3.20.1 html 492 457 1 true 132 0 false 12 false false R1.htm 0001000 - Document - Cover Page Sheet http://www.cleco.com/role/CoverPage Cover Page Cover 1 false false R2.htm 1002000 - Statement - Condensed Consolidated Statements of Income (Unaudited) Sheet http://www.cleco.com/role/CondensedConsolidatedStatementsOfIncomeUnaudited Condensed Consolidated Statements of Income (Unaudited) Statements 2 false false R3.htm 1003000 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited) Sheet http://www.cleco.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeUnaudited Condensed Consolidated Statements of Comprehensive Income (Unaudited) Statements 3 false false R4.htm 1003501 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) Sheet http://www.cleco.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeUnauditedParenthetical Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) Statements 4 false false R5.htm 1004000 - Statement - Condensed Consolidated Balance Sheets (Unaudited) Sheet http://www.cleco.com/role/CondensedConsolidatedBalanceSheetsUnaudited Condensed Consolidated Balance Sheets (Unaudited) Statements 5 false false R6.htm 1004501 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) Sheet http://www.cleco.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) Statements 6 false false R7.htm 1005000 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.cleco.com/role/CondensedConsolidatedStatementsOfCashFlowsUnaudited Condensed Consolidated Statements of Cash Flows (Unaudited) Statements 7 false false R8.htm 1005001 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) Sheet http://www.cleco.com/role/CondensedConsolidatedStatementsOfCashFlowsUnauditedParenthetical Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) Statements 8 false false R9.htm 1006000 - Statement - Condensed Consolidated Statements of Changes in Member???s Equity (Unaudited) Sheet http://www.cleco.com/role/CondensedConsolidatedStatementsOfChangesInMembersEquityUnaudited Condensed Consolidated Statements of Changes in Member???s Equity (Unaudited) Statements 9 false false R10.htm 2101100 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.cleco.com/role/SummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 10 false false R11.htm 2102100 - Disclosure - Business Combinations Sheet http://www.cleco.com/role/BusinessCombinations Business Combinations Notes 11 false false R12.htm 2103100 - Disclosure - Recent Authoritative Guidance Sheet http://www.cleco.com/role/RecentAuthoritativeGuidance Recent Authoritative Guidance Notes 12 false false R13.htm 2104100 - Disclosure - Leases Sheet http://www.cleco.com/role/Leases Leases Notes 13 false false R14.htm 2105100 - Disclosure - Revenue Recognition Sheet http://www.cleco.com/role/RevenueRecognition Revenue Recognition Notes 14 false false R15.htm 2106100 - Disclosure - Regulatory Assets and Liabilities Sheet http://www.cleco.com/role/RegulatoryAssetsAndLiabilities Regulatory Assets and Liabilities Notes 15 false false R16.htm 2107100 - Disclosure - Fair Value Accounting Sheet http://www.cleco.com/role/FairValueAccounting Fair Value Accounting Notes 16 false false R17.htm 2108100 - Disclosure - Debt Sheet http://www.cleco.com/role/Debt Debt Notes 17 false false R18.htm 2109100 - Disclosure - Pension Plan and Employee Benefits Sheet http://www.cleco.com/role/PensionPlanAndEmployeeBenefits Pension Plan and Employee Benefits Notes 18 false false R19.htm 2110100 - Disclosure - Income Taxes Sheet http://www.cleco.com/role/IncomeTaxes Income Taxes Notes 19 false false R20.htm 2111100 - Disclosure - Disclosures about Segments Sheet http://www.cleco.com/role/DisclosuresAboutSegments Disclosures about Segments Notes 20 false false R21.htm 2112100 - Disclosure - Regulation and Rates Sheet http://www.cleco.com/role/RegulationAndRates Regulation and Rates Notes 21 false false R22.htm 2113100 - Disclosure - Variable Interest Entities Sheet http://www.cleco.com/role/VariableInterestEntities Variable Interest Entities Notes 22 false false R23.htm 2114100 - Disclosure - Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees Sheet http://www.cleco.com/role/LitigationOtherCommitmentsAndContingenciesAndDisclosuresAboutGuarantees Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees