2.2.0.25falsefalse1150 - Disclosure - Investmentstruefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) / shares USD ($) $FROM_Jan01_2010_TO_Dec31_2010http://www.sec.gov/CIK0000773910duration2010-01-01T00:00:002010-12-31T00:00:00usdPerShrDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0MMboeStandardhttp://www.anadarko.com/20101231MMboeapc0USDUSD$5false0apc_EquityMethodAndCostMethodInvestmentsDisclosureTextBlockapcfalsenadurationEquity Method And Cost Method Investments Disclosure Text Blockfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse008.  Investments Noncontrolling Mandatorily Redeemable Interests   In 2007, Anadarko contributed certain of its oil and gas properties and gathering and processing assets, with an aggregate fair value of $2.9 billion at the time of the contribution, to newly formed unconsolidated entities in exchange for noncontrolling mandatorily redeemable London Interbank Offered Rate (LIBOR) based preferred interests in those entities. The common equity of the investee entities is 95% owned by third parties that also maintain control over the assets. Subsequent to their formation, the investee entities loaned Anadarko an aggregate of $2.9 billion. The Company accounts for its investment in these entities using the equity method of accounting. At December 31, 2010, the carrying amount of these investments was $2.8 billion, while the carrying amount of notes payable to affiliates was $2.9 billion. Anadarko has legal right of setoff and intends to net-settle its obligations under each of the notes payable to the investees with the distributable value of its interest in the corresponding investee. Accordingly, the investments and the obligations are presented net on the Consolidated Balance Sheets with the excess of the notes payable to affiliates over the aggregate investment carrying amounts reported in other long-term liabilities—other for all periods presented.       Interest on the notes issued by Anadarko is variable, based on LIBOR, plus a spread that fluctuates with Anadarko's credit rating. The applicable interest rate was 1.30% and 1.25% at December 31, 2010 and 2009, respectively. The note payable with the entity to which Anadarko contributed certain oil and gas properties contains a maximum 67% debt-to-capital covenant. Anadarko was in compliance with this covenant at December 31, 2010. Other (income) expense, net for 2010, 2009 and 2008, includes interest expense on the notes payable of $39 million, $57 million and $123 million, respectively, and equity earnings from Anadarko's investments in the investee entities of $(37) million, $(42) million and $(89) million, respectively.  Other   During 2010, the Company's cost-method investment in Venezuelan assets was impaired to fair value, estimated using Level 3 inputs, recognizing impairment expense of $61 million ($23 million net of tax). At December 31, 2010 and 2009, the Company's after-tax net investment in these assets was $70 million and $83 million, respectively.8.  Investments Noncontrolling Mandatorily Redeemable Interests   In 2007, Anadarko contributed certain of its oil and gasfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringEquity Method And Cost Method Investments Disclosure Text BlockNo authoritative reference available.falsefalseInvestment11InvestmentsUnKnownUnKnownUnKnownUnKnownfalsetrue