v2.4.0.8

Derivative and Financial Instruments - FX Notional (Details 5) In Millions, unless otherwise specified | Jun. 30, 2013 Sell U.S. dollar, buy other currencies [Member] USD ($) | Dec. 31, 2012 Sell U.S. dollar, buy other currencies [Member] USD ($) | Jun. 30, 2013 Buy U.S. dollar, sell other currencies [Member] USD ($) | Dec. 31, 2012 Buy U.S. dollar, sell other currencies [Member] USD ($) | Jun. 30, 2013 Buy British pound, sell other currencies [Member] GBP (£) | Dec. 31, 2012 Buy Euro Sell British Pound [Member] EUR (€)
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Trading Activity, Gains and Losses, Net [Line Items] |  |  |  |  |  |  |  |  |  |
Net notional position of foreign currency exchange derivatives | $ 1,833 | [1] | $ 2,573 | [1] | $ 25 | [2] | $ 140 | [2] | £ 47 | € 96
[1] | *Plans for which ConocoPhillips is not the primary obligor—primarily those administered by equity affiliates.
[2] | **Primarily euro, Canadian dollar and Norwegian krone.

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