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Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Net trade sales	$ 4,055.1	$ 4,383.6	$ 4,725.3
Bedding Products
Disaggregation of Revenue [Line Items]
Net trade sales	1,558.4	1,751.7	1,964.7
Bedding Products | Bedding Group
Disaggregation of Revenue [Line Items]
Net trade sales	1,558.4	1,751.7	1,964.7
Specialized Products
Disaggregation of Revenue [Line Items]
Net trade sales	1,122.4	1,239.1	1,279.8
Specialized Products | Automotive Group
Disaggregation of Revenue [Line Items]
Net trade sales	794.3	834.6	878.4
Specialized Products | Aerospace Products Group
Disaggregation of Revenue [Line Items]
Net trade sales	132.2	190.2	154.1
Specialized Products | Hydraulic Cylinders Group
Disaggregation of Revenue [Line Items]
Net trade sales	195.9	214.3	247.3
Furniture, Flooring & Textile Products
Disaggregation of Revenue [Line Items]
Net trade sales	1,374.3	1,392.8	1,480.8
Furniture, Flooring & Textile Products | Home Furniture Group
Disaggregation of Revenue [Line Items]
Net trade sales	250.9	273.8	300.5
Furniture, Flooring & Textile Products | Work Furniture Group
Disaggregation of Revenue [Line Items]
Net trade sales	276.1	272.3	272.8
Furniture, Flooring & Textile Products | Flooring & Textile Products Group
Disaggregation of Revenue [Line Items]
Net trade sales	$ 847.3	$ 846.7	$ 907.5

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