Notes 23 false false R24.htm 2115100 - Disclosure - Affiliate Transactions Sheet http://www.cleco.com/role/AffiliateTransactions Affiliate Transactions Notes 24 false false R25.htm 2116100 - Disclosure - Intangible Assets and Liabilities Sheet http://www.cleco.com/role/IntangibleAssetsAndLiabilities Intangible Assets and Liabilities Notes 25 false false R26.htm 2117100 - Disclosure - Accumulated Other Comprehensive Loss Sheet http://www.cleco.com/role/AccumulatedOtherComprehensiveLoss Accumulated Other Comprehensive Loss Notes 26 false false R27.htm 2201201 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.cleco.com/role/SummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.cleco.com/role/SummaryOfSignificantAccountingPolicies 27 false false R28.htm 2301302 - Disclosure - Summary of Significant Accounting Policies (Tables) Sheet http://www.cleco.com/role/SummaryOfSignificantAccountingPoliciesTables Summary of Significant Accounting Policies (Tables) Tables http://www.cleco.com/role/SummaryOfSignificantAccountingPolicies 28 false false R29.htm 2302301 - Disclosure - Business Combinations (Tables) Sheet http://www.cleco.com/role/BusinessCombinationsTables Business Combinations (Tables) Tables http://www.cleco.com/role/BusinessCombinations 29 false false R30.htm 2304301 - Disclosure - Leases (Tables) Sheet http://www.cleco.com/role/LeasesTables Leases (Tables) Tables http://www.cleco.com/role/Leases 30 false false R31.htm 2305301 - Disclosure - Revenue Recognition (Tables) Sheet http://www.cleco.com/role/RevenueRecognitionTables Revenue Recognition (Tables) Tables http://www.cleco.com/role/RevenueRecognition 31 false false R32.htm 2306301 - Disclosure - Regulatory Assets and Liabilities (Tables) Sheet http://www.cleco.com/role/RegulatoryAssetsAndLiabilitiesTables Regulatory Assets and Liabilities (Tables) Tables http://www.cleco.com/role/RegulatoryAssetsAndLiabilities 32 false false R33.htm 2307301 - Disclosure - Fair Value Accounting (Tables) Sheet http://www.cleco.com/role/FairValueAccountingTables Fair Value Accounting (Tables) Tables http://www.cleco.com/role/FairValueAccounting 33 false false R34.htm 2309301 - Disclosure - Pension Plan and Employee Benefits (Tables) Sheet http://www.cleco.com/role/PensionPlanAndEmployeeBenefitsTables Pension Plan and Employee Benefits (Tables) Tables http://www.cleco.com/role/PensionPlanAndEmployeeBenefits 34 false false R35.htm 2310301 - Disclosure - Income Taxes (Tables) Sheet http://www.cleco.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.cleco.com/role/IncomeTaxes 35 false false R36.htm 2311301 - Disclosure - Disclosures about Segments (Tables) Sheet http://www.cleco.com/role/DisclosuresAboutSegmentsTables Disclosures about Segments (Tables) Tables http://www.cleco.com/role/DisclosuresAboutSegments 36 false false R37.htm 2313301 - Disclosure - Variable Interest Entities (Tables) Sheet http://www.cleco.com/role/VariableInterestEntitiesTables Variable Interest Entities (Tables) Tables http://www.cleco.com/role/VariableInterestEntities 37 false false R38.htm 2315301 - Disclosure - Affiliate Transactions (Tables) Sheet http://www.cleco.com/role/AffiliateTransactionsTables Affiliate Transactions (Tables) Tables http://www.cleco.com/role/AffiliateTransactions 38 false false R39.htm 2316301 - Disclosure - Intangible Assets and Liabilities (Tables) Sheet http://www.cleco.com/role/IntangibleAssetsAndLiabilitiesTables Intangible Assets and Liabilities (Tables) Tables http://www.cleco.com/role/IntangibleAssetsAndLiabilities 39 false false R40.htm 2317301 - Disclosure - Accumulated Other Comprehensive Loss (Tables) Sheet http://www.cleco.com/role/AccumulatedOtherComprehensiveLossTables Accumulated Other Comprehensive Loss (Tables) Tables http://www.cleco.com/role/AccumulatedOtherComprehensiveLoss 40 false false R41.htm 2401403 - Disclosure - Summary of Significant Accounting Policies - Restricted Cash and Cash Equivalents (Details) Sheet http://www.cleco.com/role/SummaryOfSignificantAccountingPoliciesRestrictedCashAndCashEquivalentsDetails Summary of Significant Accounting Policies - Restricted Cash and Cash Equivalents (Details) Details 41 false false R42.htm 2401404 - Disclosure - Summary of Significant Accounting Policies - Changes in Allowance for Credit Losses (Details) Sheet http://www.cleco.com/role/SummaryOfSignificantAccountingPoliciesChangesInAllowanceForCreditLossesDetails Summary of Significant Accounting Policies - Changes in Allowance for Credit Losses (Details) Details 42 false false R43.htm 2402402 - Disclosure - Business Combinations - Narrative (Details) Sheet http://www.cleco.com/role/BusinessCombinationsNarrativeDetails Business Combinations - Narrative (Details) Details 43 false false R44.htm 2402403 - Disclosure - Business Combinations - Assets Acquired and Liabilities Assumed (Details) Sheet http://www.cleco.com/role/BusinessCombinationsAssetsAcquiredAndLiabilitiesAssumedDetails Business Combinations - Assets Acquired and Liabilities Assumed (Details) Details 44 false false R45.htm 2402404 - Disclosure - Business Combinations - Measurement Period Adjustments (Details) Sheet http://www.cleco.com/role/BusinessCombinationsMeasurementPeriodAdjustmentsDetails Business Combinations - Measurement Period Adjustments (Details) Details 45 false false R46.htm 2402405 - Disclosure - Business Combinations - Unaudited Pro Forma Information (Details) Sheet http://www.cleco.com/role/BusinessCombinationsUnauditedProFormaInformationDetails Business Combinations - Unaudited Pro Forma Information (Details) Details 46 false false R47.htm 2403401 - Disclosure - Recent Authoritative Guidance (Details) Sheet http://www.cleco.com/role/RecentAuthoritativeGuidanceDetails Recent Authoritative Guidance (Details) Details http://www.cleco.com/role/RecentAuthoritativeGuidance 47 false false R48.htm 2404402 - Disclosure - Leases - Cottonwood Sale Leaseback Agreement (Details) Sheet http://www.cleco.com/role/LeasesCottonwoodSaleLeasebackAgreementDetails Leases - Cottonwood Sale Leaseback Agreement (Details) Details 48 false false R49.htm 2404403 - Disclosure - Leases - Lease Income Under Cottonwood Sale Leaseback (Details) Sheet http://www.cleco.com/role/LeasesLeaseIncomeUnderCottonwoodSaleLeasebackDetails Leases - Lease Income Under Cottonwood Sale Leaseback (Details) Details 49 false false R50.htm 2405402 - Disclosure - Revenue Recognition - Disaggregation of Revenue (Details) Sheet http://www.cleco.com/role/RevenueRecognitionDisaggregationOfRevenueDetails Revenue Recognition - Disaggregation of Revenue (Details) Details 50 false false R51.htm 2405403 - Disclosure - Revenue Recognition - Narrative (Details) Sheet http://www.cleco.com/role/RevenueRecognitionNarrativeDetails Revenue Recognition - Narrative (Details) Details 51 false false R52.htm 2406402 - Disclosure - Regulatory Assets and Liabilities - Schedule of Regulatory Liabilities (Details) Sheet http://www.cleco.com/role/RegulatoryAssetsAndLiabilitiesScheduleOfRegulatoryLiabilitiesDetails Regulatory Assets and Liabilities - Schedule of Regulatory Liabilities (Details) Details 52 false false R53.htm 2406403 - Disclosure - Regulatory Assets and Liabilities - Schedule of Regulatory Assets (Details) Sheet http://www.cleco.com/role/RegulatoryAssetsAndLiabilitiesScheduleOfRegulatoryAssetsDetails Regulatory Assets and Liabilities - Schedule of Regulatory Assets (Details) Details 53 false false R54.htm 2407402 - Disclosure - Fair Value Accounting - Carrying Value and Estimated Fair Value (Details) Sheet http://www.cleco.com/role/FairValueAccountingCarryingValueAndEstimatedFairValueDetails Fair Value Accounting - Carrying Value and Estimated Fair Value (Details) Details 54 false false R55.htm 2407403 - Disclosure - Fair Value Accounting - Fair Value of Financial Assets and Liabilities Measured On A Recurring Basis (Details) Sheet http://www.cleco.com/role/FairValueAccountingFairValueOfFinancialAssetsAndLiabilitiesMeasuredOnRecurringBasisDetails Fair Value Accounting - Fair Value of Financial Assets and Liabilities Measured On A Recurring Basis (Details) Details 55 false false R56.htm 2407404 - Disclosure - Fair Value Accounting - Net Changes in Net Fair Value of FTR Assets and Liabilities Classified as Level 3 (Details) Sheet http://www.cleco.com/role/FairValueAccountingNetChangesInNetFairValueOfFtrAssetsAndLiabilitiesClassifiedAsLevel3Details Fair Value Accounting - Net Changes in Net Fair Value of FTR Assets and Liabilities Classified as Level 3 (Details) Details 56 false false R57.htm 2407405 - Disclosure - Fair Value Accounting - Significant Unobservable Inputs Used in Developing Fair Value of Level 3 Positions (Details) Sheet http://www.cleco.com/role/FairValueAccountingSignificantUnobservableInputsUsedInDevelopingFairValueOfLevel3PositionsDetails Fair Value Accounting - Significant Unobservable Inputs Used in Developing Fair Value of Level 3 Positions (Details) Details 57 false false R58.htm 2407406 - Disclosure - Fair Value Accounting - Institutional Money Market Funds (Details) Sheet http://www.cleco.com/role/FairValueAccountingInstitutionalMoneyMarketFundsDetails Fair Value Accounting - Institutional Money Market Funds (Details) Details 58 false false R59.htm 2407407 - Disclosure - Fair Value Accounting - Fair Value of Derivative Instruments as Recorded in Condensed Consolidated Balance Sheets (Details) Sheet http://www.cleco.com/role/FairValueAccountingFairValueOfDerivativeInstrumentsAsRecordedInCondensedConsolidatedBalanceSheetsDetails Fair Value Accounting - Fair Value of Derivative Instruments as Recorded in Condensed Consolidated Balance Sheets (Details) Details 59 false false R60.htm 2407408 - Disclosure - Fair Value Accounting - Amount of Gain (Loss) Recognized in Income on Derivatives (Details) Sheet http://www.cleco.com/role/FairValueAccountingAmountOfGainLossRecognizedInIncomeOnDerivativesDetails Fair Value Accounting - Amount of Gain (Loss) Recognized in Income on Derivatives (Details) Details 60 false false R61.htm 2407409 - Disclosure - Fair Value Accounting - Narrative (Details) Sheet http://www.cleco.com/role/FairValueAccountingNarrativeDetails Fair Value Accounting - Narrative (Details) Details 61 false false R62.htm 2408401 - Disclosure - Debt (Details) Sheet http://www.cleco.com/role/DebtDetails Debt (Details) Details http://www.cleco.com/role/Debt 62 false false R63.htm 2409402 - Disclosure - Pension Plan and Employee Benefits - Narrative (Details) Sheet http://www.cleco.com/role/PensionPlanAndEmployeeBenefitsNarrativeDetails Pension Plan and Employee Benefits - Narrative (Details) Details 63 false false R64.htm 2409403 - Disclosure - Pension Plan and Employee Benefits - Net Periodic Pension and Benefits Cost (Details) Sheet http://www.cleco.com/role/PensionPlanAndEmployeeBenefitsNetPeriodicPensionAndBenefitsCostDetails Pension Plan and Employee Benefits - Net Periodic Pension and Benefits Cost (Details) Details 64 false false R65.htm 2409404 - Disclosure - Pension Plan and Employee Benefits - Current and Non-Current Portions of the Other Benefits Liability (Details) Sheet http://www.cleco.com/role/PensionPlanAndEmployeeBenefitsCurrentAndNonCurrentPortionsOfOtherBenefitsLiabilityDetails Pension Plan and Employee Benefits - Current and Non-Current Portions of the Other Benefits Liability (Details) Details 65 false false R66.htm 2409405 - Disclosure - Pension Plan and Employee Benefits - Current and Non-Current Portions of SERP Liability (Details) Sheet http://www.cleco.com/role/PensionPlanAndEmployeeBenefitsCurrentAndNonCurrentPortionsOfSerpLiabilityDetails Pension Plan and Employee Benefits - Current and Non-Current Portions of SERP Liability (Details) Details 66 false false R67.htm 2409406 - Disclosure - Pension Plan and Employee Benefits - 401 (K) Plans (Details) Sheet http://www.cleco.com/role/PensionPlanAndEmployeeBenefits401KPlansDetails Pension Plan and Employee Benefits - 401 (K) Plans (Details) Details http://www.cleco.com/role/PensionPlanAndEmployeeBenefitsTables 67 false false R68.htm 2410402 - Disclosure - Income Taxes - Effective Tax Rate Reconciliation (Details) Sheet http://www.cleco.com/role/IncomeTaxesEffectiveTaxRateReconciliationDetails Income Taxes - Effective Tax Rate Reconciliation (Details) Details 68 false false R69.htm 2410403 - Disclosure - Income Taxes - Narrative (Details) Sheet http://www.cleco.com/role/IncomeTaxesNarrativeDetails Income Taxes - Narrative (Details) Details 69 false false R70.htm 2411402 - Disclosure - Disclosures about Segments (Details) Sheet http://www.cleco.com/role/DisclosuresAboutSegmentsDetails Disclosures about Segments (Details) Details http://www.cleco.com/role/DisclosuresAboutSegmentsTables 70 false false R71.htm 2412401 - Disclosure - Regulation and Rates (Details) Sheet http://www.cleco.com/role/RegulationAndRatesDetails Regulation and Rates (Details) Details http://www.cleco.com/role/RegulationAndRates 71 false false R72.htm 2413402 - Disclosure - Variable Interest Entities - Narrative (Details) Sheet http://www.cleco.com/role/VariableInterestEntitiesNarrativeDetails Variable Interest Entities - Narrative (Details) Details 72 false false R73.htm 2413403 - Disclosure - Variable Interest Entities - Equity Method Investments (Details) Sheet http://www.cleco.com/role/VariableInterestEntitiesEquityMethodInvestmentsDetails Variable Interest Entities - Equity Method Investments (Details) Details 73 false false R74.htm 2413404 - Disclosure - Variable Interest Entities - Carrying Amount of Assets and Liabilities with Maximum Exposure to Loss (Details) Sheet http://www.cleco.com/role/VariableInterestEntitiesCarryingAmountOfAssetsAndLiabilitiesWithMaximumExposureToLossDetails Variable Interest Entities - Carrying Amount of Assets and Liabilities with Maximum Exposure to Loss (Details) Details 74 false false R75.htm 2414401 - Disclosure - Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Litigation (Details) Sheet http://www.cleco.com/role/LitigationOtherCommitmentsAndContingenciesAndDisclosuresAboutGuaranteesLitigationDetails Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Litigation (Details) Details http://www.cleco.com/role/LitigationOtherCommitmentsAndContingenciesAndDisclosuresAboutGuarantees 75 false false R76.htm 2414402 - Disclosure - Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Off-Balance Sheet Commitments and Guarantees (Details) Sheet http://www.cleco.com/role/LitigationOtherCommitmentsAndContingenciesAndDisclosuresAboutGuaranteesOffBalanceSheetCommitmentsAndGuaranteesDetails Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Off-Balance Sheet Commitments and Guarantees (Details) Details 76 false false R77.htm 2415402 - Disclosure - Affiliate Transactions - Narrative (Details) Sheet http://www.cleco.com/role/AffiliateTransactionsNarrativeDetails Affiliate Transactions - Narrative (Details) Details 77 false false R78.htm 2415403 - Disclosure - Affiliate Transactions - Summary of Balances Payable To or Due From Affiliates (Details) Sheet http://www.cleco.com/role/AffiliateTransactionsSummaryOfBalancesPayableToOrDueFromAffiliatesDetails Affiliate Transactions - Summary of Balances Payable To or Due From Affiliates (Details) Details 78 false false R79.htm 2416402 - Disclosure - Intangible Assets and Liabilities - Narrative (Details) Sheet http://www.cleco.com/role/IntangibleAssetsAndLiabilitiesNarrativeDetails Intangible Assets and Liabilities - Narrative (Details) Details 79 false false R80.htm 2416403 - Disclosure - Intangible Assets and Liabilities - Schedule of Amortization of Intangible Assets and Liabilities (Details) Sheet http://www.cleco.com/role/IntangibleAssetsAndLiabilitiesScheduleOfAmortizationOfIntangibleAssetsAndLiabilitiesDetails Intangible Assets and Liabilities - Schedule of Amortization of Intangible Assets and Liabilities (Details) Details 80 false false R81.htm 2416404 - Disclosure - Intangible Assets and Liabilities - Schedule of Finite-Lived Intangible Assets and Liabilities (Details) Sheet http://www.cleco.com/role/IntangibleAssetsAndLiabilitiesScheduleOfFiniteLivedIntangibleAssetsAndLiabilitiesDetails Intangible Assets and Liabilities - Schedule of Finite-Lived Intangible Assets and Liabilities (Details) Details 81 false false R82.htm 2417402 - Disclosure - Accumulated Other Comprehensive Loss (Details) Sheet http://www.cleco.com/role/AccumulatedOtherComprehensiveLossDetails Accumulated Other Comprehensive Loss (Details) Details http://www.cleco.com/role/AccumulatedOtherComprehensiveLossTables 82 false false All Reports Book All Reports cnl-3312020xq1.htm cnl-20200331.xsd cnl-20200331_cal.xml cnl-20200331_def.xml cnl-20200331_lab.xml cnl-20200331_pre.xml cnl-3312020xq1ex101.htm cnl-3312020xq1ex311.htm cnl-3312020xq1ex312.htm cnl-3312020xq1ex313.htm cnl-3312020xq1ex314.htm cnl-3312020xq1ex321.htm cnl-3312020xq1ex322.htm cnl-3312020xq1ex323.htm cnl-3312020xq1ex324.htm http://fasb.org/us-gaap/2019-01-31 http://xbrl.sec.gov/dei/2019-01-31 http://fasb.org/srt/2019-01-31 true true