Drilling Carry Received or Billed.

No definition available.

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- Definition

Minimum number of net wells required to be drilled in the area of mutual interest under terms of agreement.

+ References

No definition available.

+ Details

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- Definition

Number of net wells drilled in the area of mutual interest as of a specified date.

+ References

No definition available.

+ Details

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- Definition

Oil and Gas Property, Cumulative Impairment based on Ceiling Test Calculation.

+ References

No definition available.

+ Details

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- Definition

Total Drilling Carry

+ References

No definition available.

+ Details

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- Details

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- Definition

The excess of unamortized costs capitalized within a cost center, less related deferred income taxes, over the cost center ceiling limitation, which is charged to expense for oil and gas producing companies that use full cost method of accounting for investments in oil and gas producing properties.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 360

-Section S99

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=27015634&loc=d3e516453-122869

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 10

-Paragraph c

-Subparagraph 4(ii)

-Article 4

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- Details

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Property, Plant and Equipment - Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Jun. 30, 2014 well
Property, Plant and Equipment
Cumulative full cost ceiling limitation impairment	$ 4,800,000,000		$ 3,700,000,000
Full cost ceiling limitation impairment	1,100,000,000	164,800,000
Repsol E&P USA, Inc.
Property, Plant and Equipment
Minimum net wells				484
Net wells	427
Repsol E&P USA, Inc.
Property, Plant and Equipment
Drilling carry received or billed		72,300,000
Maximum \| Repsol E&P USA, Inc. \| Potential drilling carry costs
Property, Plant and Equipment
Total drilling carry, maximum				75,000,000.0