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v2.4.1.9

Reconciliation of Segment Information, Revenue and Other Income (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total Revenue and Other Income | $ 3,726,804,000 us-gaap_Revenues | $ 3,299,685,000 us-gaap_Revenues | $ 3,677,526,000 us-gaap_Revenues
Revenue From External Customers | 3,476,100,000 cnx_RevenueFromExternalCustomers | 3,120,722,000 cnx_RevenueFromExternalCustomers | 3,282,350,000 cnx_RevenueFromExternalCustomers
Earnings Before Income Taxes: |  |  |
Earnings Before Income Taxes | 183,124,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic | 46,075,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic | 406,687,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Other Income | 207,103,000 us-gaap_OtherIncome | 111,483,000 us-gaap_OtherIncome | 113,170,000 us-gaap_OtherIncome
Gain (Loss) on Disposition of Assets | 43,601,000 us-gaap_GainLossOnDispositionOfAssets1 | 67,480,000 us-gaap_GainLossOnDispositionOfAssets1 | 282,006,000 us-gaap_GainLossOnDispositionOfAssets1
Total Reportable Business Segments |  |  |
Earnings Before Income Taxes: |  |  |
Earnings Before Income Taxes | 597,161,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = cnx_TotalReportableSegmentsMember | 342,779,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = cnx_TotalReportableSegmentsMember | 648,016,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = cnx_TotalReportableSegmentsMember
Coal Segment [Member] |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total Revenue and Other Income | 2,121,569,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = cnx_CoalSegmentMember | 2,096,869,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = cnx_CoalSegmentMember | 2,327,750,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = cnx_CoalSegmentMember
Earnings Before Income Taxes: |  |  |
Earnings Before Income Taxes | 407,447,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = cnx_CoalSegmentMember | 344,393,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = cnx_CoalSegmentMember | 608,565,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = cnx_CoalSegmentMember
Gas |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total Revenue and Other Income | 1,122,002,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = cnx_GasSegmentMember | 810,602,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = cnx_GasSegmentMember | 713,163,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = cnx_GasSegmentMember
Earnings Before Income Taxes: |  |  |
Earnings Before Income Taxes | 189,714,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = cnx_GasSegmentMember | (1,614,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = cnx_GasSegmentMember | 39,451,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = cnx_GasSegmentMember
Other Segments [Member] |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total Revenue and Other Income | 313,216,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 343,972,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 385,073,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Earnings Before Income Taxes: |  |  |
Earnings Before Income Taxes | (32,821,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (17,201,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 26,194,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Excludes Gas Segment [Member] |  |  |
Earnings Before Income Taxes: |  |  |
Interest Income (Expense), Net and Other Non-operating Activity | (223,564,000)cnx_InterestAndOtherNonoperatingIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = cnx_ExcludesGasSegmentMember | (219,198,000)cnx_InterestAndOtherNonoperatingIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = cnx_ExcludesGasSegmentMember | (220,042,000)cnx_InterestAndOtherNonoperatingIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = cnx_ExcludesGasSegmentMember
Fees for Disposing Non-core Assets | (9,785,000)cnx_FeesForDisposingNonCoreAssets / us-gaap_StatementBusinessSegmentsAxis = cnx_ExcludesGasSegmentMember | (15,168,000)cnx_FeesForDisposingNonCoreAssets / us-gaap_StatementBusinessSegmentsAxis = cnx_ExcludesGasSegmentMember | 6,584,000 cnx_FeesForDisposingNonCoreAssets / us-gaap_StatementBusinessSegmentsAxis = cnx_ExcludesGasSegmentMember
Corporate Adjustments And Eliminations [Member] |  |  |
Earnings Before Income Taxes: |  |  |
Gain (Loss) Estimates on Extinguishment of Debt | (95,267,000)cnx_GainLossEstimatesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = cnx_CorporateAdjustmentsAndEliminationsMember | 0 cnx_GainLossEstimatesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = cnx_CorporateAdjustmentsAndEliminationsMember | 0 cnx_GainLossEstimatesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = cnx_CorporateAdjustmentsAndEliminationsMember
Intersegment Eliminations [Member] |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total Revenue and Other Income | (80,687,000)us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (130,721,000)us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (143,636,000)us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
Earnings Before Income Taxes: |  |  |
Earnings Before Income Taxes | (381,216,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (279,503,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (267,523,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
UNITED STATES |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total Revenue and Other Income | 3,354,581,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US | 2,999,674,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US | 2,898,341,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US
Europe [Member] |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total Revenue and Other Income | 91,340,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember | 83,878,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember | 187,313,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
South America [Member] |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total Revenue and Other Income | 21,685,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember | 29,787,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember | 169,591,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_SouthAmericaMember
CANADA |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total Revenue and Other Income | 8,494,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_CA | 3,575,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_CA | 5,692,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_CA
Other Credit Derivatives [Member] |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total Revenue and Other Income | $ 0 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_OtherCreditDerivativesMember | $ 3,808,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_OtherCreditDerivativesMember | $ 21,413,000 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_OtherCreditDerivativesMember

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