Intangible Assets Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amount	$ 1,049	$ 1,139
Amortization	(801)	(783)
Assets	248	356
Acquired technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amount	373	386
Amortization	(300)	(291)
Assets	73	95
Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Amount	177	234
Amortization	(166)	(176)
Assets	11	58
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Amount	215	233
Amortization	(134)	(123)
Assets	81	110
Customer relationships and contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Amount	193	198
Amortization	(144)	(139)
Assets	49	59
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Amount	91	88
Amortization	(57)	(54)
Assets	$ 34	$ 34