Business Combinations, Intangibles and Goodwill - Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 5,003	$ 4,412
Accumulated Amortization	(2,934)	(2,632)
Net Book Value	2,069	1,780
Purchased technology
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	2,807	2,356
Accumulated Amortization	(1,607)	(1,429)
Net Book Value	1,200	927
Patents
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	225	225
Accumulated Amortization	(113)	(102)
Net Book Value	112	123
Software licenses
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	105	101
Accumulated Amortization	(92)	(90)
Net Book Value	13	11
Trademarks and tradenames
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	212	171
Accumulated Amortization	(131)	(118)
Net Book Value	81	53
Customer relationships and customer lists
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	1,463	1,386
Accumulated Amortization	(944)	(855)
Net Book Value	519	531
Leasehold interest
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	147	145
Accumulated Amortization	(15)	(11)
Net Book Value	132	134
Other
Schedule of Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount	44	28
Accumulated Amortization	(32)	(27)
Net Book Value	$ 12	$ 1