Derivative, Cost Of Hedge, Per Unit

No definition available.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226008-175313

+ Details

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- Definition

The average strike price on the group of price risk option contracts such as put options or call options.

+ References

No definition available.

+ Details

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- Definition

The premium (cost) of a hedge, expensed during the period.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Definition

Average fixed price related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

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- Definition

Amount of unrealized gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of price risk derivatives instruments designated as fair value hedging instruments, as offset by the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective.

+ References

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)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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Derivative Instruments and Hedging Activities (Detail) bbl in Thousands, MMBTU in Thousands, $ in Millions	3 Months Ended			6 Months Ended
	Mar. 31, 2018 MMBTU $ / MMBTU	Dec. 31, 2017 MMBTU $ / MMBTU	Jun. 30, 2017 USD ($) $ / MMBTU $ / bbl	Jun. 30, 2017 USD ($) MMBTU $ / MMBTU $ / bbl bbl
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gain on fair value hedging instruments \| $			$ 41	$ 41
Crude Oil [Member] \| Commodity Option [Member] \| Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, cost of hedge \| $				$ 100
Derivative, cost of hedge (USD per bbl) \| $ / bbl				3.09
Natural Gas [Member] \| Forecast [Member] \| Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, energy measure (MMBtu) \| MMBTU	120	20
Derivative, weighted-average fixed price (USD per MMBtu) \| $ / MMBTU	3.33	3.13
Prepaid Expenses and Other [Member] \| Fair Value, Inputs, Level 2 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value of derivative asset \| $			$ 141	$ 141
2017 [Member] \| Crude Oil [Member] \| NYMEX WTI [Member] \| Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume \| bbl				16,928
Derivative, weighted average strike price (USD per bbl) \| $ / bbl			50.00	50.00
2017 [Member] \| Crude Oil [Member] \| Date Brent [Member] \| Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume \| bbl				15,272
Derivative, weighted average strike price (USD per bbl) \| $ / bbl			51.00	51.00
2017 [Member] \| Natural Gas [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, energy measure (MMBtu) \| MMBTU				4,370
Derivative, weighted-average fixed price (USD per MMBtu) \| $ / MMBTU			3.46	3.46
2018 [Member] \| Natural Gas [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, energy measure (MMBtu) \| MMBTU				2,700
Derivative, weighted-average fixed price (USD per MMBtu) \| $ / MMBTU			3.60	3.60