INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Contingency [Line Items]
Effective income tax rate percentage	(11.70%)	(4.70%)	(10.50%)	(1.40%)
Unrecognized tax benefits	$ 118.0		$ 118.0
Unrecognized tax benefits that would impact effective tax rate	99.8		99.8
Accrued interest and penalties related to unrecognized tax benefits	1.1		1.1
Increase in unrecognized tax benefits, reasonably possible	11.2		11.2
Deferred Tax Asset
Income Tax Contingency [Line Items]
Unrecognized tax benefits	112.0		112.0
Other Noncurrent Liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 6.0		$ 6.0