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INTEREST AND OTHER, NET (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
INTEREST AND OTHER, NET
Interest expense	$ 19.9us-gaap_InterestExpense	$ 19.9us-gaap_InterestExpense	$ 57.5us-gaap_InterestExpense	$ 60.4us-gaap_InterestExpense
Weighted average interest rate for long term debt (as a percent)	3.20%	3.20%	3.20%	3.20%
Interest income	4.7us-gaap_InvestmentIncomeInterest	4.7us-gaap_InvestmentIncomeInterest	14.7us-gaap_InvestmentIncomeInterest	11.9us-gaap_InvestmentIncomeInterest
Gains (loss) on foreign exchange transactions	$ (8.5)	$ 3.3	$ 13.9	$ 11.3