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Goodwill and Other Intangible Assets - Goodwill by Reportable Business Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, Beginning balance	$ 732.7	$ 699.2
Foreign currency translation adjustments	(9.7)	33.5
Goodwill, Ending balance	723.0	732.7
North America | Tempur Sealy U.S.
Goodwill [Roll Forward]
Goodwill, Beginning balance	576.6	572.0
Foreign currency translation adjustments	(5.5)	4.6
Goodwill, Ending balance	571.1	576.6
International | Sealy Canada
Goodwill [Roll Forward]
Goodwill, Beginning balance	156.1	127.2
Foreign currency translation adjustments	(4.2)	28.9
Goodwill, Ending balance	$ 151.9	$ 156.1

X

- Definition

Goodwill, Translation Adjustments and Other

+ References

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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