Goodwill and acquisition-related intangibles (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, net	$ 4,362,000,000			$ 4,362,000,000			$ 4,362,000,000
Goodwill, Accumulated Impairment	90,000,000			90,000,000			90,000,000
Goodwill, Impairment Loss	0			0
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	2,990,000,000			2,990,000,000			3,043,000,000
Acquisition-related intangibles: Accumulated Amortization	685,000,000			685,000,000			485,000,000
Acquisition-related intangibles: Net	2,305,000,000			2,305,000,000			2,558,000,000
Amortization of acquisition-related intangibles	83,000,000		86,000,000	253,000,000		257,000,000
Developed technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	2,153,000,000			2,153,000,000			2,145,000,000
Acquisition-related intangibles: Accumulated Amortization	469,000,000			469,000,000			312,000,000
Acquisition-related intangibles: Net	1,684,000,000			1,684,000,000			1,833,000,000
Customer relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	820,000,000			820,000,000			821,000,000
Acquisition-related intangibles: Accumulated Amortization	213,000,000			213,000,000			137,000,000
Acquisition-related intangibles: Net	607,000,000			607,000,000			684,000,000
Other intangibles [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Amortization Period				5 years
Acquisition-related intangibles: Gross Carrying Amount	5,000,000			5,000,000			46,000,000
Acquisition-related intangibles: Accumulated Amortization	3,000,000			3,000,000			36,000,000
Acquisition-related intangibles: Net	2,000,000			2,000,000			10,000,000
In-process R&D [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	12,000,000	[1]		12,000,000	[1]		31,000,000	[1]
Acquisition-related intangibles: Net	$ 12,000,000	[1]		$ 12,000,000	[1]		$ 31,000,000	[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
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

[1] In-process R&D is not amortized until the associated project has been successfully completed, at which point it would be reclassified to developed technology. Alternatively, if the associated project is determined not to be viable, it will be expensed.