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Segment Information - Summary of Average Assets for Segments (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Total assets	$ 3,748.9	$ 3,661.6
Operating segments | Bedding Products
Segment Reporting Information [Line Items]
Total assets	670.6	741.8
Operating segments | Specialized Products
Segment Reporting Information [Line Items]
Total assets	386.5	398.7
Operating segments | Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Total assets	319.4	346.1
Average current liabilities included in segment numbers above
Segment Reporting Information [Line Items]
Average liabilities	663.1	692.7
Unallocated assets
Segment Reporting Information [Line Items]
Total assets	1,701.6	1,634.0
Difference between average assets and period-end balance sheet
Segment Reporting Information [Line Items]
Total assets	$ 7.7	$ (151.7)

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