v2.4.0.6

Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2011
Cash Flow Information | Amounts included in continuing operations for the years ended December 31 were:
|  | Millions of Dollars |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Noncash Investing and Financing Activities |  |  |  |  |  |  |  |  |  |  |  |
Increase in PP&E related to an increase in asset retirement obligations |  | $ | 182 |  |  |  | 808 |  |  |  | 974 |
Cash Payments |  |  |  |  |  |  |  |  |  |  |  |
Interest |  | $ | 919 |  |  |  | 1,120 |  |  |  | 1,052 |
Income taxes |  |  | 10,285 |  |  |  | 8,262 |  |  |  | 6,377 |
Net Sales (Purchases) of Short-Term Investments |  |  |  |  |  |  |  |  |  |  |  |
Short-term investments purchased |  | $ | (6,744 | ) |  |  | (982 | ) |  |  | — |
Short-term investments sold |  |  | 7,144 |  |  |  | — |  |  |  | — |
|  | $ | 400 |  |  |  | (982 | ) |  |  | — |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration