3.8.0.1 html 2090 770 1 false 478 0 false 29 false false R1.htm 100000 - Document - Document and Entity Information Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 100010 - Statement - Consolidated Statements of Financial Position Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/StatementConsolidatedStatementsOfFinancialPosition Consolidated Statements of Financial Position Statements 2 false false R3.htm 100020 - Statement - Consolidated Statements of Comprehensive Income, by Nature Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeByNature Consolidated Statements of Comprehensive Income, by Nature Statements 3 false false R4.htm 100040 - Statement - Consolidated Statements of Changes in Equity Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/StatementConsolidatedStatementsOfChangesInEquity Consolidated Statements of Changes in Equity Statements 4 false false R5.htm 100050 - Statement - Consolidated Statements of Cash Flow, Direct Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/StatementConsolidatedStatementsOfCashFlowDirect Consolidated Statements of Cash Flow, Direct Statements 5 false false R6.htm 100060 - Disclosure - The Group's Activities and Financial Statements Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTheGroupSActivitiesAndFinancialStatements The Group's Activities and Financial Statements Notes 6 false false R7.htm 100070 - Disclosure - Basis of Presentation of the Consolidated Financial Statements Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBasisOfPresentationOfConsolidatedFinancialStatements Basis of Presentation of the Consolidated Financial Statements Notes 7 false false R8.htm 100080 - Disclosure - Accounting Policies Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAccountingPolicies Accounting Policies Notes 8 false false R9.htm 100090 - Disclosure - Sector Regulation and Electricity System Operations Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSectorRegulationAndElectricitySystemOperations Sector Regulation and Electricity System Operations Notes 9 false false R10.htm 100100 - Disclosure - Non-Current Assets and Disposal Groups Held for Sale or Held for Distribution to Owners Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureNonCurrentAssetsAndDisposalGroupsHeldForSaleOrHeldForDistributionToOwners Non-Current Assets and Disposal Groups Held for Sale or Held for Distribution to Owners Notes 10 false false R11.htm 100110 - Disclosure - Cash and Cash Equivalents Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCashAndCashEquivalents Cash and Cash Equivalents Notes 11 false false R12.htm 100120 - Disclosure - Other Financial Assets Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialAssets Other Financial Assets Notes 12 false false R13.htm 100130 - Disclosure - Trade and Other Receivables Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherReceivables Trade and Other Receivables Notes 13 false false R14.htm 100140 - Disclosure - Balances and Transactions With Related Parties Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedParties Balances and Transactions With Related Parties Notes 14 false false R15.htm 100150 - Disclosure - Inventories Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInventories Inventories Notes 15 false false R16.htm 100160 - Disclosure - Current Tax Receivables and Payables Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCurrentTaxReceivablesAndPayables Current Tax Receivables and Payables Notes 16 false false R17.htm 100170 - Disclosure - Investments Accounted for Using the Equity Method Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInvestmentsAccountedForUsingEquityMethod Investments Accounted for Using the Equity Method Notes 17 false false R18.htm 100180 - Disclosure - Intangible Assets Other than Goodwill, Net Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIntangibleAssetsOtherThanGoodwillNet Intangible Assets Other than Goodwill, Net Notes 18 false false R19.htm 100190 - Disclosure - Goodwill Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureGoodwill Goodwill Notes 19 false false R20.htm 100200 - Disclosure - Property, Plant and Equipment, Net Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNet Property, Plant and Equipment, Net Notes 20 false false R21.htm 100210 - Disclosure - Deferred Taxes Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxes Deferred Taxes Notes 21 false false R22.htm 100220 - Disclosure - Other Financial Liabilities Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilities Other Financial Liabilities Notes 22 false false R23.htm 100230 - Disclosure - Risk Management Policy Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRiskManagementPolicy Risk Management Policy Notes 23 false false R24.htm 100240 - Disclosure - Financial Instruments Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstruments Financial Instruments Notes 24 false false R25.htm 100250 - Disclosure - Trade and Other Payables Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherPayables Trade and Other Payables Notes 25 false false R26.htm 100260 - Disclosure - Provisions Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureProvisions Provisions Notes 26 false false R27.htm 100270 - Disclosure - Employee Benefit Obligations Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligations Employee Benefit Obligations Notes 27 false false R28.htm 100280 - Disclosure - Total Equity Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquity Total Equity Notes 28 false false R29.htm 100290 - Disclosure - Revenue and Other Income Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRevenueAndOtherIncome Revenue and Other Income Notes 29 false false R30.htm 100300 - Disclosure - Raw Materials and Consumables Used Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRawMaterialsAndConsumablesUsed Raw Materials and Consumables Used Notes 30 false false R31.htm 100310 - Disclosure - Employee Benefits Expense Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitsExpense Employee Benefits Expense Notes 31 false false R32.htm 100320 - Disclosure - Depreciation, Amortization and Impairment Losses Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDepreciationAmortizationAndImpairmentLosses Depreciation, Amortization and Impairment Losses Notes 32 false false R33.htm 100330 - Disclosure - Other Expenses by Nature Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherExpensesByNature Other Expenses by Nature Notes 33 false false R34.htm 100340 - Disclosure - Other Gains (Losses) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherGainsLosses Other Gains (Losses) Notes 34 false false R35.htm 100350 - Disclosure - Financial Results Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialResults Financial Results Notes 35 false false R36.htm 100360 - Disclosure - Income Taxes Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIncomeTaxes Income Taxes Notes 36 false false R37.htm 100370 - Disclosure - Supplemental Disaggregated Financial Information Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSupplementalDisaggregatedFinancialInformation Supplemental Disaggregated Financial Information Notes 37 false false R38.htm 100380 - Disclosure - Third Party Guarantees, Other Contingent Assets and Liabilities, and Other Commitments Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureThirdPartyGuaranteesOtherContingentAssetsAndLiabilitiesAndOtherCommitments Third Party Guarantees, Other Contingent Assets and Liabilities, and Other Commitments Notes 38 false false R39.htm 100390 - Disclosure - Personnel Figures Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePersonnelFigures Personnel Figures Notes 39 false false R40.htm 100400 - Disclosure - Sanctions Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSanctions Sanctions Notes 40 false false R41.htm 100410 - Disclosure - Environment Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEnvironment Environment Notes 41 false false R42.htm 100420 - Disclosure - Financial Information on