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Accounting For Suspended Exploratory Well Costs (Change In Capitalized Suspended Exploratory Well Costs) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Accounting For Suspended Exploratory Well Costs [Abstract] | |||
| Capitalized exploratory well costs, beginning balance | $ 2,893 | $ 2,005 | $ 1,585 |
| Additions pending the determination of proved reserves | 310 | 1,103 | 624 |
| Charged to expense | (213) | (104) | (51) |
| Reclassifications to wells, facilities and equipment based on the determination of proved reserves | (149) | (136) | (200) |
| Other | 40 | 25 | 47 |
| Capitalized exploratory well costs, ending balance | 2,881 | 2,893 | 2,005 |
| Ending balance attributed to equity companies included above | $ 9 | ||
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- Definition
Additions to capitalized exploratory well costs that were added during the reporting period pending the determination of proved reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Capitalized exploratory well costs that were expensed during the year because proved reserves were not found at the exploratory well. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Previously capitalized costs of the drilling of wells that were reclassified as part of the costs of the enterprise's wells and related equipment and facilities at the time that proved reserves were found. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Capitalized Exploratory Well Costs Attributable To Equity Companies No definition available.
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- Definition
Other Capitalized Exploratory Well Costs No definition available.
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