ETE Merger and Holdco Transaction (Narrative) (Details) (USD $)	9 Months Ended	12 Months Ended	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Mar. 31, 2012 Citrus	Dec. 31, 2012 Citrus	Mar. 25, 2012 Citrus	Oct. 05, 2012 ETE Holdco	Oct. 05, 2012 ETP Holdco
Percentage owned by equity investment				50.00%
Total merger amount					$ 2,000,000,000
Merger amount, in cash					1,900,000,000
Merger amount, in common units			105,000,000
Maximum contribution equity interest merger			1,450,000,000
Merger related expenses	48,000,000
Net gain due to curtailment of postretirement employee benefit plans	$ 11,000,000
Intangible asset, estimated useful life		17 years 6 months
Ownership of Parent						60.00%	40.00%