Subsidiaries, Summarized Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInformationOnSubsidiariesSummarized Financial Information on Subsidiaries, Summarized Notes 42 false false R43.htm 100430 - Disclosure - Subsequent Events Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSubsequentEvents Subsequent Events Notes 43 false false R44.htm 100440 - Disclosure - Appendix 1 Group Companies Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix1GroupCompanies Appendix 1 Group Companies Notes 44 false false R45.htm 100450 - Disclosure - Appendix 2 Changes in the Scope of Consolidation Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix2ChangesInScopeOfConsolidation Appendix 2 Changes in the Scope of Consolidation Notes 45 false false R46.htm 100460 - Disclosure - Appendix 3 Associates and Joint Ventures Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix3AssociatesAndJointVentures Appendix 3 Associates and Joint Ventures Notes 46 false false R47.htm 100470 - Disclosure - Appendix 4 Additional Information on Financial Debt Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix4AdditionalInformationOnFinancialDebt Appendix 4 Additional Information on Financial Debt Notes 47 false false R48.htm 100480 - Disclosure - Appendix 5 Detail of Assets and Liabilities in Foreign Currency Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix5DetailOfAssetsAndLiabilitiesInForeignCurrency Appendix 5 Detail of Assets and Liabilities in Foreign Currency Notes 48 false false R49.htm 100490 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012 Appendix 6 Additional Information Circular No. 715 of February 3, 2012 Notes 49 false false R50.htm 100500 - Disclosure - Appendix 7 Details of Due Dates of Payments to Suppliers Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix7DetailsOfDueDatesOfPaymentsToSuppliers Appendix 7 Details of Due Dates of Payments to Suppliers Notes 50 false false R51.htm 100510 - Disclosure - Accounting Policies (Policies) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAccountingPoliciesPolicies Accounting Policies (Policies) Policies http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAccountingPolicies 51 false false R52.htm 100520 - Disclosure - Accounting Policies (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAccountingPoliciesTables Accounting Policies (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAccountingPolicies 52 false false R53.htm 100530 - Disclosure - Non-Current Assets and Disposal Groups Held for Sale or Held for Distribution to Owners (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureNonCurrentAssetsAndDisposalGroupsHeldForSaleOrHeldForDistributionToOwnersTables Non-Current Assets and Disposal Groups Held for Sale or Held for Distribution to Owners (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureNonCurrentAssetsAndDisposalGroupsHeldForSaleOrHeldForDistributionToOwners 53 false false R54.htm 100540 - Disclosure - Cash and Cash Equivalents (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCashAndCashEquivalentsTables Cash and Cash Equivalents (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCashAndCashEquivalents 54 false false R55.htm 100550 - Disclosure - Other Financial Assets (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialAssetsTables Other Financial Assets (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialAssets 55 false false R56.htm 100560 - Disclosure - Trade and Other Receivables (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherReceivablesTables Trade and Other Receivables (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherReceivables 56 false false R57.htm 100570 - Disclosure - Balances and Transactions With Related Parties (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesTables Balances and Transactions With Related Parties (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedParties 57 false false R58.htm 100580 - Disclosure - Inventories (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInventoriesTables Inventories (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInventories 58 false false R59.htm 100590 - Disclosure - Current Tax Receivables and Payables (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCurrentTaxReceivablesAndPayablesTables Current Tax Receivables and Payables (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCurrentTaxReceivablesAndPayables 59 false false R60.htm 100600 - Disclosure - Investments Accounted for Using the Equity Method (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInvestmentsAccountedForUsingEquityMethodTables Investments Accounted for Using the Equity Method (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInvestmentsAccountedForUsingEquityMethod 60 false false R61.htm 100610 - Disclosure - Intangible Assets Other than Goodwill, Net (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIntangibleAssetsOtherThanGoodwillNetTables Intangible Assets Other than Goodwill, Net (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIntangibleAssetsOtherThanGoodwillNet 61 false false R62.htm 100620 - Disclosure - Goodwill (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureGoodwillTables Goodwill (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureGoodwill 62 false false R63.htm 100630 - Disclosure - Property, Plant and Equipment, Net (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetTables Property, Plant and Equipment, Net (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNet 63 false false R64.htm 100640 - Disclosure - Deferred Taxes (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxesTables Deferred Taxes (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxes 64 false false R65.htm 100650 - Disclosure - Other Financial Liabilities (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesTables Other Financial Liabilities (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilities 65 false false R66.htm 100660 - Disclosure - Risk Management Policy (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRiskManagementPolicyTables Risk Management Policy (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRiskManagementPolicy 66 false false R67.htm 100670 - Disclosure - Financial Instruments (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstrumentsTables Financial Instruments (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstruments 67 false false R68.htm 100680 - Disclosure - Trade and Other Payables (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherPayablesTables Trade and Other Payables (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherPayables 68 false false R69.htm 100690 - Disclosure - Provisions (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureProvisionsTables Provisions (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureProvisions 69 false false R70.htm 100700 - Disclosure - Employee Benefit Obligations (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsTables Employee Benefit Obligations (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligations 70 false false R71.htm 100710 - Disclosure - Total Equity (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquityTables Total Equity (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquity 71 false false R72.htm 100720 - Disclosure - Revenue and Other Income (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRevenueAndOtherIncomeTables Revenue and Other Income (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRevenueAndOtherIncome 72 false false R73.htm 100730 - Disclosure - Raw Materials and Consumables Used (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRawMaterialsAndConsumablesUsedTables Raw Materials and Consumables Used (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRawMaterialsAndConsumablesUsed 73 false false R74.htm 100740 - Disclosure - Employee Benefits Expense (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitsExpenseTables Employee Benefits Expense (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitsExpense 74 false false R75.htm 100750 - Disclosure - Depreciation, Amortization and