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v3.24.0.1

Segment Information (Average Assets For Segments) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Assets | $ 4,634,500,000 | $ 5,186,100,000 | $ 5,307,300,000
Additions to Property, Plant and Equipment | 113,800,000 | 100,300,000 | 106,600,000
Acquired Companies’ Long-Lived Assets | 0 | 100,900,000 | 167,900,000
Long-lived asset impairment | 443,700,000 | 0 | 0
Operating segments | Bedding Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Assets | 815,200,000 | 931,200,000 | 836,000,000.0
Additions to Property, Plant and Equipment | 47,300,000 | 42,100,000 | 67,100,000
Acquired Companies’ Long-Lived Assets | 0 | 0 | 136,600,000
Operating segments | Specialized Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Assets | 398,600,000 | 350,100,000 | 316,700,000
Additions to Property, Plant and Equipment | 42,700,000 | 28,200,000 | 20,600,000
Acquired Companies’ Long-Lived Assets | 0 | 93,800,000 | 25,100,000
Operating segments | Furniture, Flooring & Textile Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Assets | 390,300,000 | 423,100,000 | 373,500,000
Additions to Property, Plant and Equipment | 12,700,000 | 12,500,000 | 9,800,000
Acquired Companies’ Long-Lived Assets | 0 | 7,100,000 | 6,200,000
Average current liabilities included in segment numbers above |  |  |
Segment Reporting Information [Line Items] |  |  |
Assets | 736,100,000 | 793,900,000 | 814,100,000
Additions to Property, Plant and Equipment | 0 | 0 | 0
Acquired Companies’ Long-Lived Assets | 0 | 0 | 0
Unallocated assets and other |  |  |
Segment Reporting Information [Line Items] |  |  |
Assets | 2,403,200,000 | 2,840,600,000 | 2,828,500,000
Additions to Property, Plant and Equipment | 11,100,000 | 17,500,000 | 9,100,000
Acquired Companies’ Long-Lived Assets | 0 | 0 | 0
Difference between average assets and year-end balance sheet |  |  |
Segment Reporting Information [Line Items] |  |  |
Assets | (108,900,000) | (152,800,000) | 138,500,000
Additions to Property, Plant and Equipment | 0 | 0 | 0
Acquired Companies’ Long-Lived Assets | $ 0 | $ 0 | $ 0

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