Equity Accumulated Other Comprehensive Loss (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	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ (1)		$ (1)			$ 0
Other comprehensive income, before balance sheet reclassification			(334)
Other Comprehensive Income, Balance Sheet Reclassification			40	[1]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3,176)		(3,176)			(2,882)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	(1)	0	(1)		0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(342)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(367)		(367)			(307)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			8
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income, before balance sheet reclassification			(1)
Other Comprehensive Income, Balance Sheet Reclassification			0	[1]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(1)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			0
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income, before balance sheet reclassification			(79)
Other Comprehensive Income, Balance Sheet Reclassification			19	[1]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(131)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			52
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income, before balance sheet reclassification			15
Other Comprehensive Income, Balance Sheet Reclassification			0	[1]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			8
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			7
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income, before balance sheet reclassification			(269)
Other Comprehensive Income, Balance Sheet Reclassification			21	[1]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(218)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			$ (51)

[1] (1) Reclassification resulting from Silver Ridge transaction. See Note 7 — Investments In and Advances to Affiliates for further information.