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End date of an aging period of capitalized exploratory well costs which have been capitalized greater than one year, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 1B

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=8451039&loc=SL6806780-109447

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- Definition

Start date of an aging period of capitalized exploratory well costs which have been capitalized greater than one year, in CCYY-MM-DD format.

+ References

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- Definition

The amount of capitalized exploratory well costs that is pending the determination of proved reserves. This does not include amounts that were capitalized and subsequently expensed in the same annual period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 1B

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=8451039&loc=SL6806780-109447

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- Definition

The amount of exploratory well costs that have been capitalized for a period of greater than one year after the completion of drilling.

+ References

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- Definition

The amount of exploratory well costs that have been capitalized for a period of one year or less after the completion of drilling.

+ References

No definition available.

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- Definition

The number of projects for which exploratory well costs have been capitalized for a period of greater than one year after the completion of drilling.

+ References

+ Details

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Suspended Exploratory Well Costs - Aging by Geographic Area and the Year the Costs Were Suspended (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs	$ 1,522us-gaap_CapitalizedExploratoryWellCosts	$ 2,232us-gaap_CapitalizedExploratoryWellCosts	$ 2,062us-gaap_CapitalizedExploratoryWellCosts	$ 1,353us-gaap_CapitalizedExploratoryWellCosts
Suspended exploratory well costs capitalized for a period less than one year after completion of drilling	388
Projects with exploratory well costs capitalized for a period greater than one year after completion of drilling	24
Aging of Capitalized Exploratory Well Costs, Period One [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	368
Aging of Capitalized Exploratory Well Costs, Period Start Date	Jan. 01, 2013
Aging of Capitalized Exploratory Well Costs, Period End Date	Dec. 31, 2013
Aging of Capitalized Exploratory Well Costs, Period Two [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	252
Aging of Capitalized Exploratory Well Costs, Period Start Date	Jan. 01, 2012
Aging of Capitalized Exploratory Well Costs, Period End Date	Dec. 31, 2012
Aging of Capitalized Exploratory Well Costs, Period Three [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	514
Aging of Capitalized Exploratory Well Costs, Period End Date	Dec. 31, 2011
United States Onshore [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs	164
Suspended exploratory well costs capitalized for a period less than one year after completion of drilling	131
United States Onshore [Member] \| Aging of Capitalized Exploratory Well Costs, Period One [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	17
United States Onshore [Member] \| Aging of Capitalized Exploratory Well Costs, Period Two [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	5
United States Onshore [Member] \| Aging of Capitalized Exploratory Well Costs, Period Three [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	11
United States Offshore [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs	314
Suspended exploratory well costs capitalized for a period less than one year after completion of drilling	78
United States Offshore [Member] \| Aging of Capitalized Exploratory Well Costs, Period One [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	80
United States Offshore [Member] \| Aging of Capitalized Exploratory Well Costs, Period Two [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	63
United States Offshore [Member] \| Aging of Capitalized Exploratory Well Costs, Period Three [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	93
International [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs	1,044
Suspended exploratory well costs capitalized for a period less than one year after completion of drilling	179
International [Member] \| Aging of Capitalized Exploratory Well Costs, Period One [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	271
International [Member] \| Aging of Capitalized Exploratory Well Costs, Period Two [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	184
International [Member] \| Aging of Capitalized Exploratory Well Costs, Period Three [Member]
Capitalized Exploratory Well Costs [Line Items]
Suspended exploratory well costs capitalized for a period greater than one year after completion of drilling	$ 410