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Supplemental Cash Flow Information (Reconciliation Of Contributions From (Distributions To) Marathon Oil) (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2011
Distributions to Marathon Oil per consolidated statements of cash flows $ (699)
Non-cash contributions from Marathon Oil 74
Distributions to Marathon Oil per consolidated statements of stockholders' equity / net investment $ (625)