SHARE-BASED COMPENSATION (Details 4) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
SHARE-BASED COMPENSATION
Outstanding, beginning of fiscal year, Options (in shares)	23,612,872	34,405,564	43,933,660
Granted (in shares)	15,000		19,000
Exercised, Options (in shares)	(3,600,900)	(6,572,383)	(5,398,331)
Forfeited, Options (in shares)	(4,034,078)	(4,220,309)	(4,148,765)
Outstanding, end of fiscal year, Options (in shares)	15,992,894	23,612,872	34,405,564
Options exercisable, end of fiscal year, Options (in shares)	15,959,173	23,373,101	33,662,480
Outstanding, beginning of fiscal year, Price (in dollars per share)	$ 8.57	$ 8.29	$ 7.78
Granted, Price (in dollars per share)	$ 11.11		$ 6.57
Exercised, Price (in dollars per share)	$ 6.53	$ 4.28	$ 4.12
Forfeited, Price (in dollars per share)	$ 13.17	$ 12.93	$ 8.32
Outstanding, end of fiscal year, Price (in dollars per share)	$ 7.81	$ 8.57	$ 8.29
Options exercisable, end of fiscal year, Price (in dollars per share)	$ 7.81	$ 8.58	$ 8.31
Aggregate intrinsic value of options exercisable	$ 16.3	$ 24.7	$ 13.0
Cash received from option exercises	$ 23.5	$ 28.1	$ 22.3