Debt - Non-Recourse Debt Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Mar. 31, 2014
Debt Instrument [Line Items]
Debt Default Amount		$ 1,017,000,000
Nonrecourse Debt [Member] | Tiete Subsidiary [Member]
Debt Instrument [Line Items]
Issued new debt		129,000,000
Repayments of debt	52,000,000
Nonrecourse Debt [Member] | Gener Subsidiary [Member]
Debt Instrument [Line Items]
Issued new debt		129,000,000
Repayments of debt	149,000,000
Nonrecourse Debt [Member] | Construction Loans [Member] | Mong Duong Subsidiary [Member]
Debt Instrument [Line Items]
Issued new debt		143,000,000
Sonel Subsidiary [Member] | Discontinued Operations [Member] | Nonrecourse Debt [Member]
Debt Instrument [Line Items]
Net Assets		487,000,000
Sonel Subsidiary [Member] | Discontinued Operations [Member] | Covenant Violation [Member] | Nonrecourse Debt [Member]
Debt Instrument [Line Items]
Debt Default Amount		236,000,000
Kribi Subsidiary [Member] | Discontinued Operations [Member] | Nonrecourse Debt [Member]
Debt Instrument [Line Items]
Net Assets		(5,000,000)
Kribi Subsidiary [Member] | Discontinued Operations [Member] | Covenant Violation [Member] | Nonrecourse Debt [Member]
Debt Instrument [Line Items]
Debt Default Amount		$ 251,000,000