Debt Obligations - Narrative (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Estimate of Fair Value, Fair Value Disclosure	Dec. 31, 2013 Estimate of Fair Value, Fair Value Disclosure	Mar. 31, 2014 Carrying (Reported) Amount, Fair Value Disclosure [Member]	Dec. 31, 2013 Carrying (Reported) Amount, Fair Value Disclosure [Member]	Mar. 31, 2014 Junior Subordinated Debt [Member]	Mar. 31, 2014 7.60% Senior Notes, due February 1, 2024 [Member]	Jan. 10, 2014 7.60% Senior Notes, due February 1, 2024 [Member]	Mar. 31, 2014 8.25% Senior Notes, due November 14, 2029 [Member]	Jan. 10, 2014 8.25% Senior Notes, due November 14, 2029 [Member]	Mar. 31, 2014 Southern Union [Member]	Feb. 19, 2014 ETP
Debt Instrument
Debt Instrument, Fair Value Disclosure			$ 1,260,000,000	$ 2,380,000,000
Long term debt, amount outstanding					1,200,000,000	2,340,000,000
Debt Instrument, Interest Rate, Stated Percentage								7.60%	7.60%	8.25%	8.25%
Senior Notes, Noncurrent							54,000,000	83,000,000		33,000,000
Unamortized Net Premiums And Fair Value Adjustments												10,000,000
Notes Payable, Related Parties, Noncurrent	$ 0	$ 1,090,000,000											$ 1,090,000,000