Related Party Transactions (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Related party receivables	$ 20		$ 20		$ 8
Purchase of compression equipment	14		25
General and administrative, including related party amounts of $3, $4, $7 and $9	18	25	51	57
Related party payables	43		43		100
ETE
Reimbursement of all direct and indirect expenses	2	4	7	9
Cash distributions received	15	16	31	31
ETE | May Twenty Six Service Agreement
Annual Fees To Affiliates	10
HPC [Member]
General and administrative, including related party amounts of $3, $4, $7 and $9	4	5	10	9
HPC [Member]
Related party receivables	1		1		1
Related party payables	1		1		1
ETE And Its Subsidiaries [Member]
Related party receivables	18		18		5
Related party payables	41		41		99
Ranch JV
Related party receivables	1		1		2
Related party payables	$ 1		$ 1		$ 0