REVENUES FROM CONTRACTS WITH CUSTOMERS - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Contract liability	$ 9.8		$ 8.8
Contract acquisition costs weighted average estimated period	6 years 6 months
Amortized deferred sales incentive cost	$ 3.0	$ 2.6
Accounts receivable, allowance for doubtful accounts	$ 50.5		$ 56.2