Goodwill (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning balance	$ 736.5us-gaap_Goodwill
Purchase price allocation adjustments from acquisition	(1.4)
Foreign currency translation adjustments	(16.8)us-gaap_GoodwillTranslationAdjustments
Ending balance	718.3us-gaap_Goodwill
Sealy
Goodwill [Roll Forward]
Beginning balance		521.9
Ending balance		521.9
North America
Goodwill [Line Items]
Number of Reporting Units	3
Goodwill [Roll Forward]
Beginning balance	574.5
Purchase price allocation adjustments from acquisition	0
Foreign currency translation adjustments	(6.0)
Ending balance	568.5
International
Goodwill [Line Items]
Number of Reporting Units	1
Goodwill [Roll Forward]
Beginning balance	162.0
Purchase price allocation adjustments from acquisition	(1.4)
Foreign currency translation adjustments	(10.8)
Ending balance	149.8
Scenario, Previously Reported \| North America
Goodwill [Roll Forward]
Beginning balance		106.2
Ending balance		106.2
Scenario, Previously Reported \| International
Goodwill [Roll Forward]
Beginning balance		108.4
Ending balance		108.4
Restatement Adjustment \| North America
Goodwill [Roll Forward]
Beginning balance		468.3
Ending balance		468.3
Restatement Adjustment \| International
Goodwill [Roll Forward]
Beginning balance		53.6
Ending balance		$ 53.6

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-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

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the 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 (g)

-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 805

-SubTopic 10

-Section 25

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e961-128460

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- Definition

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6523643

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