INTEREST AND OTHER EXPENSE (INCOME), NET (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
INTEREST AND OTHER EXPENSE (INCOME), NET
Interest expense	$ 15.8	$ 18.3	$ 47.1	$ 51.1
Interest income	3.7	5.8	15.4	13.8
Gains on foreign exchange transactions	6.3	11.6	13.9	33.3
Other income and expense, net	25.8	3.1	43.0	15.2
Gain for the cumulative fair value adjustment of entity warrants to purchase common shares	$ 41.8		$ 64.8