Restructuring and Other Charges (Restructuring Reserve Rollforward) (Details) (USD $) In Millions	12 Months Ended																												36 Months Ended	12 Months Ended
	Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2009	Mar. 31, 2011 Fiscal 2011 Restructuring [Member] Workforce [Member]	Mar. 31, 2010 Fiscal 2011 Restructuring [Member] Workforce [Member]	Mar. 31, 2009 Fiscal 2011 Restructuring [Member] Workforce [Member]	Mar. 31, 2011 Fiscal 2011 Restructuring [Member] Other Reorganizational Cost [Member]	Mar. 31, 2010 Fiscal 2011 Restructuring [Member] Other Reorganizational Cost [Member]	Mar. 31, 2009 Fiscal 2011 Restructuring [Member] Other Reorganizational Cost [Member]	Mar. 31, 2011 Fiscal 2010 Restructuring [Member] Facilities-Related [Member]	Mar. 31, 2010 Fiscal 2010 Restructuring [Member] Facilities-Related [Member]	Mar. 31, 2009 Fiscal 2010 Restructuring [Member] Facilities-Related [Member]	Mar. 31, 2011 Fiscal 2010 Restructuring [Member] Workforce [Member]	Mar. 31, 2010 Fiscal 2010 Restructuring [Member] Workforce [Member]	Mar. 31, 2009 Fiscal 2010 Restructuring [Member] Workforce [Member]	Mar. 31, 2011 Fiscal 2010 Restructuring [Member] Other Reorganizational Cost [Member]	Mar. 31, 2010 Fiscal 2010 Restructuring [Member] Other Reorganizational Cost [Member]	Mar. 31, 2009 Fiscal 2010 Restructuring [Member] Other Reorganizational Cost [Member]	Mar. 31, 2011 Fiscal 2009 Restructuring [Member] Facilities-Related [Member]	Mar. 31, 2010 Fiscal 2009 Restructuring [Member] Facilities-Related [Member]	Mar. 31, 2009 Fiscal 2009 Restructuring [Member] Facilities-Related [Member]	Mar. 31, 2011 Fiscal 2009 Restructuring [Member] Workforce [Member]	Mar. 31, 2010 Fiscal 2009 Restructuring [Member] Workforce [Member]	Mar. 31, 2009 Fiscal 2009 Restructuring [Member] Workforce [Member]	Mar. 31, 2011 Fiscal 2009 Restructuring [Member] Other Reorganizational Cost [Member]	Mar. 31, 2010 Fiscal 2009 Restructuring [Member] Other Reorganizational Cost [Member]	Mar. 31, 2009 Fiscal 2009 Restructuring [Member] Other Reorganizational Cost [Member]	Mar. 31, 2009 Other Restructurings and Reorganization [Member]	Mar. 31, 2011 Other Restructurings and Reorganization [Member]	Mar. 31, 2011 Other Restructurings and Reorganization [Member] Facilities-Related [Member]	Mar. 31, 2010 Other Restructurings and Reorganization [Member] Facilities-Related [Member]	Mar. 31, 2009 Other Restructurings and Reorganization [Member] Facilities-Related [Member]	Mar. 31, 2011 Other Restructurings and Reorganization [Member] Workforce [Member]	Mar. 31, 2010 Other Restructurings and Reorganization [Member] Workforce [Member]	Mar. 31, 2009 Other Restructurings and Reorganization [Member] Workforce [Member]	Mar. 31, 2011 Other Restructurings and Reorganization [Member] Other Reorganizational Cost [Member]	Mar. 31, 2010 Other Restructurings and Reorganization [Member] Other Reorganizational Cost [Member]	Mar. 31, 2009 Other Restructurings and Reorganization [Member] Other Reorganizational Cost [Member]
Beginning balance	$ 29	$ 23	$ 14	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 11	$ 0	$ 0	$ 8	$ 0	$ 0	$ 7	$ 0	$ 0	$ 3	$ 5	$ 0	$ 0	$ 8	$ 0	$ 0	$ 0	$ 0			$ 0	$ 7	$ 9	$ 0	$ 0	$ 1	$ 0	$ 3	$ 4
Charges to operations	161	140	80	13	0	0	135	0	0	0	22	0	0	62	0	13	32	0	0	13	7	0	1	32	0	0	2			0	3	23	0	0	4	0	7	12
Charges settled in cash	(70)	(62)	(46)	(8)	0	0	(32)	0	0	(6)	(2)	0	(8)	(29)	0	(15)	(1)	0	(1)	(11)	(1)	0	(9)	(24)	0	0	0		(31)	0	0	(3)	0	0	(5)	0	(10)	(13)
Charges settled in non-cash	(3)	(65)	(25)	(2)	0	0	(2)	0	0	1	(9)	0	0	(25)	0	0	(24)	0	0	(4)	(1)	0	0	0	0	0	(2)			0	(3)	(22)	0	0	0	0	0	0
Accrual reclassification		(7)			0			0			0			0			0			0			0			0		7			(7)			0			0
Ending balance	$ 117	$ 29	$ 23	$ 3	$ 0	$ 0	$ 101	$ 0	$ 0	$ 6	$ 11	$ 0	$ 0	$ 8	$ 0	$ 5	$ 7	$ 0	$ 2	$ 3	$ 5	$ 0	$ 0	$ 8	$ 0	$ 0	$ 0			$ 0	$ 0	$ 7	$ 0	$ 0	$ 0	$ 0	$ 0	$ 3