Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Net trade sales	$ 4,725.3	$ 5,146.7	$ 5,072.6
Bedding Products
Disaggregation of Revenue [Line Items]
Net trade sales	1,964.7	2,356.3	2,455.9
Bedding Products | Bedding Group
Disaggregation of Revenue [Line Items]
Net trade sales	1,964.7	2,356.3	2,455.9
Specialized Products
Disaggregation of Revenue [Line Items]
Net trade sales	1,279.8	1,118.3	998.9
Specialized Products | Automotive Group
Disaggregation of Revenue [Line Items]
Net trade sales	878.4	846.5	801.4
Specialized Products | Aerospace Products Group
Disaggregation of Revenue [Line Items]
Net trade sales	154.1	120.9	102.9
Specialized Products | Hydraulic Cylinders Group
Disaggregation of Revenue [Line Items]
Net trade sales	247.3	150.9	94.6
Furniture, Flooring & Textile Products
Disaggregation of Revenue [Line Items]
Net trade sales	1,480.8	1,672.1	1,617.8
Furniture, Flooring & Textile Products | Home Furniture Group
Disaggregation of Revenue [Line Items]
Net trade sales	300.5	398.0	434.3
Furniture, Flooring & Textile Products | Work Furniture Group
Disaggregation of Revenue [Line Items]
Net trade sales	272.8	318.7	284.1
Furniture, Flooring & Textile Products | Flooring & Textile Products Group
Disaggregation of Revenue [Line Items]
Net trade sales	$ 907.5	$ 955.4	$ 899.4