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Restructuring and Related Activities (Summary of Incurred Costs) (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
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Goodwill impairment | $ 675.3 | $ 0.0 | $ 676.0 | $ 0.0 |
Bedding Products |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Goodwill impairment |  |  | 587.9 |  |
2024 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Total Incurred Cost |  | 29.7 | 47.8 |  | $ 77.5
Total Approximate Amount Expected to be Incurred |  | 80.0 |  |  | 80.0
2024 Restructuring Plan | United States Machinery Business |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Goodwill impairment |  |  | 0.7 |  |
Net cash restructuring and restructuring-related costs | 2024 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Total Incurred Cost |  | 8.7 | 30.3 |  | 39.0
Total Approximate Amount Expected to be Incurred |  | 40.0 |  |  | 40.0
Net non-cash restructuring and restructuring-related costs | 2024 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Total Incurred Cost |  | 2.0 | 13.3 |  | 15.3
Total Approximate Amount Expected to be Incurred |  | 17.0 |  |  | 17.0
Total net restructuring and restructuring-related costs | 2024 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Total Incurred Cost |  | 10.7 | 43.6 |  | 54.3
Total Approximate Amount Expected to be Incurred |  | 57.0 |  |  | 57.0
Total net restructuring and restructuring-related costs | 2024 Restructuring Plan | Bedding Products |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Total Incurred Cost |  | 5.6 | 33.9 |  |
Goodwill and long-lived asset impairment costs | 2024 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Total Incurred Cost |  | 19.0 | $ 4.2 |  | 23.2
Total Approximate Amount Expected to be Incurred |  | $ 23.0 |  |  | $ 23.0

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