Related Party Transactions (Narrative) (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||||||
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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Related Party Transaction [Line Items] | ||||||||||||||
Operating revenues and other income | $ 1,883 | [1] | $ 2,107 | [1] | $ 6,119 | [1] | $ 6,515 | [1] | ||||||
Purchases | 4,176 | [2] | 8,938 | [2] | 18,984 | [2] | 25,354 | [2] | ||||||
Operating expenses and selling, general and administrative expenses | 32 | [3] | 97 | [3] | 175 | [3] | 288 | [3] | ||||||
Contribution of PP&E, primarily office buildings and facilities | ||||||||||||||
Noncash capital contribution of PP&E; primarily office buildings and facilities | 374 | |||||||||||||
Noncash capital contribution of employee benefit liabilities; primarily related to US and UK pension plans | 1,230 | |||||||||||||
Noncash capital contribution of deferred taxes associated with the employee benefit liabilities | 340 | |||||||||||||
ConocoPhillips [Member]
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Related Party Transaction [Line Items] | ||||||||||||||
Operating revenues and other income | 305 | 381 | 869 | |||||||||||
Purchases | 4,005 | 5,328 | 11,592 | |||||||||||
Operating expenses and selling, general and administrative expenses | $ 46 | $ 70 | $ 144 | |||||||||||
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