Goodwill and acquisition-related intangibles (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, net	$ 4,362,000,000			$ 4,362,000,000
Goodwill, accumulated impairment	90,000,000			90,000,000
Goodwill, impairment loss	0		0
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	2,957,000,000			2,991,000,000
Acquisition-related intangibles: Accumulated Amortization	815,000,000			768,000,000
Acquisition-related intangibles: Net	2,142,000,000			2,223,000,000
Amortization of acquisition-related intangibles	81,000,000		85,000,000
Developed technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	2,126,000,000			2,157,000,000
Acquisition-related intangibles: Accumulated Amortization	550,000,000			526,000,000
Acquisition-related intangibles: Net	1,576,000,000			1,631,000,000
Customer relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	818,000,000			821,000,000
Acquisition-related intangibles: Accumulated Amortization	262,000,000			239,000,000
Acquisition-related intangibles: Net	556,000,000			582,000,000
Other intangibles [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	5,000,000			5,000,000
Acquisition-related intangibles: Accumulated Amortization	3,000,000			3,000,000
Acquisition-related intangibles: Net	2,000,000			2,000,000
In-process R&D [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	8,000,000	[1]		8,000,000	[1]
Acquisition-related intangibles: Net	$ 8,000,000	[1]		$ 8,000,000	[1]
Minimum [Member] | Developed technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Amortization Period	5 years
Minimum [Member] | Customer relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Amortization Period	5 years
Minimum [Member] | Other intangibles [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Amortization Period	5 years
Maximum [Member] | Developed technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Amortization Period	10 years
Maximum [Member] | Customer relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Amortization Period	8 years
Maximum [Member] | Other intangibles [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Amortization Period	5 years

[1] In-process R&D is not amortized until the associated project has been completed. Alternatively, if the associated project is determined not to be viable, it is expensed.