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Derivatives and Risk Management Activities - Financial Impact (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	$ (339)	$ 93	$ (391)	$ 182
Commodity Derivatives | Supply and Logistics segment revenues
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(339)	99	(384)	195
Commodity Derivatives | Field operating costs
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income		(1)	1	(4)
Commodity Derivatives | Depreciation and amortization
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income		(3)		(3)
Interest Rate Derivatives | Interest expense, net
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(2)	(4)	(1)	(6)
Foreign Currency Derivatives | Supply and Logistics segment revenues
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(6)		(12)	2
Preferred Distribution Rate Reset Option | Other income/(expense), net
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	8	2	5	(2)
Derivatives in Hedging Relationships
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(2)	(7)	(1)	(9)
Derivatives in Hedging Relationships | Commodity Derivatives | Depreciation and amortization
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income		(3)		(3)
Derivatives in Hedging Relationships | Interest Rate Derivatives | Interest expense, net
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(2)	(4)	(1)	(6)
Derivatives Not Designated as a Hedge
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(337)	100	(390)	191
Derivatives Not Designated as a Hedge | Commodity Derivatives | Supply and Logistics segment revenues
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(339)	99	(384)	195
Derivatives Not Designated as a Hedge | Commodity Derivatives | Field operating costs
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income		(1)	1	(4)
Derivatives Not Designated as a Hedge | Foreign Currency Derivatives | Supply and Logistics segment revenues
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(6)		(12)	2
Derivatives Not Designated as a Hedge | Preferred Distribution Rate Reset Option | Other income/(expense), net
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	$ 8	$ 2	$ 5	$ (2)

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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+ References

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