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This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 false2Settlement of liabilities5false 2us-gaap_AssetRetirementObligationRevisionOfEstimateus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00  falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse17976261797626falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of the Increase or Decrease in the amount of the asset retirement obligation during the current period for changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 false2Revision of previous estimates6false 2us-gaap_AssetRetirementObligationAccretionExpenseus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse3672336723falsefalsefalse2truefalsefalse2935329353falsefalsefalse3truefalsefalse7170271702falsefalsefalse4truefalsefalse3424134241falsefalsefalse5truefalsefalse9455694556falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of accretion expense recognized during the period that is associated with an asset retirement obligation. 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