SHARE-BASED COMPENSATION (Details 3) (Stock Options, USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Stock Options
Number of Shares
Outstanding at the beginning of the period (in shares)	17,359,760
Granted (in shares)	2,535,500
Exercised (in shares)	(3,052,642)
Forfeited (in shares)	(334,063)
Expired (in shares)	(57,451)
Outstanding at the end of the period (in shares)	16,451,104	17,359,760
Exercisable at the end of the period (in shares)	10,321,840
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 13.68
Granted (in dollars per share)	$ 16.84
Exercised (in dollars per share)	$ 11.26
Forfeited (in dollars per share)	$ 14.98
Expired (in dollars per share)	$ 20.12
Outstanding at the end of the period (in dollars per share)	$ 14.57	$ 13.68
Exercisable at the end of the period (in dollars per share)	$ 14.13
Additional disclosures
Weighted average grant-date fair value of stock options granted (in dollars per share)	$ 8.11	$ 8.00	$ 5.92
Aggregate intrinsic value of stock options exercised	$ 28.1	$ 11.1	$ 2.0
Stock options expected to vest
Stock options expected to vest (in shares)	6,000,000
Weighted average exercise price (in dollars per share)	$ 15.27
Weighted average contractual remaining life	8 years 3 months 18 days
Aggregate intrinsic value	50.5
Additional disclosures
Aggregate intrinsic value of stock options exercisable	98.8
Weighted average remaining contractual term of stock options exercisable	4 years 4 months 24 days
Unrecognized compensation cost	20.3
Weighted average period for unrecognized compensation cost expected to be recognized	1 year 10 months 24 days
Cash received from option exercises	$ 34.4	$ 20.9