v3.6.0.2

Fair Value Measurements (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Financial Assets: |  |  |
Financial Assets: Natural Gas Options/Collars | [1] | $ 1,000 |
Financial Liabilities: |  |  |
Financial Liabilities: Crude Oil Swaps | [2] | 36,000 |
Financial Liabilities: Natural Gas Swaps | [2] | 4,000 |
Financial Liabilities: Crude Oil Options/Swaptions | [2] | 22,000 |
Proved oil and gas properties, other property, plant and equipment and other assets, carrying amount |  | 778,000 | $ 9,154,000
Proved oil and gas properties, other property, plant and equipment and other assets written down during the period - fair value at end of period |  | 587,000 | 2,828,000
Pretax impairment charges for proved oil and gas properties, other property, plant and equipment and other assets |  | 191,000 | 6,326,000
Pretax impairment charges for obsolete inventory |  | 61,000 |
Pretax impairment charges for firm commitment contracts |  | 138,000 |
Net of Tax Impairment Charges for Proved Oil and Gas Properties, Other Property, Plant and Equipment and Other Assets |  |  | 4,141,000
Aggregate Principal Amount of Current and Long-Term Debt |  | 6,990,000 | 6,390,000
Fair Value of Debt |  | 7,190,000 | $ 6,524,000
Fair Value, Inputs, Level 1 [Member] |  |  |
Financial Assets: |  |  |
Financial Assets: Natural Gas Options/Collars | [1] | 0 |
Financial Liabilities: |  |  |
Financial Liabilities: Crude Oil Swaps | [2] | 0 |
Financial Liabilities: Natural Gas Swaps | [2] | 0 |
Financial Liabilities: Crude Oil Options/Swaptions | [2] | 0 |
Fair Value, Inputs, Level 2 [Member] |  |  |
Financial Assets: |  |  |
Financial Assets: Natural Gas Options/Collars | [1] | 1,000 |
Financial Liabilities: |  |  |
Financial Liabilities: Crude Oil Swaps | [2] | 36,000 |
Financial Liabilities: Natural Gas Swaps | [2] | 4,000 |
Financial Liabilities: Crude Oil Options/Swaptions | [2] | 22,000 |
Fair Value, Inputs, Level 3 [Member] |  |  |
Financial Assets: |  |  |
Financial Assets: Natural Gas Options/Collars | [1] | 0 |
Financial Liabilities: |  |  |
Financial Liabilities: Crude Oil Swaps | [2] | 0 |
Financial Liabilities: Natural Gas Swaps | [2] | 0 |
Financial Liabilities: Crude Oil Options/Swaptions | [2] | $ 0 |
[1] | At December 31, 2016, $1 million is included in "Other Assets" on the Consolidated Balance Sheets.
[2] | At December 31, 2016, $62 million is included in "Current Liabilities - Liabilities from Price Risk Management Activities" on the Consolidated Balance Sheets.

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References No definition available. + Details
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- Definition The expense recorded to reduce the value of property, plant and equipment to estimated fair value when circumstances indicate such property, plant and equipment has been impaired and to reduce the value of oil and gas assets consisting of proved properties as the estimate of future successful production from these properties is reduced. + References No definition available. + Details
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