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Suspended Wells - Summary of Aging of Exploratory Well Costs that have been Capitalized for More than One Year (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
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Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | $ 922 | $ 793 | $ 589
Aktote-Kazakhstan [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 19 |  |
Alpine Satellite-Alaska [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 21 |  |
Browse Basin-Australia[Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 216 |  |
Caldita/Barossa-Australia [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 77 |  |
Fiord West-Alaska[Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 16 |  |
Harrison-U.K.[Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 15 |  |
Kairan-Kazakhstan (2) [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 27 |  |
Kairan-Kazakhstan (1) [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 14 |  |
Kashagan-Kazakhstan [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 44 |  |
Malikai - Malaysia [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 52 |  |
NPR-A-Alaska [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 17 |  |
NPR-A-Alaska [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 30 |  |
Point Thomson-Alaska [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 37 |  |
Rak More-Kazakhsta [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 22 |  |
Saleski-Canada [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 14 |  |
Shenandoah-Lower 48 [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 43 |  |
Sunrise 3-Australia[Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 13 |  |
Surmont III and beyond-Canada [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 26 |  |
Su tu Nau-Vietnam [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 18 |  |
Thornbury-Canada [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 19 |  |
Tiber-Lower 48 [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 40 |  |
Titan-Norway [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 11 |  |
Ubah-Malaysia [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 34 |  |
Uge-Nigeria [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 29 |  |
Sixteen projects of $10 million or less each [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 68 |  |
2008-2010 [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 589 |  |
2008-2010 [Member] | Browse Basin-Australia[Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 216 |  |
2008-2010 [Member] | Fiord West-Alaska[Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 16 |  |
2008-2010 [Member] | Kairan-Kazakhstan (1) [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 5 |  |
2008-2010 [Member] | Kashagan-Kazakhstan [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 19 |  |
2008-2010 [Member] | NPR-A-Alaska [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 17 |  |
2008-2010 [Member] | NPR-A-Alaska [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 19 |  |
2008-2010 [Member] | Point Thomson-Alaska [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 37 |  |
2008-2010 [Member] | Rak More-Kazakhsta [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 22 |  |
2008-2010 [Member] | Saleski-Canada [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 14 |  |
2008-2010 [Member] | Shenandoah-Lower 48 [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 43 |  |
2008-2010 [Member] | Sunrise 3-Australia[Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 13 |  |
2008-2010 [Member] | Surmont III and beyond-Canada [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 6 |  |
2008-2010 [Member] | Su tu Nau-Vietnam [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 9 |  |
2008-2010 [Member] | Thornbury-Canada [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 19 |  |
2008-2010 [Member] | Tiber-Lower 48 [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 40 |  |
2008-2010 [Member] | Titan-Norway [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 11 |  |
2008-2010 [Member] | Ubah-Malaysia [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 34 |  |
2008-2010 [Member] | Uge-Nigeria [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 15 |  |
2008-2010 [Member] | Sixteen projects of $10 million or less each [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 34 |  |
2005-2007 [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 250 |  |
2005-2007 [Member] | Caldita/Barossa-Australia [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 77 |  |
2005-2007 [Member] | Harrison-U.K.[Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 15 |  |
2005-2007 [Member] | Kairan-Kazakhstan (2) [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 14 |  |
2005-2007 [Member] | Kairan-Kazakhstan (1) [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 5 |  |
2005-2007 [Member] | Kashagan-Kazakhstan [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 15 |  |
2005-2007 [Member] | Malikai - Malaysia [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 40 |  |
2005-2007 [Member] | NPR-A-Alaska [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 11 |  |
2005-2007 [Member] | Surmont III and beyond-Canada [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 18 |  |
2005-2007 [Member] | Su tu Nau-Vietnam [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 9 |  |
2005-2007 [Member] | Uge-Nigeria [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 14 |  |
2005-2007 [Member] | Sixteen projects of $10 million or less each [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 32 |  |
2001-2004 [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 83 |  |
2001-2004 [Member] | Aktote-Kazakhstan [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 19 |  |
2001-2004 [Member] | Alpine Satellite-Alaska [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 21 |  |
2001-2004 [Member] | Kairan-Kazakhstan (2) [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 13 |  |
2001-2004 [Member] | Kairan-Kazakhstan (1) [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 4 |  |
2001-2004 [Member] | Kashagan-Kazakhstan [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 10 |  |
2001-2004 [Member] | Malikai - Malaysia [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 12 |  |
2001-2004 [Member] | Surmont III and beyond-Canada [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | 2 |  |
2001-2004 [Member] | Sixteen projects of $10 million or less each [Member] |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Aging of Exploratory Well Cost that have been capitalized for more than one year | $ 2 |  |

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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=8451039&loc=SL6806780-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS19-1 -Paragraph 10 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Details
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