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Segment Information - Summary of Average Assets for Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |  |  |
Total assets | $ 3,838.8 | $ 3,838.8 |  | $ 4,634.5
Goodwill impairment | 675.3 | 675.3 | $ 0.0 |
Bedding Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Goodwill impairment | 587.2 | 587.2 |  |
Specialized Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Goodwill impairment | 43.6 | 43.6 |  |
Operating segments | Bedding Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total assets | 773.7 | 773.7 |  | 815.2
Operating segments | Specialized Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total assets | 396.7 | 396.7 |  | 398.6
Operating segments | Furniture, Flooring & Textile Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total assets | 354.3 | 354.3 |  | 390.3
Average current liabilities included in segment numbers above |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total assets | 689.1 | 689.1 |  | 736.1
Unallocated assets |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total assets | 1,678.8 | 1,678.8 |  | 2,403.2
Difference between average assets and period-end balance sheet |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total assets | $ (53.8) | $ (53.8) |  | $ (108.9)

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