Summary of Significant Accounting Policies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) channel	Dec. 31, 2023 USD ($)
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Number of products sales channels | channel	2
Asia Pacific Joint Ventures
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Ownership percentage	50.00%
United Kingdom Joint Venture
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Ownership percentage	50.00%
Accrued Expenses And Other Current Liabilities
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Accrued warranty expense	$ 19.4	$ 18.9
Other Noncurrent Liabilities
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Accrued warranty expense	$ 22.2	$ 21.9
Bedding | Non-prorated | International
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Warranty term (in years)	5 years
Bedding | Prorated | International
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Warranty term (in years)	10 years
Bedding | Minimum | North America
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Warranty term (in years)	10 years
Bedding | Minimum | International
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Warranty term (in years)	5 years
Bedding | Minimum | Non-prorated | North America
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Warranty term (in years)	10 years
Bedding | Maximum | North America
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Warranty term (in years)	25 years
Bedding | Maximum | International
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Warranty term (in years)	15 years
Bedding | Maximum | Non-prorated | North America
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Warranty term (in years)	15 years
Pillows | North America
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Warranty term (in years)	3 years