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Impairment Charges (Schedule of Impairment Charges) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended | 24 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2025
Schedule Of Asset Impairment Charges [Line Items] |  |  |  |  |
Other Long-Lived Assets Impairment |  | $ 19.0 | $ 6.3 | $ 443.7 |
Goodwill Impairment | $ 675.3 | 0.0 | 676.0 | 0.0 |
Total Impairments |  |  | 682.3 |  |
2024 Restructuring Plan |  |  |  |  |
Schedule Of Asset Impairment Charges [Line Items] |  |  |  |  |
Restructuring and related costs |  | 29.7 | 47.8 |  | $ 77.5
Bedding Products |  |  |  |  |
Schedule Of Asset Impairment Charges [Line Items] |  |  |  |  |
Other Long-Lived Assets Impairment |  | 17.8 | 4.6 | 443.7 |
Goodwill Impairment |  |  | 587.9 |  |
Total Impairments |  |  | 592.5 |  |
Specialized Products |  |  |  |  |
Schedule Of Asset Impairment Charges [Line Items] |  |  |  |  |
Other Long-Lived Assets Impairment |  | 0.6 | 0.8 | 0.0 |
Goodwill Impairment |  |  | 43.6 |  |
Total Impairments |  |  | 44.4 |  |
Furniture, Flooring & Textile Products |  |  |  |  |
Schedule Of Asset Impairment Charges [Line Items] |  |  |  |  |
Other Long-Lived Assets Impairment |  | $ 0.6 | 0.9 | $ 0.0 |
Goodwill Impairment |  |  | 44.5 |  |
Total Impairments |  |  | $ 45.4 |  |

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