Impairment Losses (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDepreciationAmortizationAndImpairmentLossesTables Depreciation, Amortization and Impairment Losses (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDepreciationAmortizationAndImpairmentLosses 75 false false R76.htm 100760 - Disclosure - Other Expenses by Nature (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherExpensesByNatureTables Other Expenses by Nature (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherExpensesByNature 76 false false R77.htm 100770 - Disclosure - Other Gains, Net (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherGainsNetTables Other Gains, Net (Tables) Tables 77 false false R78.htm 100780 - Disclosure - Financial Results (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialResultsTables Financial Results (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialResults 78 false false R79.htm 100790 - Disclosure - Income Taxes (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIncomeTaxesTables Income Taxes (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIncomeTaxes 79 false false R80.htm 100800 - Disclosure - Supplemental Disaggregated Financial Information (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSupplementalDisaggregatedFinancialInformationTables Supplemental Disaggregated Financial Information (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSupplementalDisaggregatedFinancialInformation 80 false false R81.htm 100810 - Disclosure - Personnel Figures (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePersonnelFiguresTables Personnel Figures (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePersonnelFigures 81 false false R82.htm 100820 - Disclosure - Environment (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEnvironmentTables Environment (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEnvironment 82 false false R83.htm 100830 - Disclosure - Financial Information on Subsidiaries, Summarized (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInformationOnSubsidiariesSummarizedTables Financial Information on Subsidiaries, Summarized (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInformationOnSubsidiariesSummarized 83 false false R84.htm 100840 - Disclosure - Appendix 1 Group Companies (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix1GroupCompaniesTables Appendix 1 Group Companies (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix1GroupCompanies 84 false false R85.htm 100850 - Disclosure - Appendix 2 Changes in the Scope of Consolidation (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix2ChangesInScopeOfConsolidationTables Appendix 2 Changes in the Scope of Consolidation (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix2ChangesInScopeOfConsolidation 85 false false R86.htm 100860 - Disclosure - Appendix 3 Associates and Joint Ventures (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix3AssociatesAndJointVenturesTables Appendix 3 Associates and Joint Ventures (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix3AssociatesAndJointVentures 86 false false R87.htm 100870 - Disclosure - Appendix 4 Additional Information on Financial Debt (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix4AdditionalInformationOnFinancialDebtTables Appendix 4 Additional Information on Financial Debt (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix4AdditionalInformationOnFinancialDebt 87 false false R88.htm 100880 - Disclosure - Appendix 5 Detail of Assets and Liabilities in Foreign Currency (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix5DetailOfAssetsAndLiabilitiesInForeignCurrencyTables Appendix 5 Detail of Assets and Liabilities in Foreign Currency (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix5DetailOfAssetsAndLiabilitiesInForeignCurrency 88 false false R89.htm 100890 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012Tables Appendix 6 Additional Information Circular No. 715 of February 3, 2012 (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012 89 false false R90.htm 100900 - Disclosure - Appendix 7 Details of Due Dates of Payments to Suppliers (Tables) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix7DetailsOfDueDatesOfPaymentsToSuppliersTables Appendix 7 Details of Due Dates of Payments to Suppliers (Tables) Tables http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix7DetailsOfDueDatesOfPaymentsToSuppliers 90 false false R91.htm 100910 - Disclosure - The Group's Activities and Financial Statements - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTheGroupSActivitiesAndFinancialStatementsAdditionalInformationDetail The Group's Activities and Financial Statements - Additional Information (Detail) Details 91 false false R92.htm 100920 - Disclosure - Basis of Presentation of the Consolidated Financial Statements (New Accounting Pronouncements) - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBasisOfPresentationOfConsolidatedFinancialStatementsNewAccountingPronouncementsAdditionalInformationDetail Basis of Presentation of the Consolidated Financial Statements (New Accounting Pronouncements) - Additional Information (Detail) Details http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBasisOfPresentationOfConsolidatedFinancialStatements 92 false false R93.htm 100930 - Disclosure - Basis of Presentation of the Consolidated Financial Statements - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBasisOfPresentationOfConsolidatedFinancialStatementsAdditionalInformationDetail Basis of Presentation of the Consolidated Financial Statements - Additional Information (Detail) Details 93 false false R94.htm 100940 - Disclosure - Accounting Policies - Summary of Estimated Useful Lives of Property, Plant and Equipment (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyPlantAndEquipmentDetail Accounting Policies - Summary of Estimated Useful Lives of Property, Plant and Equipment (Detail) Details 94 false false R95.htm 100950 - Disclosure - Accounting Policies - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAccountingPoliciesAdditionalInformationDetail Accounting Policies - Additional Information (Detail) Details 95 false false R96.htm 100960 - Disclosure - Sector Regulation and Electricity System Operations - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSectorRegulationAndElectricitySystemOperationsAdditionalInformationDetail Sector Regulation and Electricity System Operations - Additional Information (Detail) Details 96 false false R97.htm 100970 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureNonCurrentAssetsOrGroupsOfAssetsForDisposalClassifiedAsHeldForSaleOrHeldForDistributionToOwnersAdditionalInformationDetail Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Additional Information (Detail) Details 97 false false R98.htm 100980 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Investment Classified as Non-current Assets Held For Distribution (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureNonCurrentAssetsOrGroupsOfAssetsForDisposalClassifiedAsHeldForSaleOrHeldForDistributionToOwnersSummaryOfInvestmentClassifiedAsNonCurrentAssetsHeldForDistributionDetail Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Investment Classified as Non-current Assets Held For Distribution (Detail) Details 98 false false R99.htm 100990 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Additional Financial Information About Hidroaysen (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureNonCurrentAssetsOrGroupsOfAssetsForDisposalClassifiedAsHeldForSaleOrHeldForDistributionToOwnersSummaryOfAdditionalFinancialInformationAboutHidroaysenDetail Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Additional Financial Information About Hidroaysen (Detail) Details 99 false false R100.htm 101000 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners- Summary of Assets and Liabilities Classified as Held for Distribution to Owners (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureNonCurrentAssetsOrGroupsOfAssetsForDisposalClassifiedAsHeldForSaleOrHeldForDistributionToOwnersSummaryOfAssetsAndLiabilitiesClassifiedAsHeldForDistributionToOwnersDetail Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners- Summary of Assets and Liabilities Classified as Held for Distribution to Owners (Detail) Details 100 false false R101.htm 101010 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Schedule of Breakdown by Nature of Income from Discontinued Operations Net of Taxes (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureNonCurrentAssetsOrGroupsOfAssetsForDisposalClassifiedAsHeldForSaleOrHeldForDistributionToOwnersScheduleOfBreakdownByNatureOfIncomeFromDiscontinuedOperationsNetOfTaxesDetail Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Schedule of Breakdown by Nature of Income from Discontinued Operations Net of Taxes (Detail) Details 101 false false R102.htm 101030 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Accumulated Other Comprehensive Loss Amounts in Equity Reserves (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureNonCurrentAssetsOrGroupsOfAssetsForDisposalClassifiedAsHeldForSaleOrHeldForDistributionToOwnersSummaryOfAccumulatedOtherComprehensiveLossAmountsInEquityReservesDetail Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Accumulated Other Comprehensive Loss Amounts in Equity Reserves (Detail) Details 102 false false R103.htm 101040 - Disclosure - Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Net Cash Flows from Operating Investing and Financing Activities (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureNonCurrentAssetsOrGroupsOfAssetsForDisposalClassifiedAsHeldForSaleOrHeldForDistributionToOwnersSummaryOfNetCashFlowsFromOperatingInvestingAndFinancingActivitiesDetail Non-Current Assets or Groups of Assets for Disposal Classified as Held for Sale or Held for Distribution to Owners - Summary of Net Cash Flows from Operating Investing and Financing Activities (Detail) Details 103 false false R104.htm 101050 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCashAndCashEquivalentsSummaryOfCashAndCashEquivalentsDetail Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) Details 104 false false R105.htm 101060 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents by Currency (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCashAndCashEquivalentsSummaryOfCashAndCashEquivalentsByCurrencyDetail Cash and Cash Equivalents - Summary of Cash and Cash Equivalents by Currency (Detail) Details 105 false false R106.htm 101070 - Disclosure - Cash and Cash Equivalents - Summary of Proceeds Received from Sale of Ownership Interest in Associate (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCashAndCashEquivalentsSummaryOfProceedsReceivedFromSaleOfOwnershipInterestInAssociateDetail Cash and Cash Equivalents - Summary of Proceeds Received from Sale of Ownership Interest in Associate (Detail) Details 106 false false R107.htm 101080 - Disclosure - Cash and Cash Equivalents - Summary of Reconciliation of Liabilities Arising From Financing Activities (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCashAndCashEquivalentsSummaryOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesDetail Cash and Cash Equivalents - Summary of Reconciliation of Liabilities Arising From Financing Activities (Detail) Details 107 false false R108.htm 101090 - Disclosure - Other Financial Assets - Summary of Other Financial Assets (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialAssetsSummaryOfOtherFinancialAssetsDetail Other Financial Assets - Summary of Other Financial Assets (Detail) Details 108 false false R109.htm 101100 - Disclosure - Trade and Other Receivables - Summary of Trade and Other Receivables (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherReceivablesSummaryOfTradeAndOtherReceivablesDetail Trade and Other Receivables - Summary of Trade and Other Receivables (Detail) Details 109 false false R110.htm 101110 - Disclosure - Trade and Other Receivables - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherReceivablesAdditionalInformationDetail Trade and Other Receivables - Additional Information (Detail) Details 110 false false R111.htm 101120 - Disclosure - Trade and Other Receivables - Schedule of Unimpaired Past Due Trade Receivables (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherReceivablesScheduleOfUnimpairedPastDueTradeReceivablesDetail Trade and Other Receivables - Schedule of Unimpaired Past Due Trade Receivables (Detail) Details 111 false false R112.htm 101130 - Disclosure - Trade and Other Receivables - Summary of Reconciliation of Changes in the Allowance for Impairment of Trade Receivables (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherReceivablesSummaryOfReconciliationOfChangesInAllowanceForImpairmentOfTradeReceivablesDetail Trade and Other Receivables - Summary of Reconciliation of Changes in the Allowance for Impairment of Trade Receivables (Detail) Details 112 false false R113.htm 101140 - Disclosure - Balances and Transactions with Related Parties - Summary of Receivables from and Accounts Payable to Related Parties (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesSummaryOfReceivablesFromAndAccountsPayableToRelatedPartiesDetail Balances and Transactions with Related Parties - Summary of Receivables from and Accounts Payable to Related Parties (Detail) Details 113 false false R114.htm 101150 - Disclosure - Balances and Transactions with Related Parties - Summary of Significant Transactions and Effect on Income or Expenses (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesSummaryOfSignificantTransactionsAndEffectOnIncomeOrExpensesDetail Balances and Transactions with Related Parties - Summary of Significant Transactions and Effect on Income or Expenses (Detail) Details 114 false false R115.htm 101160 - Disclosure - Balances and Transactions with Related Parties - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesAdditionalInformationDetail Balances and Transactions with Related Parties - Additional Information (Detail) Details 115 false false R116.htm 101170 - Disclosure - Balances and Transactions with Related Parties - Summary of Compensation Paid to Members of the Board of Directors (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesSummaryOfCompensationPaidToMembersOfBoardOfDirectorsDetail Balances and Transactions with Related Parties - Summary of Compensation Paid to Members of the Board of Directors (Detail) Details 116 false false R117.htm 101180 - Disclosure - Balances and Transactions with Related Parties - Summary of Key Management Personnel (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesSummaryOfKeyManagementPersonnelDetail Balances and Transactions with Related Parties - Summary of Key Management Personnel (Detail) Details 117 false false R118.htm 101190 - Disclosure - Balances and Transactions with Related Parties - Summary of Compensation Received by Key Management Personnel (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesSummaryOfCompensationReceivedByKeyManagementPersonnelDetail Balances and Transactions with Related Parties - Summary of Compensation Received by Key Management Personnel (Detail) Details 118 false false R119.htm 101200 - Disclosure - Inventories - Summary of Classes of Inventories (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInventoriesSummaryOfClassesOfInventoriesDetail Inventories - Summary of Classes of Inventories (Detail) Details 119 false false R120.htm 101210 - Disclosure - Inventories - Summary of Classes of Inventories (Parenthetical) (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInventoriesSummaryOfClassesOfInventoriesParentheticalDetail Inventories - Summary of Classes of Inventories (Parenthetical) (Detail) Details 120 false false R121.htm 101220 - Disclosure - Inventories - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInventoriesAdditionalInformationDetail Inventories - Additional Information (Detail) Details 121 false false R122.htm 101230 - Disclosure - Current Tax Receivable and Payables - Summary of Current Tax Receivable and Payable (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureCurrentTaxReceivableAndPayablesSummaryOfCurrentTaxReceivableAndPayableDetail Current Tax Receivable and Payables - Summary of Current Tax Receivable and Payable (Detail) Details 122 false false R123.htm 101240 - Disclosure - Investments Accounted for Using the Equity Method - Schedule of Changes in Investments Accounted for with Equity Method (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInvestmentsAccountedForUsingEquityMethodScheduleOfChangesInInvestmentsAccountedForWithEquityMethodDetail Investments Accounted for Using the Equity Method - Schedule of Changes in Investments Accounted for with Equity Method (Detail) Details 123 false false R124.htm 101250 - Disclosure - Investments Accounted For Using the Equity Method - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInvestmentsAccountedForUsingEquityMethodAdditionalInformationDetail Investments Accounted For Using the Equity Method - Additional Information (Detail) Details 124 false false R125.htm 101260 - Disclosure - Investments Accounted For Using the Equity Method - Summary of Financial Information from Financial Statements of Investments in Associates (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInvestmentsAccountedForUsingEquityMethodSummaryOfFinancialInformationFromFinancialStatementsOfInvestmentsInAssociatesDetail Investments Accounted For Using the Equity Method - Summary of Financial Information from Financial Statements of Investments in Associates (Detail) Details 125 false false R126.htm 101270 - Disclosure - Investments Accounted For Using the Equity Method - Summary of Financial Information from Financial Statements of Main Joint Ventures (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureInvestmentsAccountedForUsingEquityMethodSummaryOfFinancialInformationFromFinancialStatementsOfMainJointVenturesDetail Investments Accounted For Using the Equity Method - Summary of Financial Information from Financial Statements of Main Joint Ventures (Detail) Details 126 false false R127.htm 101280 - Disclosure - Intangible Assets Other Than Goodwill - Summary of Intangible Assets (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIntangibleAssetsOtherThanGoodwillSummaryOfIntangibleAssetsDetail Intangible Assets Other Than Goodwill - Summary of Intangible Assets (Detail) Details 127 false false R128.htm 101290 - Disclosure - Intangible Assets Other Than Goodwill - Summary of Reconciliations of the Carrying Amounts of Intangible Assets (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIntangibleAssetsOtherThanGoodwillSummaryOfReconciliationsOfCarryingAmountsOfIntangibleAssetsDetail Intangible Assets Other Than Goodwill - Summary of Reconciliations of the Carrying Amounts of Intangible Assets (Detail) Details 128 false false R129.htm 101300 - Disclosure - Goodwill - Summary of Goodwill by the Cash-Generating Unit or Group of Cash-Generating Units (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureGoodwillSummaryOfGoodwillByCashGeneratingUnitOrGroupOfCashGeneratingUnitsDetail Goodwill - Summary of Goodwill by the Cash-Generating Unit or Group of Cash-Generating Units (Detail) Details 129 false false R130.htm 101310 - Disclosure - Goodwill - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureGoodwillAdditionalInformationDetail Goodwill - Additional Information (Detail) Details 130 false false R131.htm 101320 - Disclosure - Property, Plant and Equipment, Net - Summary of Property Plant and Equipment (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetSummaryOfPropertyPlantAndEquipmentDetail Property, Plant and Equipment, Net - Summary of Property Plant and Equipment (Detail) Details 131 false false R132.htm 101330 - Disclosure - Property, Plant and Equipment, Net - Summary of Changes in Property Plant and Equipment, Net (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetSummaryOfChangesInPropertyPlantAndEquipmentNetDetail Property, Plant and Equipment, Net - Summary of Changes in Property Plant and Equipment, Net (Detail) Details 132 false false R133.htm 101340 - Disclosure - Property, Plant and Equipment, Net - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetAdditionalInformationDetail Property, Plant and Equipment, Net - Additional Information (Detail) Details 133 false false R134.htm 101350 - Disclosure - Property, Plant and Equipment, Net - Schedule of Future Lease Payments Finance Leases (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetScheduleOfFutureLeasePaymentsFinanceLeasesDetail Property, Plant and Equipment, Net - Schedule of Future Lease Payments Finance Leases (Detail) Details 134 false false R135.htm 101360 - Disclosure - Property, Plant and Equipment, Net - Schedule of Total Future Lease Payments (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetScheduleOfTotalFutureLeasePaymentsDetail Property, Plant and Equipment, Net - Schedule of Total Future Lease Payments (Detail) Details 135 false false R136.htm 101370 - Disclosure - Deferred Taxes - Summary of Deferred Income Tax Assets and Liabilities (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxesSummaryOfDeferredIncomeTaxAssetsAndLiabilitiesDetail Deferred Taxes - Summary of Deferred Income Tax Assets and Liabilities (Detail) Details 136 false false R137.htm 101380 - Disclosure - Deferred Taxes - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxesAdditionalInformationDetail Deferred Taxes - Additional Information (Detail) Details 137 false false R138.htm 101390 - Disclosure - Deferred Taxes - Effects of Deferred Tax on Components of Other Comprehensive Income (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxesEffectsOfDeferredTaxOnComponentsOfOtherComprehensiveIncomeDetail Deferred Taxes - Effects of Deferred Tax on Components of Other Comprehensive Income (Detail) Details 138 false false R139.htm 101400 - Disclosure - Deferred Taxes - Summary of Reconciliation of Deferred Tax Movements Between Balance Sheet and Comprehensive Income (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDeferredTaxesSummaryOfReconciliationOfDeferredTaxMovementsBetweenBalanceSheetAndComprehensiveIncomeDetail Deferred Taxes - Summary of Reconciliation of Deferred Tax Movements Between Balance Sheet and Comprehensive Income (Detail) Details 139 false false R140.htm 101410 - Disclosure - Other Financial Liabilities - Schedule of Balances of Other Financial Liabilities (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesScheduleOfBalancesOfOtherFinancialLiabilitiesDetail Other Financial Liabilities - Schedule of Balances of Other Financial Liabilities (Detail) Details 140 false false R141.htm 101420 - Disclosure - Other Financial Liabilities - Schedule of Interest-bearing Borrowings (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesScheduleOfInterestBearingBorrowingsDetail Other Financial Liabilities - Schedule of Interest-bearing Borrowings (Detail) Details 141 false false R142.htm 101430 - Disclosure - Other Financial Liabilities - Summary of Bank Loans by Currency Maturity (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfBankLoansByCurrencyMaturityDetail Other Financial Liabilities - Summary of Bank Loans by Currency Maturity (Detail) Details 142 false false R143.htm 101440 - Disclosure - Other Financial Liabilities - Summary of Identification of Bank Borrowings by Company (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfIdentificationOfBankBorrowingsByCompanyDetail Other Financial Liabilities - Summary of Identification of Bank Borrowings by Company (Detail) Details 143 false false R144.htm 101450 - Disclosure - Other Financial Liabilities - Summary of Unsecured Liabilities by Currency and Maturity (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfUnsecuredLiabilitiesByCurrencyAndMaturityDetail Other Financial Liabilities - Summary of Unsecured Liabilities by Currency and Maturity (Detail) Details 144 false false R145.htm 101460 - Disclosure - Other Financial Liabilities - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesAdditionalInformationDetail Other Financial Liabilities - Additional Information (Detail) Details 145 false false R146.htm 101470 - Disclosure - Other Financial Liabilities - Summary of Secured and Unsecured Liabilities by Company (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfSecuredAndUnsecuredLiabilitiesByCompanyDetail Other Financial Liabilities - Summary of Secured and Unsecured Liabilities by Company (Detail) Details 146 false false R147.htm 101480 - Disclosure - Other Financial Liabilities - Summary of Detail of Finance Lease Obligations (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfDetailOfFinanceLeaseObligationsDetail Other Financial Liabilities - Summary of Detail of Finance Lease Obligations (Detail) Details 147 false false R148.htm 101490 - Disclosure - Other Financial Liabilities - Summary of Changes in Reserve for Cash Flow Hedges (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfChangesInReserveForCashFlowHedgesDetail Other Financial Liabilities - Summary of Changes in Reserve for Cash Flow Hedges (Detail) Details 148 false false R149.htm 101500 - Disclosure - Risk Management Policy - Schedule of Financial Debt Structure Detailed by Interest Rates Net of Hedging Derivative Instruments (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRiskManagementPolicyScheduleOfFinancialDebtStructureDetailedByInterestRatesNetOfHedgingDerivativeInstrumentsDetail Risk Management Policy - Schedule of Financial Debt Structure Detailed by Interest Rates Net of Hedging Derivative Instruments (Detail) Details 149 false false R150.htm 101510 - Disclosure - Risk Management Policy - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRiskManagementPolicyAdditionalInformationDetail Risk Management Policy - Additional Information (Detail) Details 150 false false R151.htm 101520 - Disclosure - Financial Instruments - Summary of Financial Assets Classified by Type and Category (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFinancialAssetsClassifiedByTypeAndCategoryDetail Financial Instruments - Summary of Financial Assets Classified by Type and Category (Detail) Details 151 false false R152.htm 101530 - Disclosure - Financial Instruments - Summary of Financial Liabilities Classified by Type and Category (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFinancialLiabilitiesClassifiedByTypeAndCategoryDetail Financial Instruments - Summary of Financial Liabilities Classified by Type and Category (Detail) Details 152 false false R153.htm 101540 - Disclosure - Financial Instruments - Summary of Financial Derivative Transactions Qualifying as Hedge Instruments Resulted in Recognition of Assets and Liabilities (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFinancialDerivativeTransactionsQualifyingAsHedgeInstrumentsResultedInRecognitionOfAssetsAndLiabilitiesDetail Financial Instruments - Summary of Financial Derivative Transactions Qualifying as Hedge Instruments Resulted in Recognition of Assets and Liabilities (Detail) Details 153 false false R154.htm 101550 - Disclosure - Financial Instruments - Summary of Hedge Derivative Instruments and Their Corresponding Hedged Instruments (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfHedgeDerivativeInstrumentsAndTheirCorrespondingHedgedInstrumentsDetail Financial Instruments - Summary of Hedge Derivative Instruments and Their Corresponding Hedged Instruments (Detail) Details 154 false false R155.htm 101560 - Disclosure - Financial Instruments - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstrumentsAdditionalInformationDetail Financial Instruments - Additional Information (Detail) Details 155 false false R156.htm 101570 - Disclosure - Financial Instruments - Summary of Financial Derivative Transactions Recorded at Fair Value Through Profit or Loss Resulted in the Recognition of Assets and Liabilities (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFinancialDerivativeTransactionsRecordedAtFairValueThroughProfitOrLossResultedInRecognitionOfAssetsAndLiabilitiesDetail Financial Instruments - Summary of Financial Derivative Transactions Recorded at Fair Value Through Profit or Loss Resulted in the Recognition of Assets and Liabilities (Detail) Details 156 false false R157.htm 101580 - Disclosure - Financial Instruments - Summary of Fair Value of Hedging and Non-hedging Derivatives Entered Into by the Group as Well as the Remaining Contractual Maturities (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFairValueOfHedgingAndNonHedgingDerivativesEnteredIntoByGroupAsWellAsRemainingContractualMaturitiesDetail Financial Instruments - Summary of Fair Value of Hedging and Non-hedging Derivatives Entered Into by the Group as Well as the Remaining Contractual Maturities (Detail) Details 157 false false R158.htm 101590 - Disclosure - Financial instruments- Schedule of Financial Assets and Liabilities Measured at Fair Value (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInstrumentsScheduleOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueDetail Financial instruments- Schedule of Financial Assets and Liabilities Measured at Fair Value (Detail) Details 158 false false R159.htm 101600 - Disclosure - Trade and Other Payables - Summary of Breakdown of Trade and Other Payables (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherPayablesSummaryOfBreakdownOfTradeAndOtherPayablesDetail Trade and Other Payables - Summary of Breakdown of Trade and Other Payables (Detail) Details 159 false false R160.htm 101610 - Disclosure - Trade and Other Payables - Summary of Trade and Other Payables (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTradeAndOtherPayablesSummaryOfTradeAndOtherPayablesDetail Trade and Other Payables - Summary of Trade and Other Payables (Detail) Details 160 false false R161.htm 101620 - Disclosure - Provisions - Summary of Breakdown of Provisions (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureProvisionsSummaryOfBreakdownOfProvisionsDetail Provisions - Summary of Breakdown of Provisions (Detail) Details 161 false false R162.htm 101630 - Disclosure - Provisions - Summary of Changes in Provisions (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureProvisionsSummaryOfChangesInProvisionsDetail Provisions - Summary of Changes in Provisions (Detail) Details 162 false false R163.htm 101640 - Disclosure - Employee Benefit Obligations - Summary of Post Employment Obligations Associated with Defined Benefits Plan (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsSummaryOfPostEmploymentObligationsAssociatedWithDefinedBenefitsPlanDetail Employee Benefit Obligations - Summary of Post Employment Obligations Associated with Defined Benefits Plan (Detail) Details 163 false false R164.htm 101650 - Disclosure - Employee Benefit Obligations - Summary of Changes in Post-employment Defined Benefit Obligations (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsSummaryOfChangesInPostEmploymentDefinedBenefitObligationsDetail Employee Benefit Obligations - Summary of Changes in Post-employment Defined Benefit Obligations (Detail) Details 164 false false R165.htm 101660 - Disclosure - Employee Benefit Obligations - Summary of Changes in Post-employment Defined Benefit Obligations (Parenthetical) (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsSummaryOfChangesInPostEmploymentDefinedBenefitObligationsParentheticalDetail Employee Benefit Obligations - Summary of Changes in Post-employment Defined Benefit Obligations (Parenthetical) (Detail) Details 165 false false R166.htm 101670 - Disclosure - Employee Benefit Obligations - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsAdditionalInformationDetail Employee Benefit Obligations - Additional Information (Detail) Details 166 false false R167.htm 101680 - Disclosure - Employee Benefit Obligations - Summary of Defined Benefit Plans Expense Recognized in Statements of Comprehensive Income (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsSummaryOfDefinedBenefitPlansExpenseRecognizedInStatementsOfComprehensiveIncomeDetail Employee Benefit Obligations - Summary of Defined