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v3.21.2

Summary of Significant Accounting Policies (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 USD ($) channel | Dec. 31, 2020 USD ($)
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 |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |
Accrued sales returns | $ 32.8 | $ 31.6
Warranty Term [Abstract] |  |
Accrued warranty expense | 22.6 | 20.3
Other noncurrent liabilities |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |
Accrued sales returns | 15.5 | 13.3
Warranty Term [Abstract] |  |
Accrued warranty expense | $ 24.5 | $ 23.9
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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