Intangible Assets Including Goodwill (Details 2) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Intangible asset balances by major asset class:
Gross Carrying Amount	$ 5,753	$ 6,806
Accumulated Amortization	(2,977)	(3,702)
Net Carrying Amount	2,775	3,104
Capitalized software
Intangible asset balances by major asset class:
Gross Carrying Amount	1,329	1,375
Accumulated Amortization	(593)	(679)
Net Carrying Amount	736	696
Client relationships
Intangible asset balances by major asset class:
Gross Carrying Amount	1,670	2,208
Accumulated Amortization	(886)	(1,271)
Net Carrying Amount	784	937
Completed technology
Intangible asset balances by major asset class:
Gross Carrying Amount	2,431	2,831
Accumulated Amortization	(1,333)	(1,533)
Net Carrying Amount	1,098	1,298
Patents/trademarks
Intangible asset balances by major asset class:
Gross Carrying Amount	291	374
Accumulated Amortization	(156)	(214)
Net Carrying Amount	134	161
Other
Intangible asset balances by major asset class:
Gross Carrying Amount	32	18
Accumulated Amortization	(9)	(6)
Net Carrying Amount	$ 23	$ 12