EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Antidilutive Securities Excluded from EPS Calculation (Details) - $ / shares	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding shares	3,761,830	1,950,289	2,688,049	1,522,304
Weighted average exercise price - antidilutive	$ 29.89	$ 30.07	$ 41.27	$ 36.23
Restricted Stock Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding shares	735,648	442,217	567,396	577,737
Weighted average exercise price - antidilutive	$ 15.07	$ 26.81	$ 18.88	$ 24.59