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Other Financial Information | 9 Months Ended
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Sep. 30, 2022
Other Financial Information [Abstract] |
Other Financial Information | Note G – Other Financial Information Additional disclosures regarding cash flow activities are provided below.
| Nine Months Ended September 30,
(Thousands of dollars) | 2022 |  | 2021
Net (increase) decrease in operating working capital, excluding cash and cash equivalents: |  |  |
(Increase) decrease in accounts receivable ¹ | $ | (130,792) |  |  | 75,100 |
(Increase) decrease in inventories | (410) |  |  | 9,718 |
(Increase) in prepaid expenses | (8,561) |  |  | (6,682) |
Increase in accounts payable and accrued liabilities ¹ | 61,139 |  |  | 40,687 |
Increase (decrease) in income taxes payable | 18,750 |  |  | (1,493) |
Net (increase) decrease in noncash operating working capital | $ | (59,874) |  |  | 117,330 |
Supplementary disclosures: |  |  |
Cash income taxes paid, net of refunds | $ | 16,493 |  |  | 1,685 |
Interest paid, net of amounts capitalized of $13.2 million in 2022 and $11.6 million in 2021 | 112,332 |  |  | 127,793 |
Non-cash investing activities: |  |  |
Asset retirement costs capitalized 2 | $ | 29,327 |  |  | 36,300 |
Decrease in capital expenditure accrual | 34,853 |  |  | 31,301 |
1 Excludes receivable/payable balances relating to mark-to-market of derivative instruments and contingent consideration relating to acquisitions. 2 2021 Excludes non-cash capitalized cost offset by Terra Nova impairment of $74.4 million and a gain in other operating income of $71.8 million following a commercial agreement to sanction an asset life extension project at Terra Nova in the third quarter of 2021, which extended the life of Terra Nova by approximately 10 years.

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