1.0.0.3 false Capitalized Exploratory Well Costs false 1 $ false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Standard http://www.xbrl.org/2003/instance shares xbrli 0 u002 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 2 Notes To Financial Statements [Abstract] 0 str_NotesToFinancialStatementsAbstract str false na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false No definition available. false 3 Capitalized Exploratory Well Costs 1 us-gaap_SuspendedWellCostsDisclosureTextBlock us-gaap true na duration string No definition available. false false false false false false false false false 1 false false 0 0 Note 5 - Capitalized Exploratory Well Costs Net changes in capitalized exploratory well costs are presented in the table below and exclude amounts that were capitalized and subsequently expensed in the first nine months. All costs have been capitalized for less than one year. 2009 2008 (in millions) Balance at Jan. 1, $ 17.0 $1.5 Additions to capitalized exploratory well costs pending the determination of proved reserves 37.8 Reclassifications to property, plant and equipment after the determination of proved reserves (14.3) Capitalized exploratory well costs charged to expense (2.7) (1.5) Balance at Sept. 30, $ 37.8 $ - Note 5 - Capitalized Exploratory Well Costs Net changes in capitalized exploratory well costs are presented in the table below and exclude amounts that were false false No definition available. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true