REVENUES FROM CONTRACTS WITH CUSTOMERS - Schedule of Total Contract Acquisition Costs (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total contract acquisition costs	$ 42.2	$ 38.4
Other current assets
Disaggregation of Revenue [Line Items]
Total contract acquisition costs	11.1	9.5
Other assets
Disaggregation of Revenue [Line Items]
Total contract acquisition costs	$ 31.1	$ 28.9