REVENUE - By Major Source (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 1,091.5	$ 1,009.7	$ 3,222.8	$ 2,959.3
Residential Products
Disaggregation of Revenue [Line Items]
Net sales	446.5		1,283.4
Residential Products | Bedding group
Disaggregation of Revenue [Line Items]
Net sales	236.9		679.3
Residential Products | Fabric & Flooring Products group
Disaggregation of Revenue [Line Items]
Net sales	194.2		555.2
Residential Products | Machinery group
Disaggregation of Revenue [Line Items]
Net sales	15.4		48.9
Industrial Products
Disaggregation of Revenue [Line Items]
Net sales	97.4		275.8
Industrial Products | Wire group
Disaggregation of Revenue [Line Items]
Net sales	97.4		275.8
Furniture Products
Disaggregation of Revenue [Line Items]
Net sales	294.1		866.8
Furniture Products | Home Furniture group
Disaggregation of Revenue [Line Items]
Net sales	91.9		291.9
Furniture Products | Work Furniture group
Disaggregation of Revenue [Line Items]
Net sales	71.6		217.5
Furniture Products | Consumer Products group
Disaggregation of Revenue [Line Items]
Net sales	130.6		357.4
Specialized Products
Disaggregation of Revenue [Line Items]
Net sales	253.5		796.8
Specialized Products | Automotive group
Disaggregation of Revenue [Line Items]
Net sales	195.7		623.5
Specialized Products | Aerospace Products group
Disaggregation of Revenue [Line Items]
Net sales	35.8		112.6
Specialized Products | Hydraulic Cylinders group
Disaggregation of Revenue [Line Items]
Net sales	$ 22.0		$ 60.7