Intangible Assets Including Goodwill (Details 2) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Intangible asset balances by major asset class:
Gross Carrying Amount	$ 6,626	$ 6,806
Accumulated Amortization	(3,687)	(3,702)
Net Carrying Amount	2,938	3,104
Capitalized software
Intangible asset balances by major asset class:
Gross Carrying Amount	1,367	1,375
Accumulated Amortization	(622)	(679)
Net Carrying Amount	745	696
Client relationships
Intangible asset balances by major asset class:
Gross Carrying Amount	2,234	2,208
Accumulated Amortization	(1,387)	(1,271)
Net Carrying Amount	847	937
Completed technology
Intangible asset balances by major asset class:
Gross Carrying Amount	2,667	2,831
Accumulated Amortization	(1,487)	(1,533)
Net Carrying Amount	1,180	1,298
Patents/trademarks
Intangible asset balances by major asset class:
Gross Carrying Amount	330	374
Accumulated Amortization	(183)	(214)
Net Carrying Amount	146	161
Other
Intangible asset balances by major asset class:
Gross Carrying Amount	28	18
Accumulated Amortization	(8)	(6)
Net Carrying Amount	$ 20	$ 12