Restructuring and Related Activities - Schedule of Restructuring-Related Costs by Segment (Details) - 2024 restructuring plan - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | 12 Months Ended | 18 Months Ended | ||
|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
Jun. 30, 2025 |
|
| Restructuring Cost and Reserve [Line Items] | ||||||
| Total restructuring-related costs | $ 8.8 | $ 47.8 | $ 56.6 | |||
| Other restructuring | ||||||
| Restructuring Cost and Reserve [Line Items] | ||||||
| Total restructuring-related costs | $ 2.4 | $ 10.9 | 7.6 | $ 19.4 | $ 43.6 | $ 51.2 |
| Other restructuring | Bedding Products | ||||||
| Restructuring Cost and Reserve [Line Items] | ||||||
| Total restructuring-related costs | 1.2 | 9.6 | 4.3 | 16.6 | ||
| Other restructuring | Specialized Products | ||||||
| Restructuring Cost and Reserve [Line Items] | ||||||
| Total restructuring-related costs | 0.3 | 1.3 | 2.3 | 1.3 | ||
| Other restructuring | Furniture, Flooring & Textile Products | ||||||
| Restructuring Cost and Reserve [Line Items] | ||||||
| Total restructuring-related costs | $ 0.9 | $ 0.0 | $ 1.0 | $ 1.5 | ||