v2.4.0.6

Related Party Transactions Notes Receivable (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Plantation Pipe Line Company [Member]	Dec. 31, 2012 Southern LNG Company, L.L.C.(SLNG) [Member]	Mar. 31, 2013 Southern LNG Company, L.L.C.(SLNG) [Member]	May 25, 2012 Southern LNG Company, L.L.C.(SLNG) [Member]	Mar. 31, 2013 Southern LNG Company, L.L.C.(SLNG) [Member]	Mar. 31, 2013 Gulf LNG Holdings Group LLC [Member]
Related Party Transaction [Line Items]
Ownership interest			51.17%				50.00%
Notes Receivable, Related Parties			$ 49	$ 10	$ 10	$ 85
Proceeds from Related Party Debt	10	0		75
Related party transaction, rate			4.25%
Notes receivable, balloon payment, related parties			45
Notes receivable, related parties, current			$ 1
Debt Instrument, Interest Rate, Stated Percentage								12.00%

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Interest rate stated in the contractual debt agreement.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

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