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Goodwill and Other Intangible Assets - Goodwill by Reportable Business Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Goodwill [Roll Forward] |  |
Goodwill, Beginning balance | $ 722.5 | $ 709.4
Goodwill resulting from acquisition |  | 7.4
Foreign currency translation adjustments | 10.6 | 5.7
Goodwill, Ending balance | 733.1 | 722.5
Tempur North America | Tempur Sealy U.S. |  |
Goodwill [Roll Forward] |  |
Goodwill, Beginning balance | 572.0 | 562.8
Goodwill resulting from acquisition |  | 7.4
Foreign currency translation adjustments | 4.6 | 1.8
Goodwill, Ending balance | 576.6 | 572.0
Tempur International | Sealy Canada |  |
Goodwill [Roll Forward] |  |
Goodwill, Beginning balance | 150.5 | 146.6
Goodwill resulting from acquisition |  | 0.0
Foreign currency translation adjustments | 6.0 | 3.9
Goodwill, Ending balance | $ 156.5 | $ 150.5

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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