INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Provisional income tax expense related to transition tax associated with deemed repatriation of foreign earnings		$ 0.8	$ 3.1
Provisional income tax benefit related to re-measurement of deferred tax assets and liabilities	$ 87.0	2.3
State net operating loss carryforwards		26.0
Federal net operating loss carryforwards		21.0
Tax credit carryforwards		11.0
Foreign net operating loss carryforwards		$ 59.0
One-time transition charge	$ 2.0