SEGMENT INFORMATION - Schedule of Changes in Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 332.1
Foreign currency translation adjustment	8.2
Balance at end of period	340.3
Office Segment
Goodwill [Roll Forward]
Balance at beginning of period	54.3
Foreign currency translation adjustment	(0.1)
Balance at end of period	54.2
Lifestyle Segment
Goodwill [Roll Forward]
Balance at beginning of period	277.8
Foreign currency translation adjustment	8.3
Balance at end of period	$ 286.1