| Note 22—Cash Flow Information | | | | | | | |
| | | | | | | | |
| Amounts included in continuing operations for the years ended December 31 were: | |
| | | | | | | | |
| | Millions of Dollars | |
| | | 2013 | | 2012 | | 2011 | |
| Noncash Investing and Financing Activities | | | | | | | |
| Increase in PP&E related to an increase in asset retirement obligations* | $ | 1,329 | | 1,010 | | 182 | |
| Increase in PP&E and debt related to a capital lease asset and obligation | | 906 | | - | | - | |
| | | | | | | | |
| Cash Payments | | | | | | | |
| Interest | $ | 566 | | 724 | | 919 | |
| Income taxes** | | 4,910 | | 8,100 | | 9,827 | |
| | | | | | | | |
| Net Sales (Purchases) of Short-Term Investments | | | | | | | |
| Short-term investments purchased | $ | (361) | | (497) | | (6,744) | |
| Short-term investments sold | | 98 | | 1,094 | | 7,144 | |
| | $ | (263) | | 597 | | 400 | |
| *Includes $212 million and $152 million in 2013 and 2012, respectively, primarily related to the impact of U.K. tax law changes on the | |
| deductibility of decommissioning costs. | | | | | | | |
| **2012 and 2011 have been revised to conform to current-year presentation to include only income tax payments related to continuing | |
| operations. | |
