Earnings Per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Redemption value adjustment	$ 1.0
Numerator:
Net income attributable to Tempur Sealy International, Inc.	$ 23.4us-gaap_NetIncomeLoss	$ 27.4us-gaap_NetIncomeLoss
Denominator:
Denominator for basic earnings per common share-weighted average shares	60.9	60.7
Effect of dilutive securities:
Employee stock-based compensation (in shares)	1.3	1.2
Denominator for diluted earnings per common share-adjusted weighted average shares	62.2	61.9
Basic earnings per common share (in dollars per share)	$ 0.38us-gaap_EarningsPerShareBasic	$ 0.45us-gaap_EarningsPerShareBasic
Diluted earnings per common share (in dollars per share)	$ 0.38us-gaap_EarningsPerShareDiluted	$ 0.44us-gaap_EarningsPerShareDiluted
Shares excluded from diluted earnings per common share computation as anti-dilutive (in shares)	0.3	0.3

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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