Reclassification Adjustments Out of Accumulated Other Comprehensive Income (AOCI) Reclassification Adjustments Out of Accumulated Other Comprehensive Income (AOCI) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 231		$ 232
Other comprehensive income (OCI)	(302)		(306)
Income taxes	368	34	444	161
Other comprehensive loss	(305)	115	(306)	17
Accumulated Other Comprehensive Income (Loss), Net of Tax	(74)		(74)
Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	7
Other comprehensive income (OCI)	0		11
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	0		(1)
Accumulated Other Comprehensive Income (Loss), Net of Tax	4		4
Pension Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(81)		(81)
Other comprehensive income (OCI)	3		0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	1		1
Accumulated Other Comprehensive Income (Loss), Net of Tax	(76)		(76)
Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(5)		7
Other comprehensive income (OCI)	7		(9)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	(3)		4
Accumulated Other Comprehensive Income (Loss), Net of Tax	0		0
Financial Statement Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	310		306
Other comprehensive income (OCI)	(312)		(308)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	0		0
Accumulated Other Comprehensive Income (Loss), Net of Tax	(2)		(2)
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	(2)		4
Other comprehensive loss			(306)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income taxes	1		2
Other comprehensive loss	(305)		(306)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income taxes	1		1
Other comprehensive loss	(3)		4
Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income taxes	0		(1)
Other comprehensive loss	5		5
Reclassification out of Accumulated Other Comprehensive Income [Member] | Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income taxes	0		2
Other comprehensive loss	5		(7)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Financial Statement Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income taxes	0		0
Other comprehensive loss	(312)		(308)
Cost of Sales [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	2		1
Cost of Sales [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	0		0
Cost of Sales [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax	1		5
Cost of Sales [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	1		(4)
Cost of Sales [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Financial Statement Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	0		0
Other Income (expense) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(4)		(7)
Other Income (expense) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(4)		(7)
Other Income (expense) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Tax	0		0
Other Income (expense) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	0		0
Other Income (expense) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Financial Statement Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	$ 0		$ 0