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Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) channel | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Oct. 31, 2020
Business Acquisition [Line Items] |  |  |  |
Number of products sales channels | channel | 2 |  |  |
Depreciation expense | $ 111.4 | $ 94.7 | $ 80.5 |
Sales returns accrual | 40.5 | 49.8 | 44.9 |
Shipping and handling included in cost of sales | 330.3 | 294.8 | 223.1 |
Advertising costs charged to expense | 448.0 | 432.8 | 332.5 |
Advertising costs deferred and included in prepaid expenses and other current assets | 12.4 | 9.0 |  |
Research and development costs charged to expense | 29.2 | 27.3 | $ 23.1 |
Defined benefit plan, benefit obligation | 30.1 | 42.1 |  |
Defined benefit plan, amount | $ 25.8 | 34.3 |  |
2029 Senior Notes | Redemption period three | Senior Notes |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Percentage of redemption on notes | 100.00% |  |  |
Joint Ventures |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Ownership percentage | 50.00% |  |  |
United Kingdom Joint Venture |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Ownership percentage | 50.00% |  |  | 50.00%
Bedding | Non-prorated | International Segment |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Warranty term (in years) | 5 years |  |  |
Bedding | Prorated | International Segment |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Warranty term (in years) | 10 years |  |  |
Pillows Two | Non-prorated |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Warranty term (in years) | 3 years |  |  |
Accrued liabilities and other current liabilities |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Sales returns accrual | $ 27.5 | 33.7 |  |
Other non-current liabilities |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Sales returns accrual | 13.0 | 16.1 |  |
Standard product warranty accrual | 23.8 | 23.7 |  |
Accounts payable and accrued liabilities |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Standard product warranty accrual | $ 17.8 | $ 20.2 |  |
Minimum | Bedding | North America Segment |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Warranty term (in years) | 10 years |  |  |
Minimum | Bedding | International Segment |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Warranty term (in years) | 5 years |  |  |
Minimum | Bedding | Non-prorated | North America Segment |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Warranty term (in years) | 10 years |  |  |
Maximum | Bedding | North America Segment |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Warranty term (in years) | 25 years |  |  |
Maximum | Bedding | International Segment |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Warranty term (in years) | 15 years |  |  |
Maximum | Bedding | Non-prorated | North America Segment |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Warranty term (in years) | 15 years |  |  |

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