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Derivatives and Risk Management Activities - Financial Impact (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	$ 151	$ (59)	$ 410	$ (450)
Supply and Logistics segment revenues
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	148	(54)	386	(450)
Field operating costs
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	4	(1)	15
Interest expense, net
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(2)	(2)	(7)	(3)
Other income/(expense), net
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	1	(2)	16	3
Commodity Derivatives
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	153	(60)	395	(443)
Foreign Currency Derivatives
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(1)	5	6	(7)
Preferred Distribution Rate Reset Option
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	1	(2)	16	3
Interest Rate Derivatives
Impact of derivative activities recognized in earnings
Total gain/(loss) on derivatives recognized in net income	(2)	(2)	(7)	(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)	(2)	(7)	(3)
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	149	(59)	380	(443)
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	4	(1)	15
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	(1)	5	6	(7)
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	$ 1	$ (2)	$ 16	$ 3

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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