Area of land sold.

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- Definition

Disposition of businesses.

+ References

No definition available.

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- Definition

Amount of gain (loss) on sale or disposal of proven and unproven oil and gas properties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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- Definition

This element represents the amount of gain (loss) on sale of properties during the reporting period net of the applicable income taxes realized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (SX 210.3-15.(a)(1)(ii))
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- Definition

Amount of noncash consideration received for selling an asset or business through a noncash (or part noncash) transaction.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
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- Definition

Amount after tax of reclassification adjustment from accumulated other comprehensive income for translation gain (loss) realized upon the sale or liquidation of an investment in a foreign entity and foreign currency hedges that are designated and qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation.

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

The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
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Dispositions - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) a
Disposition Of Businesses [Line Items]
Proceeds from asset sales	$ 3,296	$ 140	$ 50
Gains (losses) on asset sales, net	(86)	23	51
Loss included recognition earnings for cumulative translation adjustments	900	0	0
Interest in Algeria
Disposition Of Businesses [Line Items]
Gains (losses) on asset sales, net			(21)
Gain (loss) on asset sale, after-tax			(21)
Miscellaneous Non-core Assets
Disposition Of Businesses [Line Items]
Proceeds from asset sales	194	100
Gains (losses) on asset sales, net	12	23
Gain (loss) on asset sale, after-tax	12	$ 14
Permian Basin
Disposition Of Businesses [Line Items]
Proceeds from asset sales	597
Gains (losses) on asset sales, net	273
Gain (loss) on asset sale, after-tax	280
Permian Basin \| Exploration and Production
Disposition Of Businesses [Line Items]
Gain (loss) on asset sale, after-tax	314
Permian Basin \| Midstream
Disposition Of Businesses [Line Items]
Gain (loss) on asset sale, after-tax	(34)
Equatorial Guinea
Disposition Of Businesses [Line Items]
Proceeds from asset sales	449
Gains (losses) on asset sales, net	486
Gain (loss) on asset sale, after-tax	486
Offshore Norway
Disposition Of Businesses [Line Items]
Proceeds from asset sales	2,056
Gains (losses) on asset sales, net	(857)
Gain (loss) on asset sale, after-tax	$ (857)
Net Acres in Utica Dry Gas Area of Utica Shale
Disposition Of Businesses [Line Items]
Gains (losses) on asset sales, net			49
Gain (loss) on asset sale, after-tax			$ 31
Net acres of Utica dry gas acreage sold \| a			13,000
Sales price of Utica dry gas acreage sold			$ 120
Joint Venture Interest in Bayonne Energy Center
Disposition Of Businesses [Line Items]
Proceeds from asset sales			20
Gains (losses) on asset sales, net			20
Gain (loss) on asset sale, after-tax			$ 13