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Operating activities include all transactions and events that are not defined as investing or financing activities. Operating activities generally involve producing and delivering goods and providing services. Cash flows from operating activities are generally the cash effects of transactions and other events that enter into the determination of net income.falsefalseOperating activities3false0cnl_NetIncomecnlfalsecreditdurationThe profit or loss of the entity net of income taxes for the reporting period, calculated and presented in the income...falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse255391000255391falsetruefalsefalsefalse2truefalsefalse106307000106307falsetruefalsefalsefalse3truefalsefalse102141000102141falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe profit or loss of the entity net of income taxes for the reporting period, calculated and presented in the income statement in accordance with GAAP.No authoritative reference available.falsefalseNet Income4true0us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseAdjustments to reconcile net income to net cash (used in) provided by operating activities5false0us-gaap_DepreciationDepletionAndAmortizationus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse170399000170399falsefalsefalsefalsefalse2truefalsefalse121436000121436falsefalsefalsefalsefalse3truefalsefalse120652000120652falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.No authoritative reference available.falsefalseDepreciation and amortization6false0us-gaap_DebtInstrumentIncreaseDecreaseOtherNetus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse-129870000-129870falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNet increase or decrease in the carrying amount of the debt instrument for the period for reasons other than accrued but unpaid interest, additional borrowings, forgiveness and repayments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 falsefalseGain on forgiveness of debt7false0us-gaap_ProvisionForDoubtfulAccountsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse15530001553falsefalsefalsefalsefalse2truefalsefalse16820001682falsefalsefalsefalsefalse3truefalsefalse38260003826falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 falsefalseProvision for doubtful accounts8false0us-gaap_EquityMethodInvestmentDividendsOrDistributionsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse00falsefalsefalsefalsefalse2truefalsefalse750000750falsefalsefalsefalsefalse3truefalsefalse51060005106falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 falsefalseReturn on equity investment in investee9false0us-gaap_IncomeLossFromEquityMethodInvestmentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-38849000-38849falsefalsefalsefalsefalse2truefalsefalse1742300017423falsefalsefalsefalsefalse3truefalsefalse55420005542falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b falsefalse(Income) loss from equity investments10false0us-gaap_ShareBasedCompensationus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse55870005587falsefalsefalsefalsefalse2truefalsefalse60870006087falsefalsefalsefalsefalse3truefalsefalse25400002540falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock options, amortization of restricted stock, and adjustment for officers compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseUnearned compensation expense11false0us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquityus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-12413000-12413falsefalsefalsefalsefalse2truefalsefalse-73269000-73269falsefalsefalsefalsefalse3truefalsefalse-64953000-64953falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 15 falsefalseAllowance for other funds used during construction12false0cnl_AmortizationOfInvestmentTaxCreditscnlfalsecreditdurationThe amortization of the amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain...falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-1285000-1285falsefalsefalsefalsefalse2truefalsefalse-1332000-1332falsefalsefalsefalsefalse3truefalsefalse-1380000-1380falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amortization of the amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.No authoritative reference available.falsefalseAmortization of investment tax credits13false0us-gaap_DeferredIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse5487300054873falsefalsefalsefalsefalse2truefalsefalse-5983000-5983falsefalsefalsefalsefalse3truefalsefalse51540005154falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing the net change in the entity's deferred tax assets and liabilities pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseNet deferred income taxes14false0us-gaap_IncreaseDecreaseInDeferredFuelCostsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2108600021086falsefalsefalsefalsefalse2truefalsefalse72230007223falsefalsefalsefalsefalse3truefalsefalse64440006444falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in carrying amount of capitalized fuel costs of a regulated entity that are expected to be recoverable through rate adjustments within one year or the normal operating cycle, if longer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseDeferred fuel costs15false0us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContractsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-405000-405falsefalsefalsefalsefalse2truefalsefalse167000167falsefalsefalsefalsefalse3truefalsefalse22130002213falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate increase (decrease) in the market value of open derivatives, commodity, or energy contracts. These gains (losses) are included in earnings.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseLoss (gain) on economic hedges16false0us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValueus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-2759000-2759falsefalsefalsefalsefalse2truefalsefalse-5180000-5180falsefalsefalsefalsefalse3truefalsefalse53340005334falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Technical Bulletin (FTB) -Number 85-4 -Paragraph 2 falsefalseCash surrender value of company-/trust-owned life insurance17true0us-gaap_IncreaseDecreaseInOperatingCapitalAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseChanges in assets and liabilities18false0us-gaap_IncreaseDecreaseInAccountsReceivableus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-35156000-35156falsefalsefalsefalsefalse2truefalsefalse83100008310falsefalsefalsefalsefalse3truefalsefalse-5557000-5557falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseAccounts receivable19false0cnl_IncreaseDecreaseInAccountsAndNotesReceivableAffiliatecnlfalsecreditdurationThe net change during the reporting period of the aggregate amount of receivables to be collected from related parties where...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse21090002109falsefalsefalsefalsefalse2truefalsefalse-8701000-8701falsefalsefalsefalsefalse3truefalsefalse1424200014242falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period of the aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.No authoritative reference available.falsefalseAccounts and notes receivable, affiliate20false0cnl_IncreaseDecreaseInUnbilledRevenuecnlfalsecreditdurationThe net change during the reporting period in the unbilled amounts due for services rendered or products shipped. This...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-22675000-22675falsefalsefalsefalsefalse2truefalsefalse-2262000-2262falsefalsefalsefalsefalse3truefalsefalse-1954000-1954falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the unbilled amounts due for services rendered or products shipped. This element is distinct from unbilled contracts receivables because this is based on noncontract transactions.No authoritative reference available.falsefalseUnbilled revenue21false0us-gaap_IncreaseDecreaseInInventoriesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-7465000-7465falsefalsefalsefalsefalse2truefalsefalse-26680000-26680falsefalsefalsefalsefalse3truefalsefalse-12282000-12282falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseFuel, materials and supplies inventory22false0us-gaap_IncreaseDecreaseInPrepaidExpenseus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-2316000-2316falsefalsefalsefalsefalse2truefalsefalse15750001575falsefalsefalsefalsefalse3truefalsefalse10500001050falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalsePrepayments23false0us-gaap_IncreaseDecreaseInAccountsPayableus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse34590003459falsefalsefalsefalsefalse2truefalsefalse1123100011231falsefalsefalsefalsefalse3truefalsefalse28060002806falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the aggregate amount of obligations due within one year (or one business cycle). This may include trade payables, amounts due to related parties, royalties payable, and other obligations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseAccounts payable24false0cnl_IncreaseDecreaseInAccountsAndNotesPayableAffiliatecnlfalsecreditdurationThe net change during the reporting period in the carrying amount due to all related parties.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-2215000-2215falsefalsefalsefalsefalse2truefalsefalse-22796000-22796falsefalsefalsefalsefalse3truefalsefalse-34260000-34260falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the carrying amount due to all related parties.No authoritative reference available.falsefalseAccounts and notes payable, affiliate25false0us-gaap_IncreaseDecreaseInCustomerDepositsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1231300012313falsefalsefalsefalsefalse2truefalsefalse1290600012906falsefalsefalsefalsefalse3truefalsefalse59610005961falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the period in the amount of customer money held in customer accounts, including security deposits, collateral for a current or future transactions, initial payment of the cost of acquisition or for the right to enter into a contract or agreement.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseCustomer deposits26false0us-gaap_IncreaseDecreaseInLongTermReceivablesCurrentus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse2797600027976falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the amount due within one year (or one business cycle) of receivables that were originally due beyond one year (or one business cycle).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseLong-term receivable27false0us-gaap_PaymentsForPostemploymentBenefitsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse25530002553falsefalsefalsefalsefalse2truefalsefalse-11555000-11555falsefalsefalsefalsefalse3truefalsefalse48990004899falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCash outflows for payments of postemployment benefits (such as severance pay and health insurance benefits) recognized during the period. Postemployment benefits are benefits paid to employees after employment but before retirement.No authoritative reference available.falsefalsePost retirement benefit obligation28false0us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-88333000-88333falsefalsefalsefalsefalse2truefalsefalse3292200032922falsefalsefalsefalsefalse3truefalsefalse4379000043790falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the value of assets that are created when regulatory agencies permits public utilities to defer costs (revenues) to the balance sheet. This element is a the net change of regulatory assets and liabilities combined.No authoritative reference available.falsefalseRegulatory assets and liabilities, net29false0cnl_IncreaseDecreaseInOtherDeferredAccountscnlfalsecreditdurationThe net change during the reporting period in other deferred assets and obligations, net, not otherwise defined in the...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse44910004491falsefalsefalsefalsefalse2truefalsefalse-46051000-46051falsefalsefalsefalsefalse3truefalsefalse-114855000-114855falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in other deferred assets and obligations, net, not otherwise defined in the taxonomy where the receipts and payments will be made in future periods.No authoritative reference available.falsefalseOther deferred accounts30false0us-gaap_IncreaseDecreaseInRetainagePayableus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse19130001913falsefalsefalsefalsefalse2truefalsefalse-11921000-11921falsefalsefalsefalsefalse3truefalsefalse1270900012709falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in retainage obligations due by the reporting entity that are payable within one year (or one business cycle).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseRetainage payable31false0cnl_IncreaseDecreaseInTaxesAccruedcnlfalsenadurationThe net change during the reporting period of the carrying value of obligations incurred and payable for statutory income,...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-34266000-34266falsefalsefalsefalsefalse2truefalsefalse2361200023612falsefalsefalsefalsefalse3truefalsefalse19840001984falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period of the carrying value of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes.No authoritative reference available.falsefalseTaxes accrued32false0us-gaap_IncreaseDecreaseInInterestPayableNetus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse24660002466falsefalsefalsefalsefalse2truefalsefalse-4138000-4138falsefalsefalsefalsefalse3truefalsefalse-4439000-4439falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseInterest accrued33false0us-gaap_IncreaseDecreaseInRiskManagementAssetsAndLiabilitiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse78850007885falsefalsefalsefalsefalse2truefalsefalse44060004406falsefalsefalsefalsefalse3truefalsefalse-16482000-16482falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the aggregate market value of financial instruments that are purchased and held principally for the purpose of hedging or mitigating market risk, credit risk, legal risk, operational risk, and other types of risk.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseRisk management assets and liabilities, net34false0us-gaap_IncreaseDecreaseInOtherOperatingCapitalNetus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-2642000-2642falsefalsefalsefalsefalse2truefalsefalse-990000-990falsefalsefalsefalsefalse3truefalsefalse-705000-705falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryFor entities with classified balance sheets, the net change during the reporting period in the value of other assets or liabilities used in operating activities, that are not otherwise defined in the taxonomy. For entities with unclassified balance sheets, the net change during the reporting period in the value of all other assets or liabilities used in operating activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseOther operating35false0us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse193405000193405falsefalsefalsefalsefalse2truefalsefalse135179000135179falsefalsefalsefalsefalse3truefalsefalse8952600089526[1]falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash from (used in) the entity's continuing operations. This element specifically EXCLUDES the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in operating activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 -Footnote 10 truefalseNet cash (used in) provided by operating activities36true0us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseInvesting activities37false0us-gaap_PaymentsToAcquirePropertyPlantAndEquipmentus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-283389000-283389falsefalsefalsefalsefalse2truefalsefalse-250286000-250286falsefalsefalsefalsefalse3truefalsefalse-335757000-335757falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph c falsefalseAdditions to property, plant and equipment38false0us-gaap_AllowanceForFundsUsedDuringConstructionInvestingActivitiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1241300012413falsefalsefalsefalsefalse2truefalsefalse7326900073269falsefalsefalsefalsefalse3truefalsefalse6495300064953falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCash inflow due to change during the period in the allowance for other funds used during construction classified as an investing activity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 falsefalseAllowance for other funds used during construction39false0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipmentus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse801000801falsefalsefalsefalsefalse2truefalsefalse751000751falsefalsefalsefalsefalse3truefalsefalse18940001894falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -Subparagraph c falsefalseProceeds from sale of property, plant and equipment40false0us-gaap_CashAcquiredFromAcquisitionus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse812000812falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 16, 17 falsefalseCash from reconsolidation of VIEs41false0cnl_ReturnOfEquityInvestmentInInvesteescnlfalsedebitdurationThe cash inflow associated with dividends paid from an equity method investment in excess of accumulated net income and...falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00falsefalsefalsefalsefalse2truefalsefalse850000850falsefalsefalsefalsefalse3truefalsefalse38520003852falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow associated with dividends paid from an equity method investment in excess of accumulated net income and investments.No authoritative reference available.falsefalseReturn of equity investment in investees42false0us-gaap_PaymentsToAcquireEquityMethodInvestmentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-44571000-44571falsefalsefalsefalsefalse2truefalsefalse-45539000-45539falsefalsefalsefalsefalse3truefalsefalse-18522000-18522falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph b falsefalseEquity investment in investees43false0us-gaap_PaymentsToAcquireLifeInsurancePoliciesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-3554000-3554falsefalsefalsefalsefalse2truefalsefalse-2752000-2752falsefalsefalsefalsefalse3truefalsefalse-1664000-1664falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow for payments to purchase life insurance policies for which the entity is the beneficiary.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 17 falsefalsePremiums paid on company-/trust-owned life insurance44false0us-gaap_ProceedsFromOtherDebtus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse11480001148falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow from other borrowing not otherwise defined in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph b falsefalseAdvances on company-owned life insurance loan45false0us-gaap_RepaymentsOfOtherDebtus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-14355000-14355falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow for the payment of other borrowing not otherwise defined in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b falsefalseRepayment of company-owned life insurance loan46false0us-gaap_IncreaseDecreaseInRestrictedCashus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse4553500045535falsefalsefalsefalsefalse2truefalsefalse4653100046531falsefalsefalsefalsefalse3truefalsefalse-85021000-85021falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash inflow (outflow) for the net change associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 16, 17 falsefalseTransfer of cash from (to) restricted accounts47false0us-gaap_PaymentsForProceedsFromOtherInvestingActivitiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse2300023falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse15400001540falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash outflow (inflow) from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 falsefalseOther investing48false0us-gaap_NetCashProvidedByUsedInInvestingActivitiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse-285137000-285137falsefalsefalsefalsefalse2truefalsefalse-177176000-177176falsefalsefalsefalsefalse3truefalsefalse-368725000-368725[1]falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash inflow (outflow) from investing activity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 truefalseNet cash (used in) provided by investing activities49true0us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseFinancing activities50false0us-gaap_ProceedsFromShortTermDebtus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse150000000150000falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow from a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph b falsefalseChange in short-term debt, net51false0us-gaap_RepaymentsOfLongTermDebtAndCapitalSecuritiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-200867000-200867falsefalsefalsefalsefalse2truefalsefalse-114846000-114846falsefalsefalsefalsefalse3truefalsefalse-350296000-350296falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow associated with security instrument that either represents a creditor or an ownership relationship with the holder of the investment security with a maturity of beyond one year or normal operating cycle, if longer. The nature of such security interests included herein may consist of debt securities, long-term capital lease obligations, and capital securities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b falsefalseRetirement of long-term obligations52false0us-gaap_RepaymentsOfLongTermCapitalLeaseObligationsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-1701000-1701falsefalsefalsefalsefalse2truefalsefalse-1422000-1422falsefalsefalsefalsefalse3truefalsefalse-116000-116falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow for the obligation for lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26, 31 falsefalseRepayment of capital leases53false0us-gaap_ProceedsFromIssuanceOfLongTermDebtus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse247245000247245falsefalsefalsefalsefalse2truefalsefalse255369000255369falsefalsefalsefalsefalse3truefalsefalse651541000651541falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph b falsefalseIssuance of long-term debt54false0us-gaap_PaymentsOfFinancingCostsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-6851000-6851falsefalsefalsefalsefalse2truefalsefalse-1953000-1953falsefalsefalsefalsefalse3truefalsefalse-361000-361falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18, 19, 20 falsefalseDeferred financing costs55false0us-gaap_PaymentsForProceedsFromHedgeFinancingActivitiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse56750005675falsefalsefalsefalsefalse2truefalsefalse46960004696falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash outflow (inflow) for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 14 -Subparagraph FN4 falsefalseSettlement of treasury rate lock56false0us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStockus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-46000-46falsefalsefalsefalsefalse2truefalsefalse-46000-46falsefalsefalsefalsefalse3truefalsefalse-46000-46falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow for the return on capital for preferred shareholders.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a falsefalseDividends paid on preferred stock57false0us-gaap_PaymentsOfDividendsCommonStockus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-58988000-58988falsefalsefalsefalsefalse2truefalsefalse-54221000-54221falsefalsefalsefalsefalse3truefalsefalse-54036000-54036falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow from the distribution of an entity's earnings in the form of dividends to common shareholders.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a falsefalseDividends paid on common stock58false0us-gaap_ProceedsFromPaymentsForOtherFinancingActivitiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse32000003200falsefalsefalsefalsefalse2truefalsefalse21300002130falsefalsefalsefalsefalse3truefalsefalse983000983falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash inflow (outflow) from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18, 19, 20 falsefalseOther financing59false0us-gaap_NetCashProvidedByUsedInFinancingActivitiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse137667000137667falsefalsefalsefalsefalse2truefalsefalse8970700089707falsefalsefalsefalsefalse3truefalsefalse247669000247669falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash inflow (outflow) from financing activity for the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 falsefalseNet cash (used in) provided by financing activities60false0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse4593500045935falsefalsefalsefalsefalse2truefalsefalse4771000047710falsefalsefalsefalsefalse3truefalsefalse-31530000-31530falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change between the beginning and ending balance of cash and cash equivalents.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 truefalseNet (decrease) increase in cash and cash equivalents61false0us-gaap_CashAndCashEquivalentsAtCarryingValueus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1truefalsefalse145193000145193falsefalsefalsefalsefalse2truefalsefalse9748300097483falsefalsefalsefalsefalse3truefalsefalse129013000129013falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryIncludes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 falsefalseCash and cash equivalents at beginning of period62false0us-gaap_CashAndCashEquivalentsAtCarryingValueus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetruefalseperiodendlabel1truefalsefalse191128000191128falsefalsefalsefalsefalse2truefalsefalse145193000145193falsefalsefalsefalsefalse3truefalsefalse9748300097483falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryIncludes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 falsefalseCash and cash equivalents at end of period63true0cnl_SupplementaryCashFlowInformationAbstractcnlfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSupplementary cash flow information64false0us-gaap_InterestPaidNetus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse9077300090773falsefalsefalsefalsefalse2truefalsefalse8462900084629falsefalsefalsefalsefalse3truefalsefalse5291300052913falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of cash paid during the current period for interest owed on money borrowed, net of interest capitalized.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 29 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 27 -Subparagraph e falsefalseInterest paid (net of amount capitalized)65false0us-gaap_IncomeTaxesPaidNetus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse7549800075498falsefalsefalsefalsefalse2truefalsefalse-30309000-30309falsefalsefalsefalsefalse3truefalsefalse4021300040213falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 29 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 27 -Subparagraph f falsefalseIncome taxes (refunded) paid, net66true0cnl_SupplementaryNoncashInvestingAndFinancingActivitiescnlfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSupplementary non-cash investing and financing activities67false0us-gaap_CapitalExpendituresIncurredButNotYetPaidus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1776500017765falsefalsefalsefalsefalse2truefalsefalse30690003069falsefalsefalsefalsefalse3truefalsefalse1693500016935falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryFuture cash outflow to pay for purchases of fixed assets that have occurred.No authoritative reference available.falsefalseAccrued additions to property, plant and equipment not reported above68false0cnl_TreasuryStockIssuedcnlfalsedebitdurationThe fair value of treasury stock issued in noncash financing activities.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse9300093falsefalsefalsefalsefalse2truefalsefalse117000117falsefalsefalsefalsefalse3truefalsefalse103000103falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe fair value of treasury stock issued in noncash financing activities.No authoritative reference available.falsefalseIssuance of treasury stock - LTICP69false0cnl_CommonStockIssuedcnlfalsedebitdurationThe fair value of common stock issued in noncash financing activities.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse299000299falsefalsefalsefalsefalse2truefalsefalse290000290falsefalsefalsefalsefalse3truefalsefalse163000163falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe fair value of common stock issued in noncash financing activities.No authoritative reference available.falsefalseIssuance of common stock - LTICP/ESPP70false0cnl_IncurrenceOfCapitalLeaseObligationBargescnlfalsedebitdurationThis is supplementary information on the Cash Flow Statement. Entering into a capital lease is considered a non-cash...falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse00falsefalsefalsefalsefalse2truefalsefalse2205000022050falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis is supplementary information on the Cash Flow Statement. Entering into a capital lease is considered a non-cash financing activity per the authoritative accounting guidance.No authoritative reference available.falsefalseIncurrence of capital lease obligation - barges71false0us-gaap_FairValueOfAssetsAcquiredus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse152067000152067falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe fair value of assets acquired in noncash investing or financing activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 falsefalseNon-cash additions to property, plant and equipment72false0us-gaap_NotesReductionus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse152067000152067falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe value of notes retired (or transferred to another entity) in noncash investing or financing transactions.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 falsefalseNon-cash return of investment73false0cnl_NonCashContributionToSubsidiaryNetOfTaxcnlfalsedebitdurationValue of property contributed in noncash investing and financing activities, net of tax.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse225732000225732falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryValue of property contributed in noncash investing and financing activities, net of tax.No authoritative reference available.falsefalseNon-cash contribution to subsidiary, net of tax74false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://cleco.com/role/consolidatedstatementsofcashflows1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalseUSDtruefalse{dei_LegalEntityAxis} : CLECO POWER LLC [Member] 1/1/2010 - 12/31/2010 USD ($) $c00051http://www.sec.gov/CIK0001089819duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseCLECO POWER LLCdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicnl_ClecoPowerLlcMemberdei_LegalEntityAxisexplicitMemberu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5falsefalseUSDtruefalse{dei_LegalEntityAxis} : CLECO POWER LLC [Member] 1/1/2009 - 12/31/2009 USD ($) $c00033http://www.sec.gov/CIK0001089819duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseCLECO POWER LLCdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicnl_ClecoPowerLlcMemberdei_LegalEntityAxisexplicitMemberu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6falsefalseUSDtruefalse{dei_LegalEntityAxis} : CLECO POWER LLC [Member] 1/1/2008 - 12/31/2008 USD ($) $c00024http://www.sec.gov/CIK0001089819duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseCLECO POWER LLCdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicnl_ClecoPowerLlcMemberdei_LegalEntityAxisexplicitMemberu000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseCLECO POWER LLC75true0us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities include all transactions and events that are not defined as investing or financing activities. Operating activities generally involve producing and delivering goods and providing services. Cash flows from operating activities are generally the cash effects of transactions and other events that enter into the determination of net income.falsefalseOperating activities76false0cnl_NetIncomecnlfalsecreditdurationThe profit or loss of the entity net of income taxes for the reporting period, calculated and presented in the income...falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse147405000147405falsefalsefalsefalsefalse2truefalsefalse111166000111166falsefalsefalsefalsefalse3truefalsefalse113832000113832falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe profit or loss of the entity net of income taxes for the reporting period, calculated and presented in the income statement in accordance with GAAP.No authoritative reference available.falsefalseNet Income77true0us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseAdjustments to reconcile net income to net cash (used in) provided by operating activities78false0us-gaap_DepreciationDepletionAndAmortizationus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse119940000119940falsefalsefalsefalsefalse2truefalsefalse8884300088843falsefalsefalsefalsefalse3truefalsefalse8603500086035falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.No authoritative reference available.falsefalseDepreciation and amortization79false0us-gaap_ProvisionForDoubtfulAccountsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse14920001492falsefalsefalsefalsefalse2truefalsefalse16820001682falsefalsefalsefalsefalse3truefalsefalse38210003821falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 falsefalseProvision for doubtful accounts80false0us-gaap_ShareBasedCompensationus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse18460001846falsefalsefalsefalsefalse2truefalsefalse18550001855falsefalsefalsefalsefalse3truefalsefalse143000143falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock options, amortization of restricted stock, and adjustment for officers compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseUnearned compensation expense81false0us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquityus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-12413000-12413falsefalsefalsefalsefalse2truefalsefalse-73269000-73269falsefalsefalsefalsefalse3truefalsefalse-64953000-64953falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 15 falsefalseAllowance for other funds used during construction82false0cnl_AmortizationOfInvestmentTaxCreditscnlfalsecreditdurationThe amortization of the amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain...falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-1285000-1285falsefalsefalsefalsefalse2truefalsefalse-1332000-1332falsefalsefalsefalsefalse3truefalsefalse-1380000-1380falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amortization of the amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.No authoritative reference available.falsefalseAmortization of investment tax credits83false0us-gaap_DeferredIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3455500034555falsefalsefalsefalsefalse2truefalsefalse32300003230falsefalsefalsefalsefalse3truefalsefalse1448200014482falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing the net change in the entity's deferred tax assets and liabilities pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseNet deferred income taxes84false0us-gaap_IncreaseDecreaseInDeferredFuelCostsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2108600021086falsefalsefalsefalsefalse2truefalsefalse72230007223falsefalsefalsefalsefalse3truefalsefalse64440006444falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in carrying amount of capitalized fuel costs of a regulated entity that are expected to be recoverable through rate adjustments within one year or the normal operating cycle, if longer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseDeferred fuel costs85false0us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContractsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-405000-405falsefalsefalsefalsefalse2truefalsefalse167000167falsefalsefalsefalsefalse3truefalsefalse22130002213falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate increase (decrease) in the market value of open derivatives, commodity, or energy contracts. These gains (losses) are included in earnings.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseLoss (gain) on economic hedges86false0us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValueus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-345000-345falsefalsefalsefalsefalse2truefalsefalse-454000-454falsefalsefalsefalsefalse3truefalsefalse-427000-427falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Technical Bulletin (FTB) -Number 85-4 -Paragraph 2 falsefalseCash surrender value of company-/trust-owned life insurance87true0us-gaap_IncreaseDecreaseInOperatingCapitalAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseChanges in assets and liabilities88false0us-gaap_IncreaseDecreaseInAccountsReceivableus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-35261000-35261falsefalsefalsefalsefalse2truefalsefalse96460009646falsefalsefalsefalsefalse3truefalsefalse-5972000-5972falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseAccounts receivable89false0cnl_IncreaseDecreaseInAccountsAndNotesReceivableAffiliatecnlfalsecreditdurationThe net change during the reporting period of the aggregate amount of receivables to be collected from related parties where...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse349000349falsefalsefalsefalsefalse2truefalsefalse-656000-656falsefalsefalsefalsefalse3truefalsefalse1545300015453falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period of the aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.No authoritative reference available.falsefalseAccounts and notes receivable, affiliate90false0cnl_IncreaseDecreaseInUnbilledRevenuecnlfalsecreditdurationThe net change during the reporting period in the unbilled amounts due for services rendered or products shipped. This...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-22675000-22675falsefalsefalsefalsefalse2truefalsefalse-2262000-2262falsefalsefalsefalsefalse3truefalsefalse-1954000-1954falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the unbilled amounts due for services rendered or products shipped. This element is distinct from unbilled contracts receivables because this is based on noncontract transactions.No authoritative reference available.falsefalseUnbilled revenue91false0us-gaap_IncreaseDecreaseInInventoriesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-7202000-7202falsefalsefalsefalsefalse2truefalsefalse-26680000-26680falsefalsefalsefalsefalse3truefalsefalse-12282000-12282falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseFuel, materials and supplies inventory92false0us-gaap_IncreaseDecreaseInPrepaidExpenseus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-2016000-2016falsefalsefalsefalsefalse2truefalsefalse13860001386falsefalsefalsefalsefalse3truefalsefalse941000941falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalsePrepayments93false0us-gaap_IncreaseDecreaseInAccountsPayableus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse39360003936falsefalsefalsefalsefalse2truefalsefalse1083100010831falsefalsefalsefalsefalse3truefalsefalse942000942falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the aggregate amount of obligations due within one year (or one business cycle). This may include trade payables, amounts due to related parties, royalties payable, and other obligations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseAccounts payable94false0cnl_IncreaseDecreaseInAccountsAndNotesPayableAffiliatecnlfalsecreditdurationThe net change during the reporting period in the carrying amount due to all related parties.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-18598000-18598falsefalsefalsefalsefalse2truefalsefalse1785500017855falsefalsefalsefalsefalse3truefalsefalse-11826000-11826falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the carrying amount due to all related parties.No authoritative reference available.falsefalseAccounts and notes payable, affiliate95false0us-gaap_IncreaseDecreaseInCustomerDepositsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1231300012313falsefalsefalsefalsefalse2truefalsefalse1290600012906falsefalsefalsefalsefalse3truefalsefalse59610005961falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the period in the amount of customer money held in customer accounts, including security deposits, collateral for a current or future transactions, initial payment of the cost of acquisition or for the right to enter into a contract or agreement.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseCustomer deposits96false0us-gaap_PaymentsForPostemploymentBenefitsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse426000426falsefalsefalsefalsefalse2truefalsefalse-13720000-13720falsefalsefalsefalsefalse3truefalsefalse17660001766falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCash outflows for payments of postemployment benefits (such as severance pay and health insurance benefits) recognized during the period. Postemployment benefits are benefits paid to employees after employment but before retirement.No authoritative reference available.falsefalsePost retirement benefit obligation97false0us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-88333000-88333falsefalsefalsefalsefalse2truefalsefalse3292200032922falsefalsefalsefalsefalse3truefalsefalse4379000043790falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the value of assets that are created when regulatory agencies permits public utilities to defer costs (revenues) to the balance sheet. This element is a the net change of regulatory assets and liabilities combined.No authoritative reference available.falsefalseRegulatory assets and liabilities, net98false0cnl_IncreaseDecreaseInOtherDeferredAccountscnlfalsecreditdurationThe net change during the reporting period in other deferred assets and obligations, net, not otherwise defined in the...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-8082000-8082falsefalsefalsefalsefalse2truefalsefalse-37021000-37021falsefalsefalsefalsefalse3truefalsefalse-118075000-118075falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in other deferred assets and obligations, net, not otherwise defined in the taxonomy where the receipts and payments will be made in future periods.No authoritative reference available.falsefalseOther deferred accounts99false0us-gaap_IncreaseDecreaseInRetainagePayableus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse19130001913falsefalsefalsefalsefalse2truefalsefalse-11921000-11921falsefalsefalsefalsefalse3truefalsefalse1270900012709falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in retainage obligations due by the reporting entity that are payable within one year (or one business cycle).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseRetainage payable100false0cnl_IncreaseDecreaseInTaxesAccruedcnlfalsenadurationThe net change during the reporting period of the carrying value of obligations incurred and payable for statutory income,...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-7561000-7561falsefalsefalsefalsefalse2truefalsefalse94300009430falsefalsefalsefalsefalse3truefalsefalse-12950000-12950falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period of the carrying value of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes.No authoritative reference available.falsefalseTaxes accrued101false0us-gaap_IncreaseDecreaseInInterestPayableNetus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse15940001594falsefalsefalsefalsefalse2truefalsefalse-4140000-4140falsefalsefalsefalsefalse3truefalsefalse-67000-67falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseInterest accrued102false0us-gaap_IncreaseDecreaseInRiskManagementAssetsAndLiabilitiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse78850007885falsefalsefalsefalsefalse2truefalsefalse44060004406falsefalsefalsefalsefalse3truefalsefalse-16482000-16482falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change during the reporting period in the aggregate market value of financial instruments that are purchased and held principally for the purpose of hedging or mitigating market risk, credit risk, legal risk, operational risk, and other types of risk.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseRisk management assets and liabilities, net103false0us-gaap_IncreaseDecreaseInOtherOperatingCapitalNetus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-1863000-1863falsefalsefalsefalsefalse2truefalsefalse-367000-367falsefalsefalsefalsefalse3truefalsefalse-86000-86falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryFor entities with classified balance sheets, the net change during the reporting period in the value of other assets or liabilities used in operating activities, that are not otherwise defined in the taxonomy. For entities with unclassified balance sheets, the net change during the reporting period in the value of all other assets or liabilities used in operating activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseOther operating104false0us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse148701000148701falsefalsefalsefalsefalse2truefalsefalse141726000141726falsefalsefalsefalsefalse3truefalsefalse6207800062078[1]falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash from (used in) the entity's continuing operations. This element specifically EXCLUDES the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in operating activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 -Footnote 10 truefalseNet cash (used in) provided by operating activities105true0us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseInvesting activities106false0us-gaap_PaymentsToAcquirePropertyPlantAndEquipmentus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-127153000-127153falsefalsefalsefalsefalse2truefalsefalse-249252000-249252falsefalsefalsefalsefalse3truefalsefalse-334652000-334652falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph c falsefalseAdditions to property, plant and equipment107false0us-gaap_AllowanceForFundsUsedDuringConstructionInvestingActivitiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1241300012413falsefalsefalsefalsefalse2truefalsefalse7326900073269falsefalsefalsefalsefalse3truefalsefalse6495300064953falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCash inflow due to change during the period in the allowance for other funds used during construction classified as an investing activity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 falsefalseAllowance for other funds used during construction108false0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipmentus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse783000783falsefalsefalsefalsefalse2truefalsefalse751000751falsefalsefalsefalsefalse3truefalsefalse18940001894falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -Subparagraph c falsefalseProceeds from sale of property, plant and equipment109false0us-gaap_PaymentsToAcquireEquityMethodInvestmentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-200000-200falsefalsefalsefalsefalse2truefalsefalse-12873000-12873falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph b falsefalseEquity investment in investees110false0us-gaap_PaymentsToAcquireLifeInsurancePoliciesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-654000-654falsefalsefalsefalsefalse2truefalsefalse-424000-424falsefalsefalsefalsefalse3truefalsefalse-424000-424falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow for payments to purchase life insurance policies for which the entity is the beneficiary.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 17 falsefalsePremiums paid on company-/trust-owned life insurance111false0us-gaap_ProceedsFromOtherDebtus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse11480001148falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow from other borrowing not otherwise defined in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph b falsefalseAdvances on company-owned life insurance loan112false0us-gaap_RepaymentsOfOtherDebtus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-14355000-14355falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow for the payment of other borrowing not otherwise defined in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b falsefalseRepayment of company-owned life insurance loan113false0us-gaap_IncreaseDecreaseInRestrictedCashus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse1540400015404falsefalsefalsefalsefalse2truefalsefalse4653100046531falsefalsefalsefalsefalse3truefalsefalse-85019000-85019falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash inflow (outflow) for the net change associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 16, 17 falsefalseTransfer of cash from (to) restricted accounts114false0us-gaap_NetCashProvidedByUsedInInvestingActivitiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse-112614000-112614falsefalsefalsefalsefalse2truefalsefalse-141998000-141998falsefalsefalsefalsefalse3truefalsefalse-353248000-353248[1]falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash inflow (outflow) from investing activity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 truefalseNet cash (used in) provided by investing activities115true0us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseFinancing activities116false0us-gaap_RepaymentsOfLongTermDebtAndCapitalSecuritiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-85704000-85704falsefalsefalsefalsefalse2truefalsefalse-114846000-114846falsefalsefalsefalsefalse3truefalsefalse-250296000-250296falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow associated with security instrument that either represents a creditor or an ownership relationship with the holder of the investment security with a maturity of beyond one year or normal operating cycle, if longer. The nature of such security interests included herein may consist of debt securities, long-term capital lease obligations, and capital securities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b falsefalseRetirement of long-term obligations117false0us-gaap_RepaymentsOfLongTermCapitalLeaseObligationsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-1701000-1701falsefalsefalsefalsefalse2truefalsefalse-1422000-1422falsefalsefalsefalsefalse3truefalsefalse-116000-116falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow for the obligation for lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26, 31 falsefalseRepayment of capital leases118false0us-gaap_ProceedsFromIssuanceOfLongTermDebtus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse247245000247245falsefalsefalsefalsefalse2truefalsefalse190369000190369falsefalsefalsefalsefalse3truefalsefalse621541000621541falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph b falsefalseIssuance of long-term debt119false0us-gaap_PaymentsOfFinancingCostsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-4803000-4803falsefalsefalsefalsefalse2truefalsefalse-1954000-1954falsefalsefalsefalsefalse3truefalsefalse-361000-361falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18, 19, 20 falsefalseDeferred financing costs120false0us-gaap_PaymentsForProceedsFromHedgeFinancingActivitiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse56750005675falsefalsefalsefalsefalse2truefalsefalse46960004696falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash outflow (inflow) for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 14 -Subparagraph FN4 falsefalseSettlement of treasury rate lock121false0us-gaap_PaymentsOfDistributionsToAffiliatesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-150000000-150000falsefalsefalsefalsefalse2truefalsefalse-30000000-30000falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a falsefalseDistribution to parent122false0us-gaap_NetCashProvidedByUsedInFinancingActivitiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse1071200010712falsefalsefalsefalsefalse2truefalsefalse4684300046843falsefalsefalsefalsefalse3truefalsefalse370768000370768falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net cash inflow (outflow) from financing activity for the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 falsefalseNet cash (used in) provided by financing activities123false0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse4679900046799falsefalsefalsefalsefalse2truefalsefalse4657100046571falsefalsefalsefalsefalse3truefalsefalse7959800079598falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe net change between the beginning and ending balance of cash and cash equivalents.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 truefalseNet (decrease) increase in cash and cash equivalents124false0us-gaap_CashAndCashEquivalentsAtCarryingValueus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1truefalsefalse138113000138113falsefalsefalsefalsefalse2truefalsefalse9154200091542falsefalsefalsefalsefalse3truefalsefalse1194400011944falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryIncludes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 falsefalseCash and cash equivalents at beginning of period125false0us-gaap_CashAndCashEquivalentsAtCarryingValueus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetruefalseperiodendlabel1truefalsefalse184912000184912falsefalsefalsefalsefalse2truefalsefalse138113000138113falsefalsefalsefalsefalse3truefalsefalse9154200091542falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryIncludes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 falsefalseCash and cash equivalents at end of period126true0cnl_SupplementaryCashFlowInformationAbstractcnlfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSupplementary cash flow information127false0us-gaap_InterestPaidNetus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse7904400079044falsefalsefalsefalsefalse2truefalsefalse8150800081508falsefalsefalsefalsefalse3truefalsefalse4784000047840falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of cash paid during the current period for interest owed on money borrowed, net of interest capitalized.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 29 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 27 -Subparagraph e falsefalseInterest paid (net of amount capitalized)128false0us-gaap_IncomeTaxesPaidNetus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse-5425000-5425falsefalsefalsefalsefalse2truefalsefalse44440004444falsefalsefalsefalsefalse3truefalsefalse21000002100falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 29 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 27 -Subparagraph f falsefalseIncome taxes (refunded) paid, net129true0cnl_SupplementaryNoncashInvestingAndFinancingActivitiescnlfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSupplementary non-cash investing and financing activities130false0us-gaap_CapitalExpendituresIncurredButNotYetPaidus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1776500017765falsefalsefalsefalsefalse2truefalsefalse30690003069falsefalsefalsefalsefalse3truefalsefalse1693500016935falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryFuture cash outflow to pay for purchases of fixed assets that have occurred.No authoritative reference available.falsefalseAccrued additions to property, plant and equipment not reported above131false0cnl_IncurrenceOfCapitalLeaseObligationBargescnlfalsedebitdurationThis is supplementary information on the Cash Flow Statement. Entering into a capital lease is considered a non-cash...falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse00falsefalsefalsefalsefalse2truefalsefalse2205000022050falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis is supplementary information on the Cash Flow Statement. Entering into a capital lease is considered a non-cash financing activity per the authoritative accounting guidance.No authoritative reference available.falsefalseIncurrence of capital lease obligation - barges132false0us-gaap_ContributionOfPropertyus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse304134000304134falsefalsefalsefalsefalse2truefalsefalse00falsefalsefalsefalsefalse3truefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryValue of property contributed in noncash investing and financing activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 falsefalseNon-cash additions to property, plant & equipment133false0us-gaap_LiabilitiesAssumedus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse7840200078402falsetruefalsefalsefalse2truefalsefalse00falsetruefalsefalsefalse3truefalsefalse00falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe fair value of liabilities assumed in Noncash investing or financing activities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 falsefalseNon-cash assumption of deferred tax liability1Non-cash activities between the operating and investing sections in the amount of $222.1 million are excluded from the 2008 cash flow statement. These non-cash activities are related to 2008 storm costs and storm financing. There were no similar activities in 2009 or 2010.3133Consolidated Statements of Cash Flows (USD $)ThousandsUnKnownUnKnownUnKnownfalsetrue