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Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015 | Dec. 31, 2014
Variable Interest Entity [Line Items] |  |  |  |
Noncontrolling interests | $ 260 |  | $ 259 |
Net income attributable to noncontrolling interests | 0 | $ 19 |  |
VIE, Cash and cash equivalents | 16 | 2,907 | 825 | $ 4,108
VIE. proved natural gas and oil properties | 64,305 |  | 63,843 |
VIE. accumulated depreciation, depletion and amortization | (60,506) |  | (59,365) |
VIE. other current liabilities | 1,544 |  | 2,219 |
Proceeds from sales ro KKR | 62 | 21 |  |
Loss on sale of investment | (10) | 0 |  |
Mineral Acquisition Company I, L.P. [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |  |  | 10 |
Proceeds from sales ro KKR | 9 |  |  |
Loss on sale of investment | (10) |  |  |
Noncontrolling Interest, Chesapeake Granite Wash Trust [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Noncontrolling interests | 260 | 259 |  |
Net income attributable to noncontrolling interests | 0 | $ 1 |  |
Variable Interest Entities, Primary Beneficiary [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE, Cash and cash equivalents | 1 |  | 1 |
VIE. proved natural gas and oil properties | 488 |  | 488 |
VIE. accumulated depreciation, depletion and amortization | (445) |  | (428) |
VIE. other current liabilities | $ 2 |  | $ 8 |

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- Definition Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Properties -URI http://asc.fasb.org/extlink&oid=21914647 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Glossary Proved Properties -URI http://asc.fasb.org/extlink&oid=6522428 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3044-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + Details
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