EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Antidilutive Securities Excluded from EPS Calculation (Details) - $ / shares	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding shares	2,751,470	3,761,830	2,794,032	2,688,049
Weighted average exercise price - antidilutive	$ 31.26	$ 29.89	$ 33.25	$ 41.27
Restricted Stock Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding shares	773,799	735,648	515,395	567,396
Weighted average exercise price - antidilutive	$ 12.29	$ 15.07	$ 13.68	$ 18.88