Debt (Non-Recourse Debt Maturity Schedule) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Debt Details [Line Items]
Non Recourse Debt Total	$ 15,380	[1]	$ 14,759	[1]
2014
Debt Details [Line Items]
Non Recourse Debt Total	2,062
2015
Debt Details [Line Items]
Non Recourse Debt Total	692
2016
Debt Details [Line Items]
Non Recourse Debt Total	2,422
2017
Debt Details [Line Items]
Non Recourse Debt Total	792
2018
Debt Details [Line Items]
Non Recourse Debt Total	1,444
Thereafter
Debt Details [Line Items]
Non Recourse Debt Total	$ 7,968

[1] Non-recourse debt of $658 million as of December 31, 2013 was excluded from non-recourse debt and included in current and noncurrent liabilities of held for sale and discontinued businesses in the accompanying Consolidated Balance Sheets. There were no amounts excluded in 2012.