Business Combinations, Intangibles and Goodwill - Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 4,365	$ 4,276
Accumulated Amortization	(2,534)	(2,241)
Net Book Value	1,831	2,035
Purchased Technology
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	2,327	2,233
Accumulated Amortization	(1,373)	(1,207)
Net Book Value	954	1,026
Patents
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	225	225
Accumulated Amortization	(98)	(87)
Net Book Value	127	138
Software Licenses
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	100	96
Accumulated Amortization	(90)	(88)
Net Book Value	10	8
Trademarks And Tradenames
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	171	173
Accumulated Amortization	(114)	(102)
Net Book Value	57	71
Customer Relationships And Customer Lists
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	1,370	1,378
Accumulated Amortization	(822)	(724)
Net Book Value	548	654
Leasehold Interest
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	145	145
Accumulated Amortization	(10)	(7)
Net Book Value	135	138
Other Intangible Assets
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	27	26
Accumulated Amortization	(27)	(26)
Net Book Value	$ 0	$ 0