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Segment Information - Summary of Average Assets for Segments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total assets	$ 3,838.8	$ 3,838.8		$ 4,634.5
Goodwill impairment	675.3	675.3	$ 0.0
Bedding Products
Segment Reporting Information [Line Items]
Goodwill impairment	587.2	587.2
Specialized Products
Segment Reporting Information [Line Items]
Goodwill impairment	43.6	43.6
Operating segments | Bedding Products
Segment Reporting Information [Line Items]
Total assets	773.7	773.7		815.2
Operating segments | Specialized Products
Segment Reporting Information [Line Items]
Total assets	396.7	396.7		398.6
Operating segments | Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Total assets	354.3	354.3		390.3
Average current liabilities included in segment numbers above
Segment Reporting Information [Line Items]
Total assets	689.1	689.1		736.1
Unallocated assets
Segment Reporting Information [Line Items]
Total assets	1,678.8	1,678.8		2,403.2
Difference between average assets and period-end balance sheet
Segment Reporting Information [Line Items]
Total assets	$ (53.8)	$ (53.8)		$ (108.9)

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