SEGMENT INFORMATION - Summary of Segment Results from Continuing Operations (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment			3
Net trade sales	$ 1,207.6	$ 1,239.3	$ 3,098.2	$ 3,607.6
Total Sales	1,221.2	1,254.6	3,134.3	3,653.2
EBIT	147.3	144.1	250.8	378.3
Depreciation and Amortization	47.0	48.4	141.0	144.7
Goodwill impairment	0.0		25.4	0.0
Hydraulic Cylinders group
Segment Reporting Information [Line Items]
Goodwill impairment			25.4
Bedding Products
Segment Reporting Information [Line Items]
Total Sales	599.8	612.2	1,514.6	1,755.3
EBIT	73.6	70.7	122.2	178.3
Depreciation and Amortization	26.6	27.5	79.7	80.5
Goodwill impairment	0.0		0.0
Specialized Products
Segment Reporting Information [Line Items]
Net trade sales	242.9	267.2	618.2	797.1
Total Sales	243.7	268.1	620.2	799.6
EBIT	32.7	44.4	40.7	121.6
Depreciation and Amortization	10.7	10.4	32.5	31.0
Goodwill impairment	0.0		25.4
Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Net trade sales	374.9	370.7	989.0	1,086.4
Total Sales	377.7	374.3	999.5	1,098.3
EBIT	41.7	29.3	91.6	79.2
Depreciation and Amortization	6.3	6.4	19.1	19.7
Operating segments
Segment Reporting Information [Line Items]
Net trade sales	1,207.6	1,239.3	3,098.2	3,607.6
Operating segments | Bedding Products
Segment Reporting Information [Line Items]
Net trade sales	589.8	601.4	1,491.0	1,724.1
Operating segments | Specialized Products
Segment Reporting Information [Line Items]
Net trade sales	242.9	267.2	618.2	797.1
Operating segments | Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Net trade sales	374.9	370.7	989.0	1,086.4
Intersegment eliminations
Segment Reporting Information [Line Items]
Net trade sales	13.6	15.3	36.1	45.6
EBIT	(0.7)	(0.3)	(3.7)	(0.8)
Depreciation and Amortization	3.4	4.1	9.7	13.5
Intersegment eliminations | Bedding Products
Segment Reporting Information [Line Items]
Net trade sales	10.0	10.8	23.6	31.2
Intersegment eliminations | Specialized Products
Segment Reporting Information [Line Items]
Net trade sales	0.8	0.9	2.0	2.5
Intersegment eliminations | Furniture, Flooring & Textile Products
Segment Reporting Information [Line Items]
Net trade sales	$ 2.8	$ 3.6	$ 10.5	$ 11.9