SEGMENT INFORMATION - Schedule of Changes in Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 320.8
Foreign currency translation adjustment	(8.6)
Goodwill from current year acquisition	17.1
Balance at end of period	329.3
Office Segment
Goodwill [Roll Forward]
Balance at beginning of period	39.1
Foreign currency translation adjustment	0.2
Goodwill from current year acquisition	17.1
Balance at end of period	56.4
Lifestyle Segment
Goodwill [Roll Forward]
Balance at beginning of period	281.7
Foreign currency translation adjustment	(8.8)
Goodwill from current year acquisition	0.0
Balance at end of period	$ 272.9