TREASURY STOCK- Narrative (Details) - USD ($) $ in Millions	6 Months Ended		47 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Oct. 24, 2017	Oct. 23, 2017
Equity, Class of Treasury Stock [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares)					20,000,000
Restricted Stock Units
Equity, Class of Treasury Stock [Line Items]
Shares paid for tax withholding (in shares)	523,539	481,739
Cost related to tax withholding	$ 15.0	$ 12.6
Share Repurchase Program, October 2017
Equity, Class of Treasury Stock [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares)	25,000,000		25,000,000	25,000,000
Shares repurchased during the period (in shares)	921,299	0	18,832,139
Value of shares repurchased	$ 24.6		$ 496.6
Stock remaining to be purchased (in shares)	6,167,861		6,167,861