SEGMENT INFORMATION - Summary of Segment Results from Continuing Operations (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($)
Segment Reporting [Abstract]
Number of operating segments \| segment			3
Segment Reporting Information [Line Items]
Net trade sales	$ 1,221.2	$ 1,334.2	$ 2,434.8	$ 2,656.5
EBIT	95.7	143.0	185.0	280.6
Depreciation and Amortization	44.7	44.5	90.1	90.2
Bedding Products
Segment Reporting Information [Line Items]
Net trade sales	504.4	612.5	1,032.9	1,251.9
Specialized Products
Segment Reporting Information [Line Items]
Net trade sales	321.2	260.1	641.9	524.2
Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Net trade sales	395.6	461.6	760.0	880.4
Trade sales
Segment Reporting Information [Line Items]
Net trade sales	1,233.6	1,349.8	2,460.3	2,689.3
Trade sales \| Bedding Products
Segment Reporting Information [Line Items]
Net trade sales	512.9	623.9	1,051.0	1,275.3
EBIT	23.0	69.1	56.3	145.3
Depreciation and Amortization	25.5	26.2	51.1	52.4
Trade sales \| Specialized Products
Segment Reporting Information [Line Items]
Net trade sales	321.7	260.5	642.8	525.5
EBIT	33.1	21.4	61.8	41.7
Depreciation and Amortization	10.3	9.9	21.0	20.7
Trade sales \| Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Net trade sales	399.0	465.4	766.5	888.5
EBIT	38.9	51.3	67.2	94.0
Depreciation and Amortization	5.7	5.9	11.5	11.8
Intersegment eliminations
Segment Reporting Information [Line Items]
Net trade sales	12.4	15.6	25.5	32.8
EBIT	0.7	1.2	(0.3)	(0.4)
Depreciation and Amortization	3.2	2.5	6.5	5.3
Intersegment eliminations \| Bedding Products
Segment Reporting Information [Line Items]
Net trade sales	8.5	11.4	18.1	23.4
Intersegment eliminations \| Specialized Products
Segment Reporting Information [Line Items]
Net trade sales	0.5	0.4	0.9	1.3
Intersegment eliminations \| Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Net trade sales	$ 3.4	$ 3.8	$ 6.5	$ 8.1

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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