0
Repayments of borrowings under long-term debt obligations	(86.5)	0.0	0.0
Net activity in investment in and advances from (to) subsidiaries and affiliates	(170.6)	(52.1)	(91.4)
Proceeds from exercise of stock options	0.0	0.0	0.0
Excess tax benefit from stock-based compensation	0.0	0.0	0.0
Proceeds from purchase of treasury shares by CEO		0.0
Treasury stock repurchased	0.0	0.0	0.0
Payment of deferred financing costs	0.0	0.0	0.0
Fees paid to lenders	0.0
Call premium on 2020 Senior Notes	0.0
Other	2.0	(0.8)	2.3
Net cash used in financing activities	(145.4)	(42.3)	(89.1)
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(6.2)	7.6	4.8
(Decrease) increase in cash and cash equivalents	23.6	(4.5)	(13.5)
CASH AND CASH EQUIVALENTS, beginning of period	34.2	38.7	52.2
CASH AND CASH EQUIVALENTS, end of period	57.8	34.2	38.7
Eliminations
Supplemental condensed consolidating statements of cash flows
Net cash (used in) provided by operating activities	0.0	0.0	0.0
CASH FLOWS FROM INVESTING ACTIVITIES:
Contributions (paid to) received from subsidiaries and affiliates	0.0
Acquisition of businesses, net of cash acquired			0.0
Proceeds from disposition of business		0.0	0.0
Purchases of property, plant and equipment		0.0	0.0
Other		0.0	0.0
Net cash used in investing activities	0.0	0.0	0.0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under long-term debt obligations	0.0	0.0	0.0
Repayments of borrowings under long-term debt obligations	0.0	0.0	0.0
Net activity in investment in and advances from (to) subsidiaries and affiliates	0.0	0.0	0.0
Proceeds from exercise of stock options	0.0	0.0	0.0
Excess tax benefit from stock-based compensation	0.0	0.0	0.0
Proceeds from purchase of treasury shares by CEO		0.0
Treasury stock repurchased	0.0	0.0	0.0
Payment of deferred financing costs	0.0	0.0	0.0
Fees paid to lenders	0.0
Call premium on 2020 Senior Notes	0.0
Other	0.0	0.0	0.0
Net cash used in financing activities	0.0	0.0	0.0
NET EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0.0	0.0	0.0
(Decrease) increase in cash and cash equivalents	0.0	0.0	0.0
CASH AND CASH EQUIVALENTS, beginning of period	0.0	0.0	0.0
CASH AND CASH EQUIVALENTS, end of period	$ 0.0	$ 0.0	$ 0.0