REVENUE RECOGNITION - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue recognized			$ 240.5
Deferred revenue	$ 365.5		365.5
Unrecognized accounts receivable and deferred revenue	4.9		4.9		$ 23.3
Capitalized contract cost	6.8		6.8		6.4
Amortization of capitalized costs to obtain contracts	1.6	$ 1.5	$ 4.8	$ 4.8
Minimum
Disaggregation of Revenue [Line Items]
Payment terms			30 days
Maximum
Disaggregation of Revenue [Line Items]
Payment terms			90 days
Prepaid expenses and other current assets
Disaggregation of Revenue [Line Items]
Capitalized contract cost	3.8		$ 3.8		3.8
Other assets
Disaggregation of Revenue [Line Items]
Capitalized contract cost	$ 3.0		$ 3.0		$ 2.6