Benefit Plans Expense Recognized in Statements of Comprehensive Income (Detail) Details 167 false false R168.htm 101690 - Disclosure - Employee Benefit Obligations - Summary of Assumptions Used in Actuarial Calculation of Defined Benefits (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsSummaryOfAssumptionsUsedInActuarialCalculationOfDefinedBenefitsDetail Employee Benefit Obligations - Summary of Assumptions Used in Actuarial Calculation of Defined Benefits (Detail) Details 168 false false R169.htm 101700 - Disclosure - Employee Benefit Obligations - Summary of Expected Flow for Benefits for Next Five Years (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitObligationsSummaryOfExpectedFlowForBenefitsForNextFiveYearsDetail Employee Benefit Obligations - Summary of Expected Flow for Benefits for Next Five Years (Detail) Details 169 false false R170.htm 101710 - Disclosure - Total Equity - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquityAdditionalInformationDetail Total Equity - Additional Information (Detail) Details 170 false false R171.htm 101720 - Disclosure - Total Equity - Schedule of Dividends Paid (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquityScheduleOfDividendsPaidDetail Total Equity - Schedule of Dividends Paid (Detail) Details 171 false false R172.htm 101730 - Disclosure - Total Equity - Summary of Foreign Currency Translation Adjustments (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquitySummaryOfForeignCurrencyTranslationAdjustmentsDetail Total Equity - Summary of Foreign Currency Translation Adjustments (Detail) Details 172 false false R173.htm 101740 - Disclosure - Total Equity - Summary of Other Reserves Within Equity (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquitySummaryOfOtherReservesWithinEquityDetail Total Equity - Summary of Other Reserves Within Equity (Detail) Details 173 false false R174.htm 101750 - Disclosure - Total Equity - Summary of Other Miscellaneous Reserves and Their Effects (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquitySummaryOfOtherMiscellaneousReservesAndTheirEffectsDetail Total Equity - Summary of Other Miscellaneous Reserves and Their Effects (Detail) Details 174 false false R175.htm 101760 - Disclosure - Total Equity - Summary of Non-controlling Interests (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureTotalEquitySummaryOfNonControllingInterestsDetail Total Equity - Summary of Non-controlling Interests (Detail) Details 175 false false R176.htm 101770 - Disclosure - Revenue and Other Income - Summary of Revenues and Other Income (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRevenueAndOtherIncomeSummaryOfRevenuesAndOtherIncomeDetail Revenue and Other Income - Summary of Revenues and Other Income (Detail) Details 176 false false R177.htm 101780 - Disclosure - Raw Materials and Consumables Used - Schedule of Raw Materials and Consumables Used (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureRawMaterialsAndConsumablesUsedScheduleOfRawMaterialsAndConsumablesUsedDetail Raw Materials and Consumables Used - Schedule of Raw Materials and Consumables Used (Detail) Details 177 false false R178.htm 101790 - Disclosure - Employee Benefits Expense - Summary of Employee Expenses (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEmployeeBenefitsExpenseSummaryOfEmployeeExpensesDetail Employee Benefits Expense - Summary of Employee Expenses (Detail) Details 178 false false R179.htm 101800 - Disclosure - Depreciation, Amortization and Impairment Losses - Summary of Depreciation, Amortization and Impairment losses (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDepreciationAmortizationAndImpairmentLossesSummaryOfDepreciationAmortizationAndImpairmentLossesDetail Depreciation, Amortization and Impairment Losses - Summary of Depreciation, Amortization and Impairment losses (Detail) Details 179 false false R180.htm 101810 - Disclosure - Depreciation, Amortization and Impairment Losses - Summary of Depreciation, Amortization and Impairment losses (Parenthetical) (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureDepreciationAmortizationAndImpairmentLossesSummaryOfDepreciationAmortizationAndImpairmentLossesParentheticalDetail Depreciation, Amortization and Impairment Losses - Summary of Depreciation, Amortization and Impairment losses (Parenthetical) (Detail) Details 180 false false R181.htm 101820 - Disclosure - Other Expenses - Summary of Other Operating Expenses (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherExpensesSummaryOfOtherOperatingExpensesDetail Other Expenses - Summary of Other Operating Expenses (Detail) Details 181 false false R182.htm 101830 - Disclosure - Other Expenses - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherExpensesAdditionalInformationDetail Other Expenses - Additional Information (Detail) Details 182 false false R183.htm 101840 - Disclosure - Other Gains, Net - Summary of Other Gains, Net (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureOtherGainsNetSummaryOfOtherGainsNetDetail Other Gains, Net - Summary of Other Gains, Net (Detail) Details 183 false false R184.htm 101850 - Disclosure - Financial Results - Summary of Financial Income and Costs (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialResultsSummaryOfFinancialIncomeAndCostsDetail Financial Results - Summary of Financial Income and Costs (Detail) Details 184 false false R185.htm 101860 - Disclosure - Financial Results - Summary of Effects on Exchange Differences and Application of Indexed Assets and Liabilities (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialResultsSummaryOfEffectsOnExchangeDifferencesAndApplicationOfIndexedAssetsAndLiabilitiesDetail Financial Results - Summary of Effects on Exchange Differences and Application of Indexed Assets and Liabilities (Detail) Details 185 false false R186.htm 101870 - Disclosure - Income Taxes - Components of Income Tax Expense/(Benefit) (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetail Income Taxes - Components of Income Tax Expense/(Benefit) (Detail) Details 186 false false R187.htm 101880 - Disclosure - Income Taxes - Reconciliation of Computed Income Tax Expense (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfComputedIncomeTaxExpenseDetail Income Taxes - Reconciliation of Computed Income Tax Expense (Detail) Details 187 false false R188.htm 101890 - Disclosure - Supplemental Disaggregated Financial Information - Summary of Supplemental Disaggregated Financial Information on Geographic Basis (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSupplementalDisaggregatedFinancialInformationSummaryOfSupplementalDisaggregatedFinancialInformationOnGeographicBasisDetail Supplemental Disaggregated Financial Information - Summary of Supplemental Disaggregated Financial Information on Geographic Basis (Detail) Details 188 false false R189.htm 101900 - Disclosure - Third Party Guarantees, Other Contingent Assets and Liabilities, and Other Commitments - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureThirdPartyGuaranteesOtherContingentAssetsAndLiabilitiesAndOtherCommitmentsAdditionalInformationDetail Third Party Guarantees, Other Contingent Assets and Liabilities, and Other Commitments - Additional Information (Detail) Details 189 false false R190.htm 101910 - Disclosure - Personnel Figures - Summary of Number of Employees (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosurePersonnelFiguresSummaryOfNumberOfEmployeesDetail Personnel Figures - Summary of Number of Employees (Detail) Details 190 false false R191.htm 101920 - Disclosure - Sanctions - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSanctionsAdditionalInformationDetail Sanctions - Additional Information (Detail) Details 191 false false R192.htm 101930 - Disclosure - Environment - Summary of Environmental Expenses (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureEnvironmentSummaryOfEnvironmentalExpensesDetail Environment - Summary of Environmental Expenses (Detail) Details 192 false false R193.htm 101940 - Disclosure - Financial Information on Subsidiaries, Summarized - Summary of Financial Information on Subsidiaries (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureFinancialInformationOnSubsidiariesSummarizedSummaryOfFinancialInformationOnSubsidiariesDetail Financial Information on Subsidiaries, Summarized - Summary of Financial Information on Subsidiaries (Detail) Details 193 false false R194.htm 101950 - Disclosure - Subsequent Events - Additional Information (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail Subsequent Events - Additional Information (Detail) Details 194 false false R195.htm 101960 - Disclosure - Appendix 1 Group Companies - Schedule of Percentage of Control in Each Subsidiary (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix1GroupCompaniesScheduleOfPercentageOfControlInEachSubsidiaryDetail Appendix 1 Group Companies - Schedule of Percentage of Control in Each Subsidiary (Detail) Details 195 false false R196.htm 101970 - Disclosure - Appendix 2 Changes in the Scope of Consolidation - Summary of Companies Eliminated From the Scope of Consolidation (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix2ChangesInScopeOfConsolidationSummaryOfCompaniesEliminatedFromScopeOfConsolidationDetail Appendix 2 Changes in the Scope of Consolidation - Summary of Companies Eliminated From the Scope of Consolidation (Detail) Details 196 false false R197.htm 101980 - Disclosure - Appendix 3 Associates and Joint Ventures - Summary of Investments Accounted for Using the Equity Method (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix3AssociatesAndJointVenturesSummaryOfInvestmentsAccountedForUsingEquityMethodDetail Appendix 3 Associates and Joint Ventures - Summary of Investments Accounted for Using the Equity Method (Detail) Details 197 false false R198.htm 101990 - Disclosure - Appendix 4 Additional Information on Financial Debt - Summary of Bank Borrowings by Currency and Maturity (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix4AdditionalInformationOnFinancialDebtSummaryOfBankBorrowingsByCurrencyAndMaturityDetail Appendix 4 Additional Information on Financial Debt - Summary of Bank Borrowings by Currency and Maturity (Detail) Details 198 false false R199.htm 102000 - Disclosure - Appendix 4 Additional Information on Financial Debt - Summary of Identification of Bank Borrowings by Company (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix4AdditionalInformationOnFinancialDebtSummaryOfIdentificationOfBankBorrowingsByCompanyDetail Appendix 4 Additional Information on Financial Debt - Summary of Identification of Bank Borrowings by Company (Detail) Details 199 false false R200.htm 102010 - Disclosure - Appendix 4 Additional Information on Financial Debt - Summary of Secured and Unsecured Liabilities by Currency and Maturity (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix4AdditionalInformationOnFinancialDebtSummaryOfSecuredAndUnsecuredLiabilitiesByCurrencyAndMaturityDetail Appendix 4 Additional Information on Financial Debt - Summary of Secured and Unsecured Liabilities by Currency and Maturity (Detail) Details 200 false false R201.htm 102020 - Disclosure - Appendix 4 Additional Information on Financial Debt - Secured and Unsecured Liabilities by Company (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix4AdditionalInformationOnFinancialDebtSecuredAndUnsecuredLiabilitiesByCompanyDetail Appendix 4 Additional Information on Financial Debt - Secured and Unsecured Liabilities by Company (Detail) Details 201 false false R202.htm 102030 - Disclosure - Appendix 4 Additional Information on Financial Debt - Summary of Financial Lease Obligation by Company (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix4AdditionalInformationOnFinancialDebtSummaryOfFinancialLeaseObligationByCompanyDetail Appendix 4 Additional Information on Financial Debt - Summary of Financial Lease Obligation by Company (Detail) Details 202 false false R203.htm 102040 - Disclosure - Appendix 5 Detail of Assets and Liabilities in Foreign Currency - Summary of Assets and Liabilities in Foreign Currency (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix5DetailOfAssetsAndLiabilitiesInForeignCurrencySummaryOfAssetsAndLiabilitiesInForeignCurrencyDetail Appendix 5 Detail of Assets and Liabilities in Foreign Currency - Summary of Assets and Liabilities in Foreign Currency (Detail) Details 203 false false R204.htm 102050 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Aging of Trade and Other Receivables (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfAgingOfTradeAndOtherReceivablesDetail Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Aging of Trade and Other Receivables (Detail) Details 204 false false R205.htm 102060 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Trade and Other Receivables by Type of Portfolio (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfTradeAndOtherReceivablesByTypeOfPortfolioDetail Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Trade and Other Receivables by Type of Portfolio (Detail) Details 205 false false R206.htm 102070 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Provisions and Write-offs Portfolio (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfProvisionsAndWriteOffsPortfolioDetail Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Provisions and Write-offs Portfolio (Detail) Details 206 false false R207.htm 102080 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Number and Value of Operations (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfNumberAndValueOfOperationsDetail Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Number and Value of Operations (Detail) Details 207 false false R208.htm 102090 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Trade Receivables by Aging (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfTradeReceivablesByAgingDetail Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Trade Receivables by Aging (Detail) Details 208 false false R209.htm 102100 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Type of Portfolio (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfTypeOfPortfolioDetail Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Type of Portfolio (Detail) Details 209 false false R210.htm 102110 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Estimated Sales and Purchases of Energy and Capacity - Balance Sheet (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfEstimatedSalesAndPurchasesOfEnergyAndCapacityBalanceSheetDetail Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Estimated Sales and Purchases of Energy and Capacity - Balance Sheet (Detail) Details 210 false false R211.htm 102120 - Disclosure - Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Estimated Sales and Purchases of Energy and Capacity - Income Statement (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix6AdditionalInformationCircularNo715OfFebruary32012SummaryOfEstimatedSalesAndPurchasesOfEnergyAndCapacityIncomeStatementDetail Appendix 6 Additional Information Circular No. 715 of February 3, 2012 - Summary of Estimated Sales and Purchases of Energy and Capacity - Income Statement (Detail) Details 211 false false R212.htm 102130 - Disclosure - Appendix 7 Details of Due Dates of Payments to Suppliers - Summary of Details of Due Dates of Payments to Suppliers (Detail) Sheet http://www.enelgeneracion.cl/20171231/taxonomy/role/DisclosureAppendix7DetailsOfDueDatesOfPaymentsToSuppliersSummaryOfDetailsOfDueDatesOfPaymentsToSuppliersDetail Appendix 7 Details of Due Dates of Payments to Suppliers - Summary of Details of Due Dates of Payments to Suppliers (Detail) Details 212 false false All Reports Book All Reports eocc-20171231.xml eocc-20171231.xsd eocc-20171231_cal.xml eocc-20171231_def.xml eocc-20171231_lab.xml eocc-20171231_pre.xml http://fasb.org/us-gaap/2016-01-31 http://xbrl.sec.gov/invest/2013-01-31 http://xbrl.sec.gov/country/2016-01-31 http://xbrl.ifrs.org/taxonomy/2016-03-31/ifrs-full http://xbrl.sec.gov/currency/2016-01-31 http://xbrl.sec.gov/dei/2014-01-31 true true