SEGMENT INFORMATION - Segment Information with Corporate Costs Excluded (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)
Financial information of segments
Number of reportable segments | segment			2
Sales	$ 274.1	$ 367.3	$ 614.1	$ 700.1
Operating profit	(10.1)	33.9	1.3	63.1
Operating Segments
Financial information of segments
Sales	274.1	367.3	614.1	700.1
Intersegment sales	2.3	3.1	4.9	5.9
Corporate
Financial information of segments
Operating profit	(20.0)	(6.0)	(26.1)	(11.7)
Office
Financial information of segments
Sales	180.3	223.2	396.7	425.4
Office | Operating Segments
Financial information of segments
Sales	180.3	223.2	396.7	425.4
Intersegment sales	0.1	0.5	0.4	0.9
Operating profit	0.8	14.3	4.7	28.5
Lifestyle
Financial information of segments
Sales	93.8	144.1	217.4	274.7
Lifestyle | Operating Segments
Financial information of segments
Sales	93.8	144.1	217.4	274.7
Intersegment sales	2.2	2.6	4.5	5.0
Operating profit	$ 9.1	$ 25.6	$ 22.7	$ 46.3