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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a),(c),(d),(e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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The amount of net gain (loss) reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

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- Definition

The loss recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
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Derivatives and Risk Management Activities - Financial Impact (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income	$ (198)	$ (324)	$ 156
Loss on ineffective portion of cash flow hedges	0	4	0
Commodity Derivatives \| Supply and Logistics segment revenues
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income	(188)	(342)	208
Commodity Derivatives \| Transportation segment revenues
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income		5	8
Commodity Derivatives \| Field operating costs
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income	(10)		(18)
Commodity Derivatives \| Depreciation and amortization
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income	(3)
Interest Rate Derivatives \| Interest expense, net
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income	(18)	(14)	(11)
Foreign Currency Derivatives \| Supply and Logistics segment revenues
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income	8	(3)	(31)
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	13	30
Derivatives in Hedging Relationships
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income	(21)	(12)	45
Derivatives in Hedging Relationships \| Supply and Logistics segment revenues
Impact of derivative activities recognized in earnings
Loss recognized due to anticipated hedged transactions being probable of not occurring		2
Derivatives in Hedging Relationships \| Interest expense, net
Impact of derivative activities recognized in earnings
Loss recognized due to anticipated hedged transactions being probable of not occurring	10	2	4
Derivatives in Hedging Relationships \| Commodity Derivatives \| Supply and Logistics segment revenues
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income		2	56
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)
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	(18)	(14)	(11)
Derivatives Not Designated as a Hedge
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income	(177)	(312)	111
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	(188)	(344)	152
Derivatives Not Designated as a Hedge \| Commodity Derivatives \| Transportation segment revenues
Impact of derivative activities recognized in earnings
Total gain (loss) on derivatives recognized in net income		5	8
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	(10)		(18)
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	8	(3)	$ (31)
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	$ 13	$ 30