Share-Based Compensation (Schedule Of Share Bonus Award Activity) (Details) (USD $)	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Share-Based Compensation [Abstract]
Unvested share bonus awards outstanding, beginning of fiscal year, Shares	13,801,942	8,801,609	10,456,905
Granted, Shares	9,213,456	9,739,375	523,229
Vested, Shares	(2,555,165)	(2,758,593)	(1,299,357)
Forfeited, Shares	(4,494,965)	(1,980,449)	(879,168)
Unvested share bonus awards outstanding, end of fiscal year, Shares	15,965,268	13,801,942	8,801,609
Unvested share bonus awards outstanding, beginning of fiscal year, Price	$ 8.04	$ 10.31	$ 10.31
Granted, Price	$ 6.78	$ 7.01	$ 7.08
Vested, Price	$ 9.34	$ 10.37	$ 8.98
Forfeited, Price	$ 8.60	$ 9.74	$ 10.40
Unvested share bonus awards outstanding, end of fiscal year, Price	$ 6.91	$ 8.04	$ 10.31