Intangibles and Goodwill - Intangible Assets, Excluding Goodwill (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Intangible Assets [Line Items]
Gross Carrying Amount	$ 5,163	$ 4,412
Accumulated Amortization	(3,038)	(2,632)
Net Book Value	2,125	1,780
Purchased / Developed technology
Intangible Assets [Line Items]
Gross Carrying Amount	2,935	2,356
Accumulated Amortization	(1,668)	(1,429)
Net Book Value	1,267	927
Patents
Intangible Assets [Line Items]
Gross Carrying Amount	225	225
Accumulated Amortization	(117)	(102)
Net Book Value	108	123
Software licenses
Intangible Assets [Line Items]
Gross Carrying Amount	108	101
Accumulated Amortization	(93)	(90)
Net Book Value	15	11
Trademarks and tradenames
Intangible Assets [Line Items]
Gross Carrying Amount	226	171
Accumulated Amortization	(136)	(118)
Net Book Value	90	53
Customer relationships and customer lists
Intangible Assets [Line Items]
Gross Carrying Amount	1,473	1,386
Accumulated Amortization	(974)	(855)
Net Book Value	499	531
Leasehold interest
Intangible Assets [Line Items]
Gross Carrying Amount	152	145
Accumulated Amortization	(16)	(11)
Net Book Value	136	134
Other
Intangible Assets [Line Items]
Gross Carrying Amount	44	28
Accumulated Amortization	(34)	(27)
Net Book Value	$ 10	$ 1