Intangible Assets Including Goodwill (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Intangible asset balances by major asset class:
Gross Carrying Amount	$ 5,500		$ 5,500		$ 5,649
Accumulated Amortization	(2,467)		(2,467)		(2,161)
Net Carrying Amount	3,033		3,033		3,488
Net carrying amount increase/(decrease)			(455)
Intangible asset amortization expense	307	289	926	859
Intangible assets retired and fully amortized			620
Capitalized software
Intangible asset balances by major asset class:
Gross Carrying Amount	1,498		1,498		1,558
Accumulated Amortization	(693)		(693)		(726)
Net Carrying Amount	805		805		831
Client-related
Intangible asset balances by major asset class:
Gross Carrying Amount	1,612		1,612		1,709
Accumulated Amortization	(711)		(711)		(647)
Net Carrying Amount	901		901		1,062
Completed technology
Intangible asset balances by major asset class:
Gross Carrying Amount	2,122		2,122		2,111
Accumulated Amortization	(943)		(943)		(688)
Net Carrying Amount	1,179		1,179		1,422
In-process R and D
Intangible asset balances by major asset class:
Gross Carrying Amount	22		22		21
Accumulated Amortization	(1)		(1)		0
Net Carrying Amount	21		21		21
Patents/trademarks
Intangible asset balances by major asset class:
Gross Carrying Amount	216		216		211
Accumulated Amortization	(97)		(97)		(71)
Net Carrying Amount	119		119		140
Other intangible assets
Intangible asset balances by major asset class:
Gross Carrying Amount	31		31		39
Accumulated Amortization	(23)		(23)		(28)
Net Carrying Amount	$ 8		$ 8		$ 11