Goodwill and acquisition-related intangibles (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012	Dec. 31, 2012
Goodwill [Line Items]
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
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	3,002,000,000			3,002,000,000			3,043,000,000
Acquisition-related intangibles: Accumulated Amortization	614,000,000			614,000,000			485,000,000
Acquisition-related intangibles: Net	2,388,000,000			2,388,000,000			2,558,000,000
Amortization of acquisition-related intangibles	85,000,000		86,000,000	170,000,000		171,000,000
Developed technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	2,145,000,000			2,145,000,000			2,145,000,000
Acquisition-related intangibles: Accumulated Amortization	413,000,000			413,000,000			312,000,000
Acquisition-related intangibles: Net	1,732,000,000			1,732,000,000			1,833,000,000
Customer relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	821,000,000			821,000,000			821,000,000
Acquisition-related intangibles: Accumulated Amortization	188,000,000			188,000,000			137,000,000
Acquisition-related intangibles: Net	633,000,000			633,000,000			684,000,000
Other intangibles [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	17,000,000			17,000,000			46,000,000
Acquisition-related intangibles: Accumulated Amortization	13,000,000			13,000,000			36,000,000
Acquisition-related intangibles: Net	4,000,000			4,000,000			10,000,000
In-process R&D [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Gross Carrying Amount	19,000,000	[1]		19,000,000	[1]		31,000,000	[1]
Acquisition-related intangibles: Net	$ 19,000,000	[1]		$ 19,000,000	[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
Minimum [Member] | Other intangibles [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Acquisition-related intangibles: Amortization Period				2 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 will be expensed.