v2.4.0.8
Related Party Transactions (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Significant transactions with related parties        
Operating revenues and other income $ 31 $ 11 $ 39 $ 34
Purchases 49 [1] 93 [1] 90 [1] 136 [1]
Operating expenses and selling, general and administrative expenses 43 41 89 81
Net interest expense $ 7 [2] $ 10 [2] $ 16 [2] $ 21 [2]
[1]    *2012 has been restated to eliminate certain non-related party transactions.
[2] *Plans for which ConocoPhillips is not the primary obligor—primarily those administered by equity affiliates.