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Estimates (Fair Value Of Financial Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Other Assets, Fair Value Disclosure		$ 0
Total liabilities	$ (560)
Level 1 [Member]
Total liabilities	(303)
Level 2 [Member]
Total liabilities	(257)
Fair Value, Measurements, Recurring [Member]
Commodity derivatives:	321	363
Other Assets, Fair Value Disclosure	21	13
Total assets	342	376
Interest rate derivatives	(219)	(193)
Embedded derivatives in the ETP Convertible Preferred Units		(1)
Commodity derivatives:	(341)	(478)
Total liabilities		(672)
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Commodity derivatives:	277	356
Other Assets, Fair Value Disclosure	14	8
Total assets	291	364
Interest rate derivatives	0	0
Embedded derivatives in the ETP Convertible Preferred Units		0
Commodity derivatives:	(303)	(470)
Total liabilities		(470)
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Commodity derivatives:	44	7
Other Assets, Fair Value Disclosure	7	5
Total assets	51	12
Interest rate derivatives	(219)	(193)
Embedded derivatives in the ETP Convertible Preferred Units		0
Commodity derivatives:	(38)	(8)
Total liabilities		(201)
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Commodity derivatives:		0
Total assets		0
Interest rate derivatives		0
Embedded derivatives in the ETP Convertible Preferred Units		(1)
Commodity derivatives:		0
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value		1
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Options - Calls [Member]
Commodity derivatives:		1
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Forward Swaps [Member]
Commodity derivatives:	23	4
Commodity derivatives:	(22)	(5)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Future [Member]
Commodity derivatives:		1
Commodity derivatives:		(1)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Level 1 [Member] | Options - Calls [Member]
Commodity derivatives:		1
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Level 1 [Member] | Forward Swaps [Member]
Commodity derivatives:	0	0
Commodity derivatives:	0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Level 1 [Member] | Future [Member]
Commodity derivatives:		1
Commodity derivatives:		(1)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Level 2 [Member] | Options - Calls [Member]
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Level 2 [Member] | Forward Swaps [Member]
Commodity derivatives:	23	4
Commodity derivatives:	(22)	(5)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Level 2 [Member] | Future [Member]
Commodity derivatives:		0
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Level 3 [Member] | Options - Calls [Member]
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Level 3 [Member] | Forward Swaps [Member]
Commodity derivatives:		0
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Power [Member] | Level 3 [Member] | Future [Member]
Commodity derivatives:		0
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Refined Products [Member] | Forward Swaps [Member]
Commodity derivatives:		2
Commodity derivatives:	(1)	(23)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Refined Products [Member] | Future [Member]
Commodity derivatives:	1
Commodity derivatives:	(28)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Refined Products [Member] | Level 1 [Member] | Forward Swaps [Member]
Commodity derivatives:		2
Commodity derivatives:	(1)	(23)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Refined Products [Member] | Level 1 [Member] | Future [Member]
Commodity derivatives:	1
Commodity derivatives:	(28)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Refined Products [Member] | Level 2 [Member] | Forward Swaps [Member]
Commodity derivatives:		0
Commodity derivatives:	0	0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Refined Products [Member] | Level 2 [Member] | Future [Member]
Commodity derivatives:	0
Commodity derivatives:	0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Refined Products [Member] | Level 3 [Member] | Forward Swaps [Member]
Commodity derivatives:		0
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Crude [Member] | Fixed Swaps/Futures [Member]
Commodity derivatives:		9
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Crude [Member] | Future [Member]
Commodity derivatives:	2
Commodity derivatives:		(13)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Crude [Member] | Level 1 [Member] | Fixed Swaps/Futures [Member]
Commodity derivatives:		9
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Crude [Member] | Level 1 [Member] | Future [Member]
Commodity derivatives:	2
Commodity derivatives:		(13)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Crude [Member] | Level 2 [Member] | Fixed Swaps/Futures [Member]
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Crude [Member] | Level 2 [Member] | Future [Member]
Commodity derivatives:	0
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Crude [Member] | Level 3 [Member] | Fixed Swaps/Futures [Member]
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Crude [Member] | Level 3 [Member] | Future [Member]
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Basis Swaps IFERC NYMEX [Member]
Commodity derivatives:	11	14
Commodity derivatives:	(24)	(11)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Swing Swaps IFERC [Member]
Commodity derivatives:	13	2
Commodity derivatives:	(15)	(3)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Fixed Swaps/Futures [Member]
Commodity derivatives:	70	96
Commodity derivatives:	(57)	(149)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Forward Physical Swaps [Member]
Commodity derivatives:	8	1
Commodity derivatives:	2
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 1 [Member] | Basis Swaps IFERC NYMEX [Member]
Commodity derivatives:	11	14
Commodity derivatives:	(24)	(11)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 1 [Member] | Swing Swaps IFERC [Member]
Commodity derivatives:	0	0
Commodity derivatives:	(1)	0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 1 [Member] | Fixed Swaps/Futures [Member]
Commodity derivatives:	70	96
Commodity derivatives:	(57)	(149)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 1 [Member] | Forward Physical Swaps [Member]
Commodity derivatives:	0	0
Commodity derivatives:	0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 2 [Member] | Basis Swaps IFERC NYMEX [Member]
Commodity derivatives:	0	0
Commodity derivatives:	0	0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 2 [Member] | Swing Swaps IFERC [Member]
Commodity derivatives:	13	2
Commodity derivatives:	(14)	(3)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 2 [Member] | Fixed Swaps/Futures [Member]
Commodity derivatives:	0	0
Commodity derivatives:	0	0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 2 [Member] | Forward Physical Swaps [Member]
Commodity derivatives:	8	1
Commodity derivatives:	2
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 3 [Member] | Basis Swaps IFERC NYMEX [Member]
Commodity derivatives:		0
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 3 [Member] | Swing Swaps IFERC [Member]
Commodity derivatives:		0
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 3 [Member] | Fixed Swaps/Futures [Member]
Commodity derivatives:		0
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - Natural Gas [Member] | Level 3 [Member] | Forward Physical Swaps [Member]
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - NGLs [Member] | Forward Swaps [Member]
Commodity derivatives:	193	233
Commodity derivatives:	(192)	(273)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - NGLs [Member] | Level 1 [Member] | Forward Swaps [Member]
Commodity derivatives:	193	233
Commodity derivatives:	(192)	(273)
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - NGLs [Member] | Level 2 [Member] | Forward Swaps [Member]
Commodity derivatives:	0	0
Commodity derivatives:		0
Fair Value, Measurements, Recurring [Member] | Commodity Derivatives - NGLs [Member] | Level 3 [Member] | Forward Swaps [Member]
Commodity derivatives:		0
Commodity derivatives:		$ 0

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
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Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Fair value as of the balance sheet date of price risk derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets on the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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