Severance and Exit Costs (Details) (USD $) In Millions, unless otherwise specified					12 Months Ended						1 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended					1 Months Ended	12 Months Ended			25 Months Ended	12 Months Ended			25 Months Ended	1 Months Ended	12 Months Ended			68 Months Ended	12 Months Ended			68 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2009	Mar. 31, 2012 Severance [Member]	Mar. 31, 2011 Severance [Member]	Mar. 31, 2010 Severance [Member]	Mar. 31, 2012 Facility Abandonment [Member]	Mar. 31, 2011 Facility Abandonment [Member]	Mar. 31, 2010 Facility Abandonment [Member]	Jul. 31, 2011 Restructuring Activity Fiscal Plan 2012 [Member] Employee	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2012 [Member] Severance [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2012 [Member] Severance [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2012 [Member] Severance [Member] Selling and marketing [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2012 [Member] Severance [Member] Product development and enhancements [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2012 [Member] Severance [Member] General and administrative [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2012 [Member] Severance [Member] Costs of licensing and maintenance [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2012 [Member] Severance [Member] Cost of professional services [Member]	Mar. 31, 2010 Restructuring Activity Fiscal Plan 2010 [Member] Employee	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2010 [Member] Severance [Member]	Mar. 31, 2011 Restructuring Activity Fiscal Plan 2010 [Member] Severance [Member]	Mar. 31, 2010 Restructuring Activity Fiscal Plan 2010 [Member] Severance [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2010 [Member] Severance [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2010 [Member] Facility Abandonment [Member]	Mar. 31, 2011 Restructuring Activity Fiscal Plan 2010 [Member] Facility Abandonment [Member]	Mar. 31, 2010 Restructuring Activity Fiscal Plan 2010 [Member] Facility Abandonment [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2010 [Member] Facility Abandonment [Member]	Aug. 31, 2006 Restructuring Activity Fiscal Plan 2007 [Member] Employee	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2007 [Member] Severance [Member]	Mar. 31, 2011 Restructuring Activity Fiscal Plan 2007 [Member] Severance [Member]	Mar. 31, 2010 Restructuring Activity Fiscal Plan 2007 [Member] Severance [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2007 [Member] Severance [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2007 [Member] Facility Abandonment [Member]	Mar. 31, 2011 Restructuring Activity Fiscal Plan 2007 [Member] Facility Abandonment [Member]	Mar. 31, 2010 Restructuring Activity Fiscal Plan 2007 [Member] Facility Abandonment [Member]	Mar. 31, 2012 Restructuring Activity Fiscal Plan 2007 [Member] Facility Abandonment [Member]
Accrued severance and exit costs and changes in the accruals
Accrued beginning balance	$ 53	$ 55	$ 116	$ 116	$ 8	$ 54	$ 45	$ 47	$ 62	$ 71			$ 0							$ 4	$ 46	$ 0		$ 1	$ 2	$ 0			$ 4	$ 8	$ 45		$ 46	$ 60	$ 71
Expense					49	0	48	0	0	2			49	22	8	9	2	1		0	0	48		0	0	2			0	0	0		0	0	0
Change in Estimate					(8)	(3)	(4)	0	1	0			(7)							(1)	(4)	0		0	0	0			0	1	(4)		0	1	0
Payments					(36)	(42)	(35)	(11)	(19)	(19)			(31)							(3)	(37)	(2)		0	(1)	0			(2)	(5)	(33)		(11)	(18)	(19)
Accretion and other					0	(1)	0	4	3	8			0							0	(1)	0		0	0	0			0	0	0		4	3	8
Accrued ending balance	53	55	116	116	13	8	54	40	47	62		11	11							0	4	46	0	1	1	2	1		2	4	8	2	39	46	60	39
Severance and Exit Costs (Textual) [Abstract]
Workforce reduction											400								1,000									3,100
Expense					49	0	48	0	0	2			49	22	8	9	2	1		0	0	48		0	0	2			0	0	0		0	0	0
Cumulative amount recognized												$ 42											$ 43				$ 2					$ 220				$ 122