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Other Financial Information | 6 Months Ended
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Jun. 30, 2017
Other Financial Information [Abstract] |
Other Financial Information | Note E – Other Financial Information ﻿ Additional disclosures regarding cash flow activities are provided below. ﻿
﻿ |  |  |  |  |
﻿ | Six Months Ended June 30, |
﻿(Thousands of dollars) | 2017 |  | 2016 |
﻿Net (increase) decrease in operating working capital other than cash and cash equivalents: |  |  |  |  |
﻿Decrease in accounts receivable | $ | 125,283 |  | 109,105 |
﻿Decrease (increase) in inventories |  | 5,918 |  | (4,659) |
﻿Decrease in prepaid expenses |  | 9,206 |  | 99,524 |
﻿Decrease in other |  | – |  | 5,564 |
﻿Decrease in accounts payable and accrued liabilities |  | (136,500) |  | (337,302) | *
﻿Increase in current income tax liabilities |  | 38,674 |  | 40,975 |
﻿Net (increase) decrease in noncash operating working capital | $ | 42,581 |  | (86,793) |
﻿Supplementary disclosures: |  |  |  |  |
﻿Cash income taxes paid, net of refunds | $ | 9,448 |  | (4,367) |
﻿Interest paid, net of amounts capitalized |  | 72,136 |  | 52,654 |
﻿ |  |  |  |  |
﻿Non-cash investing activities: |  |  |  |  |
﻿Asset retirement costs capitalized | $ | 797 |  | 8,693 |
﻿Decrease in capital expenditure accrual |  | 43,370 |  | 165,329 |
﻿ ﻿ * 2016 balances included payments for deepwater rig contract exit of $261.8 million. ﻿

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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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