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Other Financial Information | 9 Months Ended
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Sep. 30, 2023
Other Financial Information [Abstract] |
Other Financial Information | Note F – Other Financial Information Additional disclosures regarding cash flow activities are provided below.
| Nine Months Ended September 30,
(Thousands of dollars) | 2023 |  | 2022
Net (increase) decrease in operating working capital, excluding cash and cash equivalents: |  |  |
(Increase) in accounts receivable | $ | (69,689) |  |  | $ | (130,792) |
(Increase) decrease in inventories | (6,609) |  |  | (410) |
(Increase) in prepaid expenses | (3,364) |  |  | (8,561) |
Increase (decrease) in accounts payable and accrued liabilities ¹ | (60,582) |  |  | 61,139 |
Increase (decrease) in income taxes payable | (2,544) |  |  | 18,750 |
Net increase in noncash working capital | $ | (142,788) |  |  | $ | (59,874) |
Supplementary disclosures: |  |  |
Cash income taxes paid, net of refunds | $ | 12,737 |  |  | $ | 16,493 |
Interest paid, net of amounts capitalized of $10.4 million in 2023 and $13.2 million in 2022 | 78,169 |  |  | 112,332 |
Non-cash investing activities: |  |  |
Asset retirement costs capitalized | $ | 16,219 |  |  | $ | 29,327 |
Decrease in capital expenditure accrual | 75,760 |  |  | 34,853 |
1 Excludes payable balances relating to mark-to-market of derivative instruments and contingent consideration relating to acquisitions.

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- Definition The entire disclosures of supplemental information, including descriptions and amounts, related to the balance sheet, income statement, and/or cash flow statement. + References No definition available. + Details
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