Equity Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unfunded pension obligation, Net of Tax	$ (292)		$ (292)		$ (295)
Foreign currency translation adjustment, Net of Tax	(3,080)		(3,080)		(2,595)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3,758)		(3,758)		(3,286)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(519)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(386)		(386)		$ (396)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			34
Other Comprehensive Income (Loss), Effect of Change in Accounting Principle, Net of Taxes			13
Other comprehensive income (loss), before cumulative effect of change in accounting principle			(485)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(21)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			31
Other Comprehensive Income (Loss), Effect of Change in Accounting Principle, Net of Taxes			0
Other comprehensive income (loss), before cumulative effect of change in accounting principle			10
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			3
Other Comprehensive Income (Loss), Effect of Change in Accounting Principle, Net of Taxes			0
Other comprehensive income (loss), before cumulative effect of change in accounting principle			3
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(498)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			0
Other Comprehensive Income (Loss), Effect of Change in Accounting Principle, Net of Taxes			13
Other comprehensive income (loss), before cumulative effect of change in accounting principle			(498)
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	$ (9)	$ (33)	$ (34)	$ (8)