Long-Lived Assets 2 (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Capitalized software and other intangible assets
Gross amortizable assets	$ 8,113	$ 7,952
Less: Fully amortized assets	6,095	5,825
Remaining amortizable assets	2,018	2,127
Accumulated amortization on remaining amortizable assets	955	885
Net assets	1,063	1,242
Purchased Software Products [Member]
Capitalized software and other intangible assets
Gross amortizable assets	5,706	5,604
Less: Fully amortized assets	4,849	4,735
Remaining amortizable assets	857	869
Accumulated amortization on remaining amortizable assets	309	309
Net assets	548	560
Internally Developed Software Products [Member]
Capitalized software and other intangible assets
Gross amortizable assets	1,561	1,528
Less: Fully amortized assets	757	661
Remaining amortizable assets	804	867
Accumulated amortization on remaining amortizable assets	397	327
Net assets	407	540
Other Intangible Assets [Member]
Capitalized software and other intangible assets
Gross amortizable assets	846	820
Less: Fully amortized assets	489	429
Remaining amortizable assets	357	391
Accumulated amortization on remaining amortizable assets	249	249
Net assets	$ 108	$ 142