IMPAIRMENT CHARGES (Impairment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill impairment	$ 0.0		$ 25.4	$ 0.0
Other Long-Lived Assets Impairments	0.0	$ 1.4	4.0	5.7
Total Impairments	0.0	1.4	29.4	5.7
Bedding Products
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill impairment	0.0		0.0
Other Long-Lived Assets Impairments	0.0	0.8	0.3	4.3
Total Impairments	0.0		0.3
Specialized Products
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill impairment	0.0		25.4
Other Long-Lived Assets Impairments	0.0	0.0	0.0	0.0
Total Impairments	0.0		25.4
Furniture, Flooring & Textile Products
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill impairment	0.0		0.0
Other Long-Lived Assets Impairments	0.0	0.6	0.2	1.4
Total Impairments	0.0		0.2
Unallocated
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill impairment	0.0		0.0
Other Long-Lived Assets Impairments	0.0	$ 0.0	3.5	$ 0.0
Total Impairments	$ 0.0		$ 3.5