Severance and Exit Costs 2 (Details) (USD $) In Millions, unless otherwise specified													1 Months Ended	5 Months Ended
	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Mar. 31, 2012	Sep. 30, 2013 Severance Charges [Member]	Mar. 31, 2013 Severance Charges [Member]	Sep. 30, 2012 Severance Charges [Member]	Mar. 31, 2012 Severance Charges [Member]	Sep. 30, 2013 Facility Exit Charges [Member]	Mar. 31, 2013 Facility Exit Charges [Member]	Sep. 30, 2012 Facility Exit Charges [Member]	Mar. 31, 2012 Facility Exit Charges [Member]	May 31, 2013 Fiscal Year 2014 Re-Balancing Plan [Member] Employee	Sep. 30, 2013 Fiscal Year 2014 Re-Balancing Plan [Member]	Sep. 30, 2013 Fiscal Year 2014 Re-Balancing Plan [Member] Severance Charges [Member]	Sep. 30, 2013 Fiscal Year 2014 Re-Balancing Plan [Member] Facility Exit Charges [Member]	Sep. 30, 2013 Plans and Actions Prior to Fiscal Year 2014 [Member] Severance Charges [Member]	Sep. 30, 2012 Plans and Actions Prior to Fiscal Year 2014 [Member] Severance Charges [Member]	Sep. 30, 2013 Plans and Actions Prior to Fiscal Year 2014 [Member] Facility Exit Charges [Member]	Sep. 30, 2012 Plans and Actions Prior to Fiscal Year 2014 [Member] Facility Exit Charges [Member]
Severance and Exit Costs (Textual) [Abstract]
Workforce re-balancing													1,200
Cost incurred to date															$ 103	$ 19
Expected cost														150	130	20
Accrued balance	$ 85	$ 39	$ 35	$ 53	$ 52	$ 16	$ 3	$ 13	$ 33	$ 23	$ 32	$ 40					$ 7	$ 3	$ 15	$ 32