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Restructuring and Related Activities - Schedule of Restructuring-Related Costs by Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended | 30 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2026
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost | $ 10.1 | $ 2.2 | $ 12.2 | $ 8.8 |  |  |
2024 restructuring plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost |  |  | 3.6 |  | $ 29.7 | $ 47.8 | $ 81.1
2026 Restructuring Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost | 9.5 |  | 11.4 |  |  |  |
Other restructuring | 2024 restructuring plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost | 0.6 | 2.4 | 0.8 | 7.6 | $ 10.7 | $ 43.6 | $ 55.1
Other restructuring | 2026 Restructuring Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost | 9.5 | 0.0 | 11.4 | 0.0 |  |  |
Other restructuring | Bedding Products | 2024 restructuring plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost | 0.1 | 1.2 | 0.3 | 4.3 |  |  |
Other restructuring | Bedding Products | 2026 Restructuring Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost | 5.8 | 0.0 | 7.5 | 0.0 |  |  |
Other restructuring | Specialized Products | 2024 restructuring plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost | 0.5 | 0.3 | 0.5 | 2.3 |  |  |
Other restructuring | Specialized Products | 2026 Restructuring Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost | 2.7 | 0.0 | 2.7 | 0.0 |  |  |
Other restructuring | Furniture, Flooring & Textile Products | 2024 restructuring plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost | 0.0 | 0.9 | 0.0 | 1.0 |  |  |
Other restructuring | Furniture, Flooring & Textile Products | 2026 Restructuring Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Total incurred cost | $ 1.0 | $ 0.0 | $ 1.2 | $ 0.0 |  |  |

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