REVENUE - By Major Source (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Net trade sales	$ 1,322.3	$ 1,150.9
Bedding Products | Bedding Group
Disaggregation of Revenue [Line Items]
Net trade sales	639.4	535.8
Specialized Products
Disaggregation of Revenue [Line Items]
Net trade sales	264.1	257.6
Specialized Products | Automotive Group
Disaggregation of Revenue [Line Items]
Net trade sales	207.5	210.8
Specialized Products | Aerospace Products Group
Disaggregation of Revenue [Line Items]
Net trade sales	29.0	23.7
Specialized Products | Hydraulic Cylinders Group
Disaggregation of Revenue [Line Items]
Net trade sales	27.6	23.1
Furniture, Flooring & Textile Products
Disaggregation of Revenue [Line Items]
Net trade sales	418.8	357.5
Furniture, Flooring & Textile Products | Home Furniture Group
Disaggregation of Revenue [Line Items]
Net trade sales	118.4	96.1
Furniture, Flooring & Textile Products | Work Furniture Group
Disaggregation of Revenue [Line Items]
Net trade sales	83.7	63.7
Furniture, Flooring & Textile Products | Flooring & Textile Products Group
Disaggregation of Revenue [Line Items]
Net trade sales	$ 216.7	$ 197.7