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Restructuring and Related Activities - Summary of Restructuring-Related Costs by Segment (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Aug. 31, 2024 | Sep. 30, 2024 | Sep. 30, 2024
2024 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total restructuring-related costs |  | $ 12.3 | $ 34.3
Bedding Products |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Gains from the sale of real estate | $ 14.0 |  |
Net restructuring and restructuring-related | 2024 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total restructuring-related costs |  | 11.7 | 31.1
Net restructuring and restructuring-related | Bedding Products | 2024 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total restructuring-related costs |  | 7.4 | 24.0
Net restructuring and restructuring-related | Specialized Products | 2024 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total restructuring-related costs |  | 3.8 | 5.1
Net restructuring and restructuring-related | Furniture, Flooring & Textile Products | 2024 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total restructuring-related costs |  | $ 0.5 | $ 2.0

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