STOCK PLANS AND STOCK-BASED COMPENSATION Valuation Assumptions (Details) - $ / shares	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	29.10%	31.10%	27.00%
Risk-free interest rate	1.70%	1.10%	1.40%
Expected dividends	1.20%	1.40%	1.10%
Expected life (in years)	4 years 7 months 6 days	4 years 146 days	4 years 73 days
Weighted-average grant date fair value (in dollars per share)	$ 12.58	$ 10.39	$ 11.39
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	30.50%	28.80%	33.50%
Risk-free interest rate	1.50%	0.60%	0.30%
Expected dividends	1.20%	1.10%	1.40%
Expected life (in years)	6 months	183 days	183 days
Weighted-average grant date fair value (in dollars per share)	$ 11.78	$ 12.03	$ 10.33