Capitalized Exploratory Well Costs - Additional Information (Detail) $ in Millions	3 Months Ended
Mar. 31, 2017 USD ($) km²
Capitalized Exploratory Well Costs [Line Items]
Capitalized exploratory well costs that have been capitalized for period greater than one year \| $	$ 511
Offshore Ghana
Capitalized Exploratory Well Costs [Line Items]
Capitalized well costs percentage	55.00%
Percentage of ownership interest on license	50.00%
Period to submit plan of development to Ghanaian government	10 months
Stabroek Block, Offshore Guyana
Capitalized Exploratory Well Costs [Line Items]
Capitalized well costs percentage	20.00%
Stabroek Block, offshore Guyana - 3D seismic acquisition area (Kilometers) \| km²	17,000
Participating interest rate on exploration well	30.00%
Northern Portion of Shenzi Field, Gulf of Mexico
Capitalized Exploratory Well Costs [Line Items]
Capitalized well costs percentage	20.00%
Participating interest rate on exploration well	28.00%
JDA, Gulf of Thailand
Capitalized Exploratory Well Costs [Line Items]
Capitalized well costs percentage	5.00%
Participating interest rate on exploration well	50.00%

Represents capitalized well cost greater than one year attributable to project.

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- Definition

Exploration and drilling of well in square kilometers 3D seismic shoot.

+ References

No definition available.

+ Details

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- Definition

Participating interest rate on exploration well.

+ References

No definition available.

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- Definition

Percentage of ownership interest on license.

+ References

No definition available.

+ Details

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- Definition

Period of submitting plan of development .

+ 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.

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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

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=68064819&loc=SL6806780-109447

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