Intangible Assets Including Goodwill (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Intangible asset balances by major asset class:
Gross Carrying Amount	$ 6,558		$ 6,806
Accumulated Amortization	(3,567)		(3,702)
Net Carrying Amount	2,991		3,104
Capitalized software
Intangible asset balances by major asset class:
Gross Carrying Amount	1,385		1,375
Accumulated Amortization	(646)		(679)
Net Carrying Amount	739		696
Client relationships
Intangible asset balances by major asset class:
Gross Carrying Amount	2,204		2,208
Accumulated Amortization	(1,335)		(1,271)
Net Carrying Amount	870		937
Completed technology
Intangible asset balances by major asset class:
Gross Carrying Amount	2,622		2,831
Accumulated Amortization	(1,407)		(1,533)
Net Carrying Amount	1,215		1,298
Patents/trademarks
Intangible asset balances by major asset class:
Gross Carrying Amount	323		374
Accumulated Amortization	(172)		(214)
Net Carrying Amount	150		161
Other
Intangible asset balances by major asset class:
Gross Carrying Amount	24	[1]	18	[1]
Accumulated Amortization	(7)	[1]	(6)	[1]
Net Carrying Amount	$ 17	[1]	$ 12	[1]

[1] Other intangibles are primarily acquired proprietary and nonproprietary business processes, methodologies and systems.