Debt (Non-Recourse Debt Carrying Amounts and Terms) (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Non Recourse Debt Total	[1]	$ 15,792	$ 15,600
Non-recourse Debt Current Maturities		(2,529)	(1,982)
Non-recourse debt - noncurrent, balance at variable interest entities		13,263	13,618
Derivative, notional amount		$ 3,200
Interest rate swap, fixed minimum interest rate		2.87%
Interest rate swap, fixed maximum interest rate		8.24%
Variable Rate Debt | Bank loans
Debt Instrument [Line Items]
Weighted Average Interest Rate	[2]	4.37%
Non Recourse Debt Total	[2]	$ 2,352	1,893
Variable Rate Debt | Notes and bonds
Debt Instrument [Line Items]
Weighted Average Interest Rate	[2]	14.98%
Non Recourse Debt Total	[2]	$ 1,474	1,912
Variable Rate Debt | Debt to (or guaranteed by) multilateral, export credit agencies or development banks
Debt Instrument [Line Items]
Weighted Average Interest Rate	[2],[3]	2.39%
Non Recourse Debt Total	[2],[3]	$ 3,078	2,375
Variable Rate Debt | Other
Debt Instrument [Line Items]
Weighted Average Interest Rate	[2]	12.65%
Non Recourse Debt Total	[2]	$ 47	668
Fixed Rate Debt | Bank loans
Debt Instrument [Line Items]
Weighted Average Interest Rate		5.11%
Non Recourse Debt Total		$ 558	750
Fixed Rate Debt | Notes and bonds
Debt Instrument [Line Items]
Weighted Average Interest Rate		5.54%
Non Recourse Debt Total		$ 7,948	7,654
Fixed Rate Debt | Debt to (or guaranteed by) multilateral, export credit agencies or development banks
Debt Instrument [Line Items]
Weighted Average Interest Rate	[3]	5.39%
Non Recourse Debt Total	[3]	$ 309	259
Fixed Rate Debt | Other
Debt Instrument [Line Items]
Weighted Average Interest Rate		8.66%
Non Recourse Debt Total		$ 26	$ 89

[1] .

[2] (1)The interest rate on variable rate debt represents the total of a variable component that is based on changes in an interest rate index and of a fixed component. The Company has interest rate swaps and option agreements in an aggregate notional principal amount of approximately $3.2 billion on non-recourse debt outstanding at December 31, 2015. These agreements economically fix the variable component of the interest rates on the portion of the variable-rate debt being hedged so that the total interest rate on that debt has been fixed at rates ranging from approximately 2.87% to 8.24%. These agreements expire at various dates from 2016 through 2033

[3] (2)Multilateral loans include loans funded and guaranteed by bilaterals, multilaterals, development banks and other similar institutions.