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Impairment - Narrative (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 USD ($) property | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Jun. 30, 2014 USD ($) | Mar. 31, 2014 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Full cost ceiling impairments |  |  |  |  |  |  | $ 164,800,000 | $ 4,500,000,000 | $ 164,800,000 | $ 0
Asset impairment charges | $ 886,800,000 | $ 1,100,000,000 | $ 1,500,000,000 | $ 1,100,000,000 |  |  |  | 4,534,689,000 | 192,768,000 | 26,280,000
Net value of assets held for sale | $ 491,760,000 |  |  |  | $ 576,463,000 |  |  | 491,760,000 | 576,463,000 |
Number of properties held for sale | property | 1 |  |  |  |  |  |  |  |  |
Drilling and Oil Field Services |  |  |  |  |  |  |  |  |  |
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Net value of assets held for sale | $ 16,000,000 |  | $ 20,000,000 |  |  |  |  | 16,000,000 |  |
Drilling and Oilfield Services Assets - Permian Region |  |  |  |  |  |  |  |  |  |
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  |  |  |  | 24,300,000 |
Drilling Assets |  |  |  |  |  |  |  |  |  |
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  | $ 24,300,000 | $ 3,100,000 |  | 37,600,000 | 3,100,000 | 11,100,000
Gas Treating Plants and other Midstream Assets |  |  |  |  |  |  |  |  |  |
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  |  |  | 7,100,000 | $ 600,000 | 12,200,000
Buildings |  |  |  |  |  |  |  |  |  |
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  |  |  | $ 15,400,000 |  |
Corporate Asset |  |  |  |  |  |  |  |  |  |
Schedule of Impaired Long-Lived Assets Held and Used and Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  |  |  |  |  | $ 2,900,000

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
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- Definition The excess of unamortized costs capitalized within a cost center, less related deferred income taxes, over the cost center ceiling limitation, which is charged to expense for oil and gas producing companies that use full cost method of accounting for investments in oil and gas producing properties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section S99 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27015634&loc=d3e516453-122869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 10 -Paragraph c -Subparagraph 4(ii) -Article 4 + Details
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