Derivative Assets And Liabilities Outstanding Interest Rate Derivatives (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2016	Dec. 31, 2015
July 2016 [Member]
Notional Amount	[1],[2]	$ 0	$ 200
Type	[1],[2],[3]	Forward-starting to pay a fixed rate of 3.80% and receive a floating rate
July 2017 [Member]
Notional Amount	[1],[4]	$ 500	300
Type	[1],[3],[4]	Forward-starting to pay a fixed rate of 3.90% and receive a floating rate
July 2018 [Member]
Notional Amount	[4]	$ 200	200
Type	[3],[4]	Forward-starting to pay a fixed rate of 4.00% and receive a floating rate
December 2018 [Member]
Notional Amount		$ 1,200	1,200
Type	[3]	Pay a floating rate based on a 3-month LIBOR and receive a fixed rate of 1.53%
July 2019 [Member]
Notional Amount	[4]	$ 200	200
Type	[3],[4]	Forward-starting to pay a fixed rate of 3.25% and receive a floating rate
March 2019 [Member]
Notional Amount		$ 300	$ 300
Type	[3]	Pay a floating rate based on a 3-month LIBOR and receive a fixed rate of 1.42%

[1] ETP previously had outstanding forward starting interest rate swaps, which were scheduled to expire in July 2016, with a total notional value of $200 million. In June 2016, ETP extended the expiration of those swaps to July 2017.

[2] Represents the effective date. These forward-starting swaps have terms of 10 and 30 years with a mandatory termination date the same as the effective date.

[3] Floating rates are based on 3-month LIBOR.

[4] Represents the effective date. These forward-starting swaps have terms of 30 years with a mandatory termination date the same as the effective date.