Percentage of estimated proved developed reserves classified as proved not producing.

No definition available.

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- Definition

Proved Developed And Undeveloped Reserves Extensions Discoveries And Additions BOE

+ References

No definition available.

+ Details

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- Definition

Proved Developed And Undeveloped Reserves Purchase Of Minerals In Place Boe

+ References

No definition available.

+ Details

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- Definition

The anticipated timing of the inclusion of the costs in the amortization computation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-10.(c)(7)(ii))

-URI http://asc.fasb.org/extlink&oid=27015464&loc=d3e511914-122862

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 10

-Paragraph c

-Subparagraph 3(ii)(A)

-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 12

-Section D

-Subsection 2

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- Definition

Sales of minerals in place.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 5

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447

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Supplemental Oil and Gas Disclosures - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013 MMBoe MBbls	Dec. 31, 2012 MBbls	Dec. 31, 2011 MBbls
Reserve Quantities [Line Items]
Anticipated Timing of Inclusion of Costs in Amortization Calculation	Five to ten years
Purchases of minerals in-place	6
Extensions, discoveries and other additions	389
Sale of minerals in-place	(355,431)	(316)	(53,749)
Percentage of estimated proved developed reserves classified as proved not producing	10.00%
United States [Member]
Reserve Quantities [Line Items]
Extensions, discoveries and other additions	254
Sale of minerals in-place	(223,185)	(246)	(36,481)
Permian and GOM [Member]
Reserve Quantities [Line Items]
Extensions, discoveries and other additions	20
Other Us Regions [Member]
Reserve Quantities [Line Items]
Extensions, discoveries and other additions	19
Canada [Member]
Reserve Quantities [Line Items]
Extensions, discoveries and other additions	74
Sale of minerals in-place	(132,246)	(70)	(17,268)
Egypt [Member]
Reserve Quantities [Line Items]
Extensions, discoveries and other additions	51
Australia Argentina And North Sea [Member]
Reserve Quantities [Line Items]
Extensions, discoveries and other additions	11
Permian Basin [Member]
Reserve Quantities [Line Items]
Extensions, discoveries and other additions	150
Anadarko Basin [Member]
Reserve Quantities [Line Items]
Extensions, discoveries and other additions	65