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Summary of Significant Accounting Policies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) channel	Dec. 31, 2021 USD ($)
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Number of products sales channels | channel	2
Ownership percentage	50.00%
Accrued Expenses And Other Current Liabilities
Warranty Term [Abstract]
Accrued warranty expense	$ 19.9	$ 20.2
Other Noncurrent Liabilities
Warranty Term [Abstract]
Accrued warranty expense	$ 24.4	$ 23.7
Mattresses | Non-prorated | International
Warranty Term [Abstract]
Warranty term (in years)	5 years
Mattresses | Prorated | International
Warranty Term [Abstract]
Warranty term (in years)	10 years
Mattresses | Minimum | North America
Warranty Term [Abstract]
Warranty term (in years)	10 years
Mattresses | Minimum | International
Warranty Term [Abstract]
Warranty term (in years)	5 years
Mattresses | Minimum | Non-prorated | North America
Warranty Term [Abstract]
Warranty term (in years)	10 years
Mattresses | Maximum | North America
Warranty Term [Abstract]
Warranty term (in years)	25 years
Mattresses | Maximum | International
Warranty Term [Abstract]
Warranty term (in years)	15 years
Mattresses | Maximum | Non-prorated | North America
Warranty Term [Abstract]
Warranty term (in years)	15 years
Pillows | North America
Warranty Term [Abstract]
Warranty term (in years)	3 years

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
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-URI http://asc.fasb.org/extlink&oid=123368208&loc=d3e12565-110249

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