SEGMENT INFORMATION - Summary of Segment Results from Continuing Operations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) segment	Mar. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment	3
Net trade sales	$ 1,213.6	$ 1,322.3
Total Sales	1,226.7	1,339.5
EBIT	89.3	137.6
Depreciation and Amortization	45.4	45.7
Bedding Products
Segment Reporting Information [Line Items]
Total Sales	538.1	651.4
EBIT	33.3	76.2
Depreciation and Amortization	25.6	26.2
Specialized Products
Segment Reporting Information [Line Items]
Net trade sales	320.7	264.1
Total Sales	321.1	265.0
EBIT	28.7	20.3
Depreciation and Amortization	10.7	10.8
Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Net trade sales	364.4	418.8
Total Sales	367.5	423.1
EBIT	28.3	42.7
Depreciation and Amortization	5.8	5.9
Operating segments
Segment Reporting Information [Line Items]
Net trade sales	1,213.6	1,322.3
Operating segments | Bedding Products
Segment Reporting Information [Line Items]
Net trade sales	528.5	639.4
Operating segments | Specialized Products
Segment Reporting Information [Line Items]
Net trade sales	320.7	264.1
Operating segments | Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Net trade sales	364.4	418.8
Intersegment eliminations
Segment Reporting Information [Line Items]
Net trade sales	13.1	17.2
EBIT	(1.0)	(1.6)
Depreciation and Amortization	3.3	2.8
Intersegment eliminations | Bedding Products
Segment Reporting Information [Line Items]
Net trade sales	9.6	12.0
Intersegment eliminations | Specialized Products
Segment Reporting Information [Line Items]
Net trade sales	0.4	0.9
Intersegment eliminations | Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Net trade sales	$ 3.1	$ 4.3