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Segment Information - Summary of Average Assets for Segments (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total assets	$ 4,614.8	$ 4,634.5
Operating segments | Bedding Products
Segment Reporting Information [Line Items]
Total assets	791.3	815.2
Operating segments | Specialized Products
Segment Reporting Information [Line Items]
Total assets	393.6	398.6
Operating segments | Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Total assets	350.8	390.3
Average current liabilities included in segment numbers above
Segment Reporting Information [Line Items]
Total assets	692.1	736.1
Unallocated assets
Segment Reporting Information [Line Items]
Total assets	2,408.6	2,403.2
Difference between average assets and period-end balance sheet
Segment Reporting Information [Line Items]
Total assets	$ (21.6)	$ (108.9)

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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