Proceeds from divestitures
Proceeds from Divestiture of Businesses
Balance, beginning of period, pretax
Balance, end of period, pretax
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax
Schedule of company contributions
Schedule of Actual and Expected Employer Contributions [Table Text Block]
Tabular disclosure of actual and estimated expected employer contributions for pension plans and/or other employee benefit plans.
Amortized cost and fair value of AFS debt securities
Debt Securities, Available-for-Sale [Table Text Block]
Nonrecurring fair value measurements included in earnings
Fair Value Measurement with Unobservable Inputs Reconciliation Non Recurring Basis Asset Gain (Loss) Included in Earnings
Amount of gain (loss) recognized in the income statement for an asset measured on a nonrecurring basis using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.
Commodity and other futures and forwards
Commodity and Other Futures and Forwards [Member]
Commodity and Other Futures and Forwards [Member]
Schedule of short-term borrowings
Schedule of Short-Term Debt [Table Text Block]
Commodity contracts
Commodity and other contracts (gross)
Commodity Contract [Member]
Expected return on assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Indefinite-lived Intangible Assets [Axis]
Indefinite-Lived Intangible Assets [Axis]
Entity File Number
Entity File Number
Commissions and fees
Commissions And Fees [Member]
Commissions And Fees [Member]
Other comprehensive income (loss), tax effect
Other Comprehensive Income (Loss), Tax
Other trading liabilities
Other Trading Liabilities [Member]
Other Trading Liabilities [Member]
Trading account derivatives
Trading assets
Securities (Assets) [Member]
Accounting Changes and Future Accounting Changes
New Accounting Pronouncements, Policy [Policy Text Block]
SOFR
Secured Overnight Financing Rate (SOFR) [Member]
Total amount outstanding
Maximum potential amount of future payments
Guarantor Obligations, Maximum Exposure, Undiscounted
Debt securities AFS
Debt Securities [Member]
Position [Axis]
Position [Axis]
Changes in intangible assets
Schedule of Changes in Intangible Assets [Table Text Block]
Schedule of changes in intangible assets.
Adjustment to Compensation:
Adjustment to Compensation [Axis]
Home equity loans in process of foreclosure, less than
Home Equity Loans in Process of Foreclosure, Amount
Home Equity Loans in Process of Foreclosure, Amount
Loans forgiven (less than)
Financing Receivable, Excluding Accrued Interest, Forgiven
Financing Receivable, Excluding Accrued Interest, Forgiven
Yield
Measurement Input, Yield [Member]
Measurement Input, Yield [Member]
Cash and deposits with banks
Disposal Group, Including Discontinued Operation, Cash
Held-to-maturity Securities, Debt Maturities
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Gross realized investment losses
Gross Realized Loss on Marketable Securities and Cost Method Investments Excluding Other than Temporary Impairments and Other Investments
Gross Realized Loss on Marketable Securities and Cost Method Investments Excluding Other than Temporary Impairments and Other Investments
Allowance
Disposal Group, Including Discontinued Operation, Financing Receivable Allowance
Disposal Group, Including Discontinued Operation, Financing Receivable Allowance
Securities borrowed or purchased under agreements to resell
Schedule of Resale Agreements [Table Text Block]
Gain (loss) from changes in fair value
Fair Value, Option, Changes in Fair Value, Gain (Loss)
Less: Netting of cash collateral paid
Netting of cash collateral paid
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset
Number of trusts to hold securitized credit card receivables
Securitization Trust, Number
Represents the number of securitization trusts established to hold in trust a specific type of securitized receivables.
Allowance for credit losses
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
After 1 but within 5 years, amortized cost
Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Pension plans
Pension Plan [Member]
Employee Stock Option
Share-Based Payment Arrangement, Option [Member]
Credit, Funding and Debt Valuation Adjustments Gain (Loss) [Abstract]
Credit, Funding and Debt Valuation Adjustments Gain (Loss) [Abstract]
Credit, Funding and Debt Valuation Adjustments Gain (Loss) [Abstract]
INTEREST INCOME AND EXPENSE
Interest Income and Interest Expense Disclosure [Text Block]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Principal transactions revenue
Principal Transaction Revenue [Line Items]
Common stock, authorized shares (in shares)
Common Stock, Shares Authorized
Card-related loan fees
Credit And Bank Card Income, Card-Related Loan Fees [Member]
Credit And Bank Card Income, Card-Related Loan Fees [Member]
Wealth
Wealth [Member]
Wealth
Assets Sold under Agreements to Repurchase
Assets Sold under Agreements to Repurchase [Line Items]
Schedule of fair value of loans and other disclosures for certain mortgage loans
Schedule of Fair Value of Loans and Other Disclosures for Certain Mortgage Loans [Table Text Block]
Represents the schedule of fair value of loans and other disclosures for certain mortgage loans.
Deposits
Disposal Group, Including Discontinued Operation, Deposits
Disposal Group, Including Discontinued Operation, Deposits
Noncontrolling interests
Add: Net income (loss) attributable to noncontrolling interests
Net income attributable to noncontrolling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Debt Instrument
Debt Instrument [Line Items]
Letters of credit provided to conduits
Letters of Credit Provