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Other Financial Information (Noncash Opearting Working Capital Increase (Decrease)) (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016
Other Financial Information [Abstract] |  |  |
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) | [1]
Increase in current income tax liabilities | 38,674 | 40,975 |
Net (increase) decrease in noncash operating working capital | 42,581 | (86,793) |
Cash income taxes paid, net of refunds | 9,448 | (4,367) |
Interest paid, net of amounts capitalized | 72,136 | 52,654 |
Asset retirement costs capitalized | 797 | 8,693 |
Decrease in capital expenditure accrual | $ 43,370 | $ 165,329 |
[1] | 2016 balances included payments for deepwater rig contract exit of $261.8 million.

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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 + Details
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