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Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. 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Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, 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.","units":{"USD":[{"start":"2016-01-01","end":"2016-12-31","val":400791000,"accn":"0001564590-19-006848","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2016"},{"start":"2017-01-01","end":"2017-06-30","val":36444000,"accn":"0001564590-18-020913","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-09"},{"start":"2017-01-01","end":"2017-09-30","val":2067000,"accn":"0001564590-18-028693","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2017-01-01","end":"2017-12-31","val":-386780000,"accn":"0001564590-19-006848","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2017-01-01","end":"2017-12-31","val":-386780000,"accn":"0001564590-20-016770","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-15","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":1086000,"accn":"0001564590-19-017535","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":-10896000,"accn":"0001564590-18-020913","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-09"},{"start":"2018-01-01","end":"2018-06-30","val":-10896000,"accn":"0001564590-19-031147","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":-3138000,"accn":"0001564590-18-028693","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-09"},{"start":"2018-01-01","end":"2018-09-30","val":-3138000,"accn":"0001564590-19-041557","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2018-01-01","end":"2018-12-31","val":1036000,"accn":"0001564590-19-006848","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08"},{"start":"2018-01-01","end":"2018-12-31","val":1036000,"accn":"0001564590-20-016770","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-15","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":-6240000,"accn":"0001564590-19-017535","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-09"},{"start":"2019-01-01","end":"2019-03-31","val":-6240000,"accn":"0001564590-20-028281","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-06-04","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":-11212000,"accn":"0001564590-19-031147","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":-11212000,"accn":"0001564590-20-038100","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":-12733000,"accn":"0001564590-19-041557","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-07"},{"start":"2019-01-01","end":"2019-12-31","val":-15864000,"accn":"0001564590-20-016770","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-15","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":5056000,"accn":"0001564590-20-028281","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-06-04","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":31062000,"accn":"0001564590-20-038100","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"}]}},"CashProvidedByUsedInDiscontinuedOperationsOperatingActivities":{"label":"Cash Provided by (Used in) Discontinued Operations, Operating Activities (Deprecated 2009-01-31)","description":"Cash provided by or used in the operating activities of the entity's discontinued operations during the period. The reporting entity may disclose the net cash flows from discontinued operations below the net cash flows from financing activities or include cash flows from discontinued operations, by category (operating, investing, or financing), in the body of the cash flow statement. This element is used to disclose cash flows from the operating activities of discontinued operations as a component of net cash flows from discontinued operations, which is reported below net cash flows from financing activities of continuing operations.","units":{"USD":[{"start":"2007-01-01","end":"2007-12-31","val":-1592000,"accn":"0000950123-10-018286","fy":2009,"fp":"FY","form":"10-K","filed":"2010-02-26","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":0,"accn":"0000950123-10-018286","fy":2009,"fp":"FY","form":"10-K","filed":"2010-02-26","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0000950123-10-018286","fy":2009,"fp":"FY","form":"10-K","filed":"2010-02-26","frame":"CY2009"}]}},"CommonStockCapitalSharesReservedForFutureIssuance":{"label":"Common Stock, Capital Shares Reserved for Future Issuance","description":"Aggregate number of common shares reserved for future 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Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or \"\"G&G\"\" costs. Exploration costs also include costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, the maintenance of land and lease records, dry hole contributions and bottom hole contributions, costs of drilling and equipping exploratory wells and costs of drilling exploratory-type stratigraphic test 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Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.","units":{"USD":[{"end":"2010-12-31","val":1561343000,"accn":"0001193125-12-067172","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-17","frame":"CY2010Q4I"},{"end":"2011-12-31","val":2058506000,"accn":"0001193125-12-067172","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-17","frame":"CY2011Q4I"},{"end":"2013-12-31","val":2626349000,"accn":"0001193125-15-059984","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-24","frame":"CY2013Q4I"},{"end":"2014-12-31","val":3190319000,"accn":"0001193125-15-059984","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-24"},{"end":"2014-12-31","val":3190319000,"accn":"0001193125-16-484243","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29","frame":"CY2014Q4I"},{"end":"2015-12-31","val":2220100000,"accn":"0001193125-16-484243","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29"},{"end":"2015-12-31","val":2220100000,"accn":"0001193125-17-051805","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22"},{"end":"2015-12-31","val":2220100000,"accn":"0000950123-17-011024","fy":null,"fp":null,"form":"8-K","filed":"2017-11-16","frame":"CY2015Q4I"},{"end":"2016-12-31","val":3984699000,"accn":"0001193125-17-051805","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22"},{"end":"2016-12-31","val":3984699000,"accn":"0000950123-17-011024","fy":null,"fp":null,"form":"8-K","filed":"2017-11-16","frame":"CY2016Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive":{"label":"Long-Term Debt, Maturity, after Year Five","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2017-12-31","val":1438437000,"accn":"0001564590-18-003771","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-28","frame":"CY2017Q4I"},{"end":"2018-12-31","val":1698687000,"accn":"0001564590-19-006848","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-08","frame":"CY2018Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths":{"label":"Long-Term Debt, Maturity, Year One","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. 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Average Number of Shares, Contingently Issuable","description":"Shares issuable for little or no cash consideration upon the satisfaction of certain conditions (contingently issuable shares) are considered outstanding common shares and included in the computation of basic Earnings Per Share as of the date that all necessary conditions have been satisfied (in essence, when issuance of the shares is no longer contingent). Outstanding common shares that are contingently returnable (that is, subject to recall) are treated in the same manner as contingently issuable shares. Contingently issuable shares include shares that (a) will be issued in the future upon the satisfaction of specified conditions, (b) have been placed in escrow and all or part must be returned if specified conditions are not met, or (c) have been issued but the holder must return all or part if specified conditions are not met. 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