Accumulated Other Comprehensive Income (AOCI) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax at beginning of period	$ (639)	$ (254)
OCI before reclassifications	5	(264)
Tax (benefit) expense on OCI	15	(2)
Cost of sales	(801)	(826)
Other income (expense), net	38	29
Income taxes	79	153
Other comprehensive income	17	(267)
Accumulated Other Comprehensive Income (Loss), Net of Tax at end of period	(622)	(521)
Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Income taxes	2	(1)
Other comprehensive income	17	(267)
Reclassification out of Accumulated Other Comprehensive Income | Cost of Sales
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cost of sales	(4)	2
Reclassification out of Accumulated Other Comprehensive Income | Other Income (expense)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other income (expense), net	(1)	(2)
Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax at beginning of period	0	3
OCI before reclassifications	2	4
Tax (benefit) expense on OCI	(1)	(1)
Accumulated Other Comprehensive Income (Loss), Net of Tax at end of period	0	4
Marketable Securities | Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Income taxes	0	0
Other comprehensive income	0	1
Marketable Securities | Reclassification out of Accumulated Other Comprehensive Income | Cost of Sales
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cost of sales	0	0
Marketable Securities | Reclassification out of Accumulated Other Comprehensive Income | Other Income (expense)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other income (expense), net	(1)	(2)
Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax at beginning of period	(119)	(136)
OCI before reclassifications	(3)	15
Tax (benefit) expense on OCI	0	(3)
Accumulated Other Comprehensive Income (Loss), Net of Tax at end of period	(120)	(123)
Pension Plans | Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Income taxes	0	(1)
Other comprehensive income	(1)	13
Pension Plans | Reclassification out of Accumulated Other Comprehensive Income | Cost of Sales
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cost of sales	2	2
Pension Plans | Reclassification out of Accumulated Other Comprehensive Income | Other Income (expense)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other income (expense), net	0	0
Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax at beginning of period	4	13
OCI before reclassifications	(22)	(1)
Tax (benefit) expense on OCI	6	2
Accumulated Other Comprehensive Income (Loss), Net of Tax at end of period	(16)	14
Hedges | Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Income taxes	2	0
Other comprehensive income	(20)	1
Hedges | Reclassification out of Accumulated Other Comprehensive Income | Cost of Sales
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cost of sales	(6)	0
Hedges | Reclassification out of Accumulated Other Comprehensive Income | Other Income (expense)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other income (expense), net	0	0
Financial Statement Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax at beginning of period	(524)	(134)
OCI before reclassifications	28	(282)
Tax (benefit) expense on OCI	10	0
Accumulated Other Comprehensive Income (Loss), Net of Tax at end of period	(486)	(416)
Financial Statement Translation | Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Income taxes	0	0
Other comprehensive income	38	(282)
Financial Statement Translation | Reclassification out of Accumulated Other Comprehensive Income | Cost of Sales
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cost of sales	0	0
Financial Statement Translation | Reclassification out of Accumulated Other Comprehensive Income | Other Income (expense)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other income (expense), net	$ 0	$ 0