3.26.1 html 2210 786 1 true 394 0 false 11 false false R1.htm 0000001 - Document - COVER PAGE Sheet http://www.citigroup.com/role/COVERPAGE COVER PAGE Cover 1 false false R2.htm 9952151 - Statement - CONSOLIDATED STATEMENT OF INCOME (UNAUDITED) Sheet http://www.citigroup.com/role/CONSOLIDATEDSTATEMENTOFINCOMEUNAUDITED CONSOLIDATED STATEMENT OF INCOME (UNAUDITED) Statements 2 false false R3.htm 9952152 - Statement - CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (UNAUDITED) Sheet http://www.citigroup.com/role/CONSOLIDATEDSTATEMENTOFCOMPREHENSIVEINCOMEUNAUDITED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (UNAUDITED) Statements 3 false false R4.htm 9952153 - Statement - CONSOLIDATED BALANCE SHEET Sheet http://www.citigroup.com/role/CONSOLIDATEDBALANCESHEET CONSOLIDATED BALANCE SHEET Statements 4 false false R5.htm 9952154 - Statement - CONSOLIDATED BALANCE SHEET (Parenthetical) Sheet http://www.citigroup.com/role/CONSOLIDATEDBALANCESHEETParenthetical CONSOLIDATED BALANCE SHEET (Parenthetical) Statements 5 false false R6.htm 9952155 - Statement - CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) Sheet http://www.citigroup.com/role/CONSOLIDATEDSTATEMENTOFCHANGESINSTOCKHOLDERSEQUITYUNAUDITED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) Statements 6 false false R7.htm 9952156 - Statement - CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) Sheet http://www.citigroup.com/role/CONSOLIDATEDSTATEMENTOFCHANGESINSTOCKHOLDERSEQUITYUNAUDITEDParenthetical CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) Statements 7 false false R8.htm 9952157 - Statement - CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) Sheet http://www.citigroup.com/role/CONSOLIDATEDSTATEMENTOFCASHFLOWSUNAUDITED CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) Statements 8 false false R9.htm 9952158 - Disclosure - BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES Sheet http://www.citigroup.com/role/BASISOFPRESENTATIONUPDATEDACCOUNTINGPOLICIESANDACCOUNTINGCHANGES BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES Notes 9 false false R10.htm 9952159 - Disclosure - SIGNIFICANT DISPOSALS AND OTHER BUSINESS EXITS Sheet http://www.citigroup.com/role/SIGNIFICANTDISPOSALSANDOTHERBUSINESSEXITS SIGNIFICANT DISPOSALS AND OTHER BUSINESS EXITS Notes 10 false false R11.htm 9952160 - Disclosure - REPORTABLE BUSINESS SEGMENTS AND ALL OTHER Sheet http://www.citigroup.com/role/REPORTABLEBUSINESSSEGMENTSANDALLOTHER REPORTABLE BUSINESS SEGMENTS AND ALL OTHER Notes 11 false false R12.htm 9952161 - Disclosure - INTEREST INCOME AND EXPENSE Sheet http://www.citigroup.com/role/INTERESTINCOMEANDEXPENSE INTEREST INCOME AND EXPENSE Notes 12 false false R13.htm 9952162 - Disclosure - COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES Sheet http://www.citigroup.com/role/COMMISSIONSANDFEESADMINISTRATIONANDOTHERFIDUCIARYFEES COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES Notes 13 false false R14.htm 9952163 - Disclosure - PRINCIPAL TRANSACTIONS Sheet http://www.citigroup.com/role/PRINCIPALTRANSACTIONS PRINCIPAL TRANSACTIONS Notes 14 false false R15.htm 9952164 - Disclosure - INCENTIVE PLANS Sheet http://www.citigroup.com/role/INCENTIVEPLANS INCENTIVE PLANS Notes 15 false false R16.htm 9952165 - Disclosure - RETIREMENT BENEFITS Sheet http://www.citigroup.com/role/RETIREMENTBENEFITS RETIREMENT BENEFITS Notes 16 false false R17.htm 9952166 - Disclosure - EARNINGS PER SHARE Sheet http://www.citigroup.com/role/EARNINGSPERSHARE EARNINGS PER SHARE Notes 17 false false R18.htm 9952167 - Disclosure - SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS Sheet http://www.citigroup.com/role/SECURITIESBORROWEDLOANEDANDSUBJECTTOREPURCHASEAGREEMENTS SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS Notes 18 false false R19.htm 9952168 - Disclosure - INVESTMENTS Sheet http://www.citigroup.com/role/INVESTMENTS INVESTMENTS Notes 19 false false R20.htm 9952169 - Disclosure - LOANS Sheet http://www.citigroup.com/role/LOANS LOANS Notes 20 false false R21.htm 9952170 - Disclosure - ALLOWANCE FOR CREDIT LOSSES Sheet http://www.citigroup.com/role/ALLOWANCEFORCREDITLOSSES ALLOWANCE FOR CREDIT LOSSES Notes 21 false false R22.htm 9952171 - Disclosure - GOODWILL AND INTANGIBLE ASSETS Sheet http://www.citigroup.com/role/GOODWILLANDINTANGIBLEASSETS GOODWILL AND INTANGIBLE ASSETS Notes 22 false false R23.htm 9952172 - Disclosure - DEPOSITS Sheet http://www.citigroup.com/role/DEPOSITS DEPOSITS Notes 23 false false R24.htm 9952173 - Disclosure - DEBT Sheet http://www.citigroup.com/role/DEBT DEBT Notes 24 false false R25.htm 9952174 - Disclosure - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) Sheet http://www.citigroup.com/role/CHANGESINACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAOCI CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) Notes 25 false false R26.htm 9952175 - Disclosure - PREFERRED STOCK Sheet http://www.citigroup.com/role/PREFERREDSTOCK PREFERRED STOCK Notes 26 false false R27.htm 9952176 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIES SECURITIZATIONS AND VARIABLE INTEREST ENTITIES Notes 27 false false R28.htm 9952177 - Disclosure - DERIVATIVES Sheet http://www.citigroup.com/role/DERIVATIVES DERIVATIVES Notes 28 false false R29.htm 9952178 - Disclosure - FAIR VALUE MEASUREMENT Sheet http://www.citigroup.com/role/FAIRVALUEMEASUREMENT FAIR VALUE MEASUREMENT Notes 29 false false R30.htm 9952179 - Disclosure - FAIR VALUE ELECTIONS Sheet http://www.citigroup.com/role/FAIRVALUEELECTIONS FAIR VALUE ELECTIONS Notes 30 false false R31.htm 9952180 - Disclosure - GUARANTEES AND COMMITMENTS Sheet http://www.citigroup.com/role/GUARANTEESANDCOMMITMENTS GUARANTEES AND COMMITMENTS Notes 31 false false R32.htm 9952181 - Disclosure - LEASES Sheet http://www.citigroup.com/role/LEASES LEASES Notes 32 false false R33.htm 9952182 - Disclosure - CONTINGENCIES Sheet http://www.citigroup.com/role/CONTINGENCIES CONTINGENCIES Notes 33 false false R34.htm 9952183 - Disclosure - SUBSIDIARY GUARANTEES Sheet http://www.citigroup.com/role/SUBSIDIARYGUARANTEES SUBSIDIARY GUARANTEES Notes 34 false false R35.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 35 false false R36.htm 9955511 - Disclosure - BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Policies) Sheet http://www.citigroup.com/role/BASISOFPRESENTATIONUPDATEDACCOUNTINGPOLICIESANDACCOUNTINGCHANGESPolicies BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Policies) Policies 36 false false R37.htm 9955512 - Disclosure - SIGNIFICANT DISPOSALS AND OTHER BUSINESS EXITS (Tables) Sheet http://www.citigroup.com/role/SIGNIFICANTDISPOSALSANDOTHERBUSINESSEXITSTables SIGNIFICANT DISPOSALS AND OTHER BUSINESS EXITS (Tables) Tables http://www.citigroup.com/role/SIGNIFICANTDISPOSALSANDOTHERBUSINESSEXITS 37 false false R38.htm 9955513 - Disclosure - REPORTABLE BUSINESS SEGMENTS AND ALL OTHER (Tables) Sheet http://www.citigroup.com/role/REPORTABLEBUSINESSSEGMENTSANDALLOTHERTables REPORTABLE BUSINESS SEGMENTS AND ALL OTHER (Tables) Tables http://www.citigroup.com/role/REPORTABLEBUSINESSSEGMENTSANDALLOTHER 38 false false R39.htm 9955514 - Disclosure - INTEREST INCOME AND EXPENSE (Tables) Sheet http://www.citigroup.com/role/INTERESTINCOMEANDEXPENSETables INTEREST INCOME AND EXPENSE (Tables) Tables http://www.citigroup.com/role/INTERESTINCOMEANDEXPENSE 39 false false R40.htm 9955515 - Disclosure - COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES (Tables) Sheet http://www.citigroup.com/role/COMMISSIONSANDFEESADMINISTRATIONANDOTHERFIDUCIARYFEESTables COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES (Tables) Tables http://www.citigroup.com/role/COMMISSIONSANDFEESADMINISTRATIONANDOTHERFIDUCIARYFEES 40 false false R41.htm 9955516 - Disclosure - PRINCIPAL TRANSACTIONS (Tables) Sheet http://www.citigroup.com/role/PRINCIPALTRANSACTIONSTables PRINCIPAL TRANSACTIONS (Tables) Tables http://www.citigroup.com/role/PRINCIPALTRANSACTIONS 41 false false R42.htm 9955517 - Disclosure - RETIREMENT BENEFITS (Tables) Sheet http://www.citigroup.com/role/RETIREMENTBENEFITSTables RETIREMENT BENEFITS (Tables) Tables http://www.citigroup.com/role/RETIREMENTBENEFITS 42 false false R43.htm 9955518 - Disclosure - EARNINGS PER SHARE (Tables) Sheet http://www.citigroup.com/role/EARNINGSPERSHARETables EARNINGS PER SHARE (Tables) Tables http://www.citigroup.com/role/EARNINGSPERSHARE 43 false false R44.htm 9955519 - Disclosure - SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS (Tables) Sheet http://www.citigroup.com/role/SECURITIESBORROWEDLOANEDANDSUBJECTTOREPURCHASEAGREEMENTSTables SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS (Tables) Tables http://www.citigroup.com/role/SECURITIESBORROWEDLOANEDANDSUBJECTTOREPURCHASEAGREEMENTS 44 false false R45.htm 9955520 - Disclosure - INVESTMENTS (Tables) Sheet http://www.citigroup.com/role/INVESTMENTSTables INVESTMENTS (Tables) Tables http://www.citigroup.com/role/INVESTMENTS 45 false false R46.htm 9955521 - Disclosure - LOANS (Tables) Sheet http://www.citigroup.com/role/LOANSTables LOANS (Tables) Tables http://www.citigroup.com/role/LOANS 46 false false R47.htm 9955522 - Disclosure - ALLOWANCE FOR CREDIT LOSSES (Tables) Sheet http://www.citigroup.com/role/ALLOWANCEFORCREDITLOSSESTables ALLOWANCE FOR CREDIT LOSSES (Tables) Tables http://www.citigroup.com/role/ALLOWANCEFORCREDITLOSSES 47 false false R48.htm 9955523 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables) Sheet http://www.citigroup.com/role/GOODWILLANDINTANGIBLEASSETSTables GOODWILL AND INTANGIBLE ASSETS (Tables) Tables http://www.citigroup.com/role/GOODWILLANDINTANGIBLEASSETS 48 false false R49.htm 9955524 - Disclosure - DEPOSITS (Tables) Sheet http://www.citigroup.com/role/DEPOSITSTables DEPOSITS (Tables) Tables http://www.citigroup.com/role/DEPOSITS 49 false false R50.htm 9955525 - Disclosure - DEBT (Tables) Sheet http://www.citigroup.com/role/DEBTTables DEBT (Tables) Tables http://www.citigroup.com/role/DEBT 50 false false R51.htm 9955526 - Disclosure - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) (Tables) Sheet http://www.citigroup.com/role/CHANGESINACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAOCITables CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) (Tables) Tables http://www.citigroup.com/role/CHANGESINACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAOCI 51 false false R52.htm 9955527 - Disclosure - PREFERRED STOCK (Tables) Sheet http://www.citigroup.com/role/PREFERREDSTOCKTables PREFERRED STOCK (Tables) Tables http://www.citigroup.com/role/PREFERREDSTOCK 52 false false R53.htm 9955528 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES (Tables) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESTables SECURITIZATIONS AND VARIABLE INTEREST ENTITIES (Tables) Tables http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIES 53 false false R54.htm 9955529 - Disclosure - DERIVATIVES (Tables) Sheet http://www.citigroup.com/role/DERIVATIVESTables DERIVATIVES (Tables) Tables http://www.citigroup.com/role/DERIVATIVES 54 false false R55.htm 9955530 - Disclosure - FAIR VALUE MEASUREMENT (Tables) Sheet http://www.citigroup.com/role/FAIRVALUEMEASUREMENTTables FAIR VALUE MEASUREMENT (Tables) Tables http://www.citigroup.com/role/FAIRVALUEMEASUREMENT 55 false false R56.htm 9955531 - Disclosure - FAIR VALUE ELECTIONS (Tables) Sheet http://www.citigroup.com/role/FAIRVALUEELECTIONSTables FAIR VALUE ELECTIONS (Tables) Tables http://www.citigroup.com/role/FAIRVALUEELECTIONS 56 false false R57.htm 9955532 - Disclosure - GUARANTEES AND COMMITMENTS (Tables) Sheet http://www.citigroup.com/role/GUARANTEESANDCOMMITMENTSTables GUARANTEES AND COMMITMENTS (Tables) Tables http://www.citigroup.com/role/GUARANTEESANDCOMMITMENTS 57 false false R58.htm 9955533 - Disclosure - LEASES (Tables) Sheet http://www.citigroup.com/role/LEASESTables LEASES (Tables) Tables http://www.citigroup.com/role/LEASES 58 false false R59.htm 9955534 - Disclosure - SUBSIDIARY GUARANTEES (Tables) Sheet http://www.citigroup.com/role/SUBSIDIARYGUARANTEESTables SUBSIDIARY GUARANTEES (Tables) Tables http://www.citigroup.com/role/SUBSIDIARYGUARANTEES 59 false false R60.htm 9955535 - Disclosure - SIGNIFICANT DISPOSALS AND OTHER BUSINESS EXITS (Details) Sheet http://www.citigroup.com/role/SIGNIFICANTDISPOSALSANDOTHERBUSINESSEXITSDetails SIGNIFICANT DISPOSALS AND OTHER BUSINESS EXITS (Details) Details http://www.citigroup.com/role/SIGNIFICANTDISPOSALSANDOTHERBUSINESSEXITSTables 60 false false R61.htm 9955536 - Disclosure - REPORTABLE BUSINESS SEGMENTS AND ALL OTHER - Operations by Segment (Details) Sheet http://www.citigroup.com/role/REPORTABLEBUSINESSSEGMENTSANDALLOTHEROperationsbySegmentDetails REPORTABLE BUSINESS SEGMENTS AND ALL OTHER - Operations by Segment (Details) Details 61 false false R62.htm 9955537 - Disclosure - REPORTABLE BUSINESS SEGMENTS AND ALL OTHER - Reconciliation (Details) Sheet http://www.citigroup.com/role/REPORTABLEBUSINESSSEGMENTSANDALLOTHERReconciliationDetails REPORTABLE BUSINESS SEGMENTS AND ALL OTHER - Reconciliation (Details) Details 62 false false R63.htm 9955538 - Disclosure - INTEREST INCOME AND EXPENSE (Details) Sheet http://www.citigroup.com/role/INTERESTINCOMEANDEXPENSEDetails INTEREST INCOME AND EXPENSE (Details) Details http://www.citigroup.com/role/INTERESTINCOMEANDEXPENSETables 63 false false R64.htm 9955539 - Disclosure - COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES - Commissions and Fees Revenue (Details) Sheet http://www.citigroup.com/role/COMMISSIONSANDFEESADMINISTRATIONANDOTHERFIDUCIARYFEESCommissionsandFeesRevenueDetails COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES - Commissions and Fees Revenue (Details) Details 64 false false R65.htm 9955540 - Disclosure - COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES - Administration and Other Fiduciary Fees (Details) Sheet http://www.citigroup.com/role/COMMISSIONSANDFEESADMINISTRATIONANDOTHERFIDUCIARYFEESAdministrationandOtherFiduciaryFeesDetails COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES - Administration and Other Fiduciary Fees (Details) Details 65 false false R66.htm 9955541 - Disclosure - PRINCIPAL TRANSACTIONS (Details) Sheet http://www.citigroup.com/role/PRINCIPALTRANSACTIONSDetails PRINCIPAL TRANSACTIONS (Details) Details http://www.citigroup.com/role/PRINCIPALTRANSACTIONSTables 66 false false R67.htm 9955542 - Disclosure - RETIREMENT BENEFITS - Net (Benefit) Expense (Details) Sheet http://www.citigroup.com/role/RETIREMENTBENEFITSNetBenefitExpenseDetails RETIREMENT BENEFITS - Net (Benefit) Expense (Details) Details 67 false false R68.htm 9955543 - Disclosure - RETIREMENT BENEFITS - Contributions (Details) Sheet http://www.citigroup.com/role/RETIREMENTBENEFITSContributionsDetails RETIREMENT BENEFITS - Contributions (Details) Details 68 false false R69.htm 9955544 - Disclosure - EARNINGS PER SHARE (Details) Sheet http://www.citigroup.com/role/EARNINGSPERSHAREDetails EARNINGS PER SHARE (Details) Details http://www.citigroup.com/role/EARNINGSPERSHARETables 69 false false R70.htm 9955545 - Disclosure - SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Securities (Details) Sheet http://www.citigroup.com/role/SECURITIESBORROWEDLOANEDANDSUBJECTTOREPURCHASEAGREEMENTSSecuritiesDetails SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Securities (Details) Details http://www.citigroup.com/role/SECURITIESBORROWEDLOANEDANDSUBJECTTOREPURCHASEAGREEMENTSTables 70 false false R71.htm 9955546 - Disclosure - SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Offsetting (Details) Sheet http://www.citigroup.com/role/SECURITIESBORROWEDLOANEDANDSUBJECTTOREPURCHASEAGREEMENTSOffsettingDetails SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Offsetting (Details) Details http://www.citigroup.com/role/SECURITIESBORROWEDLOANEDANDSUBJECTTOREPURCHASEAGREEMENTSTables 71 false false R72.htm 9955547 - Disclosure - SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements by Contractual Maturity (Details) Sheet http://www.citigroup.com/role/SECURITIESBORROWEDLOANEDANDSUBJECTTOREPURCHASEAGREEMENTSRepurchaseAgreementsbyContractualMaturityDetails SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements by Contractual Maturity (Details) Details 72 false false R73.htm 9955548 - Disclosure - SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements by Class of Collateral (Details) Sheet http://www.citigroup.com/role/SECURITIESBORROWEDLOANEDANDSUBJECTTOREPURCHASEAGREEMENTSRepurchaseAgreementsbyClassofCollateralDetails SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements by Class of Collateral (Details) Details 73 false false R74.htm 9955549 - Disclosure - INVESTMENTS - Overview (Details) Sheet http://www.citigroup.com/role/INVESTMENTSOverviewDetails INVESTMENTS - Overview (Details) Details 74 false false R75.htm 9955550 - Disclosure - INVESTMENTS - Fair Value of AFS Securities (Details) Sheet http://www.citigroup.com/role/INVESTMENTSFairValueofAFSSecuritiesDetails INVESTMENTS - Fair Value of AFS Securities (Details) Details 75 false false R76.htm 9955551 - Disclosure - INVESTMENTS - Fair Value of AFS Debt Securities by Contractual Maturity Date (Details) Sheet http://www.citigroup.com/role/INVESTMENTSFairValueofAFSDebtSecuritiesbyContractualMaturityDateDetails INVESTMENTS - Fair Value of AFS Debt Securities by Contractual Maturity Date (Details) Details 76 false false R77.htm 9955552 - Disclosure - INVESTMENTS - Debt Securities Held-to-Maturity (Details) Sheet http://www.citigroup.com/role/INVESTMENTSDebtSecuritiesHeldtoMaturityDetails INVESTMENTS - Debt Securities Held-to-Maturity (Details) Details 77 false false R78.htm 9955553 - Disclosure - INVESTMENTS - Carrying Value and Fair Value of HTM Debt Securities by Contractual Maturity Dates (Details) Sheet http://www.citigroup.com/role/INVESTMENTSCarryingValueandFairValueofHTMDebtSecuritiesbyContractualMaturityDatesDetails INVESTMENTS - Carrying Value and Fair Value of HTM Debt Securities by Contractual Maturity Dates (Details) Details 78 false false R79.htm 9955554 - Disclosure - INVESTMENTS - Recognition and Measurement of Impairment (Details) Sheet http://www.citigroup.com/role/INVESTMENTSRecognitionandMeasurementofImpairmentDetails INVESTMENTS - Recognition and Measurement of Impairment (Details) Details 79 false false R80.htm 9955556 - Disclosure - INVESTMENTS - Carrying Value of Non-marketable Equity Securities Measured Using the Measurement Alternative (Details) Sheet http://www.citigroup.com/role/INVESTMENTSCarryingValueofNonmarketableEquitySecuritiesMeasuredUsingtheMeasurementAlternativeDetails INVESTMENTS - Carrying Value of Non-marketable Equity Securities Measured Using the Measurement Alternative (Details) Details 80 false false R81.htm 9955557 - Disclosure - LOANS - Corporate Loans (Details) Sheet http://www.citigroup.com/role/LOANSCorporateLoansDetails LOANS - Corporate Loans (Details) Details 81 false false R82.htm 9955558 - Disclosure - LOANS - Corporate Loan Delinquency (Details) Sheet http://www.citigroup.com/role/LOANSCorporateLoanDelinquencyDetails LOANS - Corporate Loan Delinquency (Details) Details 82 false false R83.htm 9955559 - Disclosure - LOANS - Corporate Loans Credit Quality Indicators (Details) Sheet http://www.citigroup.com/role/LOANSCorporateLoansCreditQualityIndicatorsDetails LOANS - Corporate Loans Credit Quality Indicators (Details) Details 83 false false R84.htm 9955560 - Disclosure - LOANS - Corporate Loans Gross Credit Losses (Details) Sheet http://www.citigroup.com/role/LOANSCorporateLoansGrossCreditLossesDetails LOANS - Corporate Loans Gross Credit Losses (Details) Details 84 false false R85.htm 9955561 - Disclosure - LOANS - Non-Accrual Corporate Loans (Details) Sheet http://www.citigroup.com/role/LOANSNonAccrualCorporateLoansDetails LOANS - Non-Accrual Corporate Loans (Details) Details 85 false false R86.htm 9955562 - Disclosure - LOANS - Corporate Loan Modifications to Borrowers Experiencing Financial Difficulty (Details) Sheet http://www.citigroup.com/role/LOANSCorporateLoanModificationstoBorrowersExperiencingFinancialDifficultyDetails LOANS - Corporate Loan Modifications to Borrowers Experiencing Financial Difficulty (Details) Details 86 false false R87.htm 9955563 - Disclosure - LOANS - Performance of Modified Corporate Loans (Details) Sheet http://www.citigroup.com/role/LOANSPerformanceofModifiedCorporateLoansDetails LOANS - Performance of Modified Corporate Loans (Details) Details 87 false false R88.htm 9955564 - Disclosure - LOANS - Consumer Loans, Delinquencies and Non-Accrual Details (Details) Sheet http://www.citigroup.com/role/LOANSConsumerLoansDelinquenciesandNonAccrualDetailsDetails LOANS - Consumer Loans, Delinquencies and Non-Accrual Details (Details) Details 88 false false R89.htm 9955565 - Disclosure - LOANS - Interest Income Recognized for Non-Accrual Consumer Loans (Details) Sheet http://www.citigroup.com/role/LOANSInterestIncomeRecognizedforNonAccrualConsumerLoansDetails LOANS - Interest Income Recognized for Non-Accrual Consumer Loans (Details) Details 89 false false R90.htm 9955566 - Disclosure - LOANS - Consumer Loans Credit Scores (Details) Sheet http://www.citigroup.com/role/LOANSConsumerLoansCreditScoresDetails LOANS - Consumer Loans Credit Scores (Details) Details 90 false false R91.htm 9955567 - Disclosure - LOANS - Consumer Loans Gross Credit Losses (Details) Sheet http://www.citigroup.com/role/LOANSConsumerLoansGrossCreditLossesDetails LOANS - Consumer Loans Gross Credit Losses (Details) Details 91 false false R92.htm 9955568 - Disclosure - LOANS - Loan-to-Value Ratios Consumer Loans (Details) Sheet http://www.citigroup.com/role/LOANSLoantoValueRatiosConsumerLoansDetails LOANS - Loan-to-Value Ratios Consumer Loans (Details) Details 92 false false R93.htm 9955569 - Disclosure - LOANS - Consumer Loans and Ratios Outside of North America (Details) Sheet http://www.citigroup.com/role/LOANSConsumerLoansandRatiosOutsideofNorthAmericaDetails LOANS - Consumer Loans and Ratios Outside of North America (Details) Details 93 false false R94.htm 9955570 - Disclosure - LOANS - Types of Consumer Loan Modifications and Their Financial Effect (Details) Sheet http://www.citigroup.com/role/LOANSTypesofConsumerLoanModificationsandTheirFinancialEffectDetails LOANS - Types of Consumer Loan Modifications and Their Financial Effect (Details) Details 94 false false R95.htm 9955571 - Disclosure - LOANS - Performance of Modified Consumer Loans (Details) Sheet http://www.citigroup.com/role/LOANSPerformanceofModifiedConsumerLoansDetails LOANS - Performance of Modified Consumer Loans (Details) Details 95 false false R96.htm 9955572 - Disclosure - LOANS - Defaults of Modified Consumer Loans (Details) Sheet http://www.citigroup.com/role/LOANSDefaultsofModifiedConsumerLoansDetails LOANS - Defaults of Modified Consumer Loans (Details) Details 96 false false R97.htm 9955573 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses Roll Forward (Details) Sheet http://www.citigroup.com/role/ALLOWANCEFORCREDITLOSSESAllowanceforCreditLossesRollForwardDetails ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses Roll Forward (Details) Details 97 false false R98.htm 9955574 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses Roll Forward by Segment (Details) Sheet http://www.citigroup.com/role/ALLOWANCEFORCREDITLOSSESAllowanceforCreditLossesRollForwardbySegmentDetails ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses Roll Forward by Segment (Details) Details 98 false false R99.htm 9955575 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) Sheet http://www.citigroup.com/role/ALLOWANCEFORCREDITLOSSESNarrativeDetails ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) Details 99 false false R100.htm 9955576 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses for Other Assets (Details) Sheet http://www.citigroup.com/role/ALLOWANCEFORCREDITLOSSESScheduleofAllowanceforCreditLossesforOtherAssetsDetails ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses for Other Assets (Details) Details 100 false false R101.htm 9955577 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Changes in Goodwill (Details) Sheet http://www.citigroup.com/role/GOODWILLANDINTANGIBLEASSETSChangesinGoodwillDetails GOODWILL AND INTANGIBLE ASSETS - Changes in Goodwill (Details) Details 101 false false R102.htm 9955578 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Components of Intangible Assets (Details) Sheet http://www.citigroup.com/role/GOODWILLANDINTANGIBLEASSETSComponentsofIntangibleAssetsDetails GOODWILL AND INTANGIBLE ASSETS - Components of Intangible Assets (Details) Details 102 false false R103.htm 9955579 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Changes in Intangible Assets (Details) Sheet http://www.citigroup.com/role/GOODWILLANDINTANGIBLEASSETSChangesinIntangibleAssetsDetails GOODWILL AND INTANGIBLE ASSETS - Changes in Intangible Assets (Details) Details 103 false false R104.htm 9955580 - Disclosure - DEPOSITS (Details) Sheet http://www.citigroup.com/role/DEPOSITSDetails DEPOSITS (Details) Details http://www.citigroup.com/role/DEPOSITSTables 104 false false R105.htm 9955581 - Disclosure - DEBT - Short-Term Borrowings (Details) Sheet http://www.citigroup.com/role/DEBTShortTermBorrowingsDetails DEBT - Short-Term Borrowings (Details) Details 105 false false R106.htm 9955582 - Disclosure - DEBT - Long-Term Debt (Details) Sheet http://www.citigroup.com/role/DEBTLongTermDebtDetails DEBT - Long-Term Debt (Details) Details 106 false false R107.htm 9955583 - Disclosure - DEBT - Trust Preferred Securities (Details) Sheet http://www.citigroup.com/role/DEBTTrustPreferredSecuritiesDetails DEBT - Trust Preferred Securities (Details) Details 107 false false R108.htm 9955584 - Disclosure - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Change in Each Component of AOCI (Details) Sheet http://www.citigroup.com/role/CHANGESINACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAOCIChangeinEachComponentofAOCIDetails CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Change in Each Component of AOCI (Details) Details http://www.citigroup.com/role/CHANGESINACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAOCITables 108 false false R109.htm 9955585 - Disclosure - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Schedule of Pre-Tax and After-Tax (Details) Sheet http://www.citigroup.com/role/CHANGESINACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAOCIScheduleofPreTaxandAfterTaxDetails CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Schedule of Pre-Tax and After-Tax (Details) Details http://www.citigroup.com/role/CHANGESINACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAOCITables 109 false false R110.htm 9955586 - Disclosure - CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Reclassification out of AOCI (Details) Sheet http://www.citigroup.com/role/CHANGESINACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAOCIReclassificationoutofAOCIDetails CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Reclassification out of AOCI (Details) Details http://www.citigroup.com/role/CHANGESINACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSAOCITables 110 false false R111.htm 9955587 - Disclosure - PREFERRED STOCK - Schedule of Preferred Stock Outstanding (Details) Sheet http://www.citigroup.com/role/PREFERREDSTOCKScheduleofPreferredStockOutstandingDetails PREFERRED STOCK - Schedule of Preferred Stock Outstanding (Details) Details 111 false false R112.htm 9955588 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Schedule of Variable Interest Entities (Details) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESScheduleofVariableInterestEntitiesDetails SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Schedule of Variable Interest Entities (Details) Details 112 false false R113.htm 9955589 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Assets and Liabilities of VIEs (Details) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESAssetsandLiabilitiesofVIEsDetails SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Assets and Liabilities of VIEs (Details) Details 113 false false R114.htm 9955590 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Funding Commitments (Details) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESFundingCommitmentsDetails SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Funding Commitments (Details) Details 114 false false R115.htm 9955591 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Carrying Amounts and Classifications of Consolidated Assets (Details) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESCarryingAmountsandClassificationsofConsolidatedAssetsDetails SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Carrying Amounts and Classifications of Consolidated Assets (Details) Details 115 false false R116.htm 9955592 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Credit Card Securitizations (Details) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESCreditCardSecuritizationsDetails SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Credit Card Securitizations (Details) Details 116 false false R117.htm 9955593 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Mortgage Securitizations (Details) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESMortgageSecuritizationsDetails SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Mortgage Securitizations (Details) Details 117 false false R118.htm 9955594 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Loan Delinquencies and Liquidation Losses (Details) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESLoanDelinquenciesandLiquidationLossesDetails SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Loan Delinquencies and Liquidation Losses (Details) Details 118 false false R119.htm 9955595 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Mortgage Servicing Rights (Details) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESMortgageServicingRightsDetails SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Mortgage Servicing Rights (Details) Details 119 false false R120.htm 9955596 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Asset-Backed Commercial Paper Conduits (Details) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESAssetBackedCommercialPaperConduitsDetails SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Asset-Backed Commercial Paper Conduits (Details) Details 120 false false R121.htm 9955597 - Disclosure - SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Asset Based Financing (Details) Sheet http://www.citigroup.com/role/SECURITIZATIONSANDVARIABLEINTERESTENTITIESAssetBasedFinancingDetails SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Asset Based Financing (Details) Details 121 false false R122.htm 9955598 - Disclosure - DERIVATIVES - Derivative Notionals (Details) Sheet http://www.citigroup.com/role/DERIVATIVESDerivativeNotionalsDetails DERIVATIVES - Derivative Notionals (Details) Details 122 false false R123.htm 9955599 - Disclosure - DERIVATIVES - Derivative Mark-to-Market (MTM) Receivables/Payables (Details) Sheet http://www.citigroup.com/role/DERIVATIVESDerivativeMarktoMarketMTMReceivablesPayablesDetails DERIVATIVES - Derivative Mark-to-Market (MTM) Receivables/Payables (Details) Details 123 false false R124.htm 9955600 - Disclosure - DERIVATIVES - Fair Value Hedges (Details) Sheet http://www.citigroup.com/role/DERIVATIVESFairValueHedgesDetails DERIVATIVES - Fair Value Hedges (Details) Details 124 false false R125.htm 9955601 - Disclosure - DERIVATIVES - Cumulative Basis Adjustment (Details) Sheet http://www.citigroup.com/role/DERIVATIVESCumulativeBasisAdjustmentDetails DERIVATIVES - Cumulative Basis Adjustment (Details) Details 125 false false R126.htm 9955602 - Disclosure - DERIVATIVES - Cash Flow Hedges (Details) Sheet http://www.citigroup.com/role/DERIVATIVESCashFlowHedgesDetails DERIVATIVES - Cash Flow Hedges (Details) Details 126 false false R127.htm 9955603 - Disclosure - DERIVATIVES - Net Investment Hedges (Details) Sheet http://www.citigroup.com/role/DERIVATIVESNetInvestmentHedgesDetails DERIVATIVES - Net Investment Hedges (Details) Details 127 false false R128.htm 9955604 - Disclosure - DERIVATIVES - Credit Derivatives (Details) Sheet http://www.citigroup.com/role/DERIVATIVESCreditDerivativesDetails DERIVATIVES - Credit Derivatives (Details) Details 128 false false R129.htm 9955605 - Disclosure - FAIR VALUE MEASUREMENT - Market Valuation Adjustments (Details) Sheet http://www.citigroup.com/role/FAIRVALUEMEASUREMENTMarketValuationAdjustmentsDetails FAIR VALUE MEASUREMENT - Market Valuation Adjustments (Details) Details 129 false false R130.htm 9955606 - Disclosure - FAIR VALUE MEASUREMENT - Items Measured at Fair Value on a Recurring Basis (Details) Sheet http://www.citigroup.com/role/FAIRVALUEMEASUREMENTItemsMeasuredatFairValueonaRecurringBasisDetails FAIR VALUE MEASUREMENT - Items Measured at Fair Value on a Recurring Basis (Details) Details 130 false false R131.htm 9955607 - Disclosure - FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward (Details) Sheet http://www.citigroup.com/role/FAIRVALUEMEASUREMENTLevel3FairValueRollforwardDetails FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward (Details) Details 131 false false R132.htm 9955608 - Disclosure - FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward - Narrative (Details) Sheet http://www.citigroup.com/role/FAIRVALUEMEASUREMENTLevel3FairValueRollforwardNarrativeDetails FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward - Narrative (Details) Details 132 false false R133.htm 9955609 - Disclosure - FAIR VALUE MEASUREMENT - Valuation Techniques and Inputs for Level 3 Fair Value Measurements (Details) Sheet http://www.citigroup.com/role/FAIRVALUEMEASUREMENTValuationTechniquesandInputsforLevel3FairValueMeasurementsDetails FAIR VALUE MEASUREMENT - Valuation Techniques and Inputs for Level 3 Fair Value Measurements (Details) Details 133 false false R134.htm 9955610 - Disclosure - FAIR VALUE MEASUREMENT - Items Measured at Fair Value on a Nonrecurring Basis (Details) Sheet http://www.citigroup.com/role/FAIRVALUEMEASUREMENTItemsMeasuredatFairValueonaNonrecurringBasisDetails FAIR VALUE MEASUREMENT - Items Measured at Fair Value on a Nonrecurring Basis (Details) Details 134 false false R135.htm 9955611 - Disclosure - FAIR VALUE MEASUREMENT - Valuation Techniques and Inputs for Level 3 Nonrecurring Fair Value Measurements (Details) Sheet http://www.citigroup.com/role/FAIRVALUEMEASUREMENTValuationTechniquesandInputsforLevel3NonrecurringFairValueMeasurementsDetails FAIR VALUE MEASUREMENT - Valuation Techniques and Inputs for Level 3 Nonrecurring Fair Value Measurements (Details) Details 135 false false R136.htm 9955612 - Disclosure - FAIR VALUE MEASUREMENT - Estimate Fair Value of Financial Instruments Not Carried at Fair Value (Details) Sheet http://www.citigroup.com/role/FAIRVALUEMEASUREMENTEstimateFairValueofFinancialInstrumentsNotCarriedatFairValueDetails FAIR VALUE MEASUREMENT - Estimate Fair Value of Financial Instruments Not Carried at Fair Value (Details) Details 136 false false R137.htm 9955613 - Disclosure - FAIR VALUE ELECTIONS - Changes in Fair Value Gains (Losses) (Details) Sheet http://www.citigroup.com/role/FAIRVALUEELECTIONSChangesinFairValueGainsLossesDetails FAIR VALUE ELECTIONS - Changes in Fair Value Gains (Losses) (Details) Details 137 false false R138.htm 9955614 - Disclosure - FAIR VALUE ELECTIONS - Valuation Adjustments, Fair Value Option for Financial Assets and Financial Liabilities (Details) Sheet http://www.citigroup.com/role/FAIRVALUEELECTIONSValuationAdjustmentsFairValueOptionforFinancialAssetsandFinancialLiabilitiesDetails FAIR VALUE ELECTIONS - Valuation Adjustments, Fair Value Option for Financial Assets and Financial Liabilities (Details) Details 138 false false R139.htm 9955615 - Disclosure - FAIR VALUE ELECTIONS - Certain Structured and Non-Structured Liabilities (Details) Sheet http://www.citigroup.com/role/FAIRVALUEELECTIONSCertainStructuredandNonStructuredLiabilitiesDetails FAIR VALUE ELECTIONS - Certain Structured and Non-Structured Liabilities (Details) Details 139 false false R140.htm 9955616 - Disclosure - GUARANTEES AND COMMITMENTS - Guarantees (Details) Sheet http://www.citigroup.com/role/GUARANTEESANDCOMMITMENTSGuaranteesDetails GUARANTEES AND COMMITMENTS - Guarantees (Details) Details 140 false false R141.htm 9955617 - Disclosure - GUARANTEES AND COMMITMENTS - Performance Risk (Details) Sheet http://www.citigroup.com/role/GUARANTEESANDCOMMITMENTSPerformanceRiskDetails GUARANTEES AND COMMITMENTS - Performance Risk (Details) Details 141 false false R142.htm 9955618 - Disclosure - GUARANTEES AND COMMITMENTS - Credit Commitments and Lines of Credit (Details) Sheet http://www.citigroup.com/role/GUARANTEESANDCOMMITMENTSCreditCommitmentsandLinesofCreditDetails GUARANTEES AND COMMITMENTS - Credit Commitments and Lines of Credit (Details) Details 142 false false R143.htm 9955619 - Disclosure - GUARANTEES AND COMMITMENTS - Restricted Cash (Details) Sheet http://www.citigroup.com/role/GUARANTEESANDCOMMITMENTSRestrictedCashDetails GUARANTEES AND COMMITMENTS - Restricted Cash (Details) Details 143 false false R144.htm 9955620 - Disclosure - LEASES (Details) Sheet http://www.citigroup.com/role/LEASESDetails LEASES (Details) Details http://www.citigroup.com/role/LEASESTables 144 false false R145.htm 9955621 - Disclosure - CONTINGENCIES (Details) Sheet http://www.citigroup.com/role/CONTINGENCIESDetails CONTINGENCIES (Details) Details http://www.citigroup.com/role/CONTINGENCIES 145 false false R146.htm 9955622 - Disclosure - SUBSIDIARY GUARANTEES - Summarized Income Statement (Details) Sheet http://www.citigroup.com/role/SUBSIDIARYGUARANTEESSummarizedIncomeStatementDetails SUBSIDIARY GUARANTEES - Summarized Income Statement (Details) Details 146 false false R147.htm 9955623 - Disclosure - SUBSIDIARY GUARANTEES - Summarized Balance Sheet (Details) Sheet http://www.citigroup.com/role/SUBSIDIARYGUARANTEESSummarizedBalanceSheetDetails SUBSIDIARY GUARANTEES - Summarized Balance Sheet (Details) Details 147 false false All Reports Book All Reports c-20260331.htm c-20260331_d2.htm c-20260331.xsd c-20260331_cal.xml c-20260331_def.xml c-20260331_lab.xml c-20260331_pre.xml c-20260331_g1.jpg c-20260331_g2.jpg c-20260331_g3.jpg c-20260331_g4.jpg c-20260331_g5.jpg c-20260331_g6.jpg c-20260331_g7.jpg c-20260331_g8.jpg http://fasb.org/srt/2025 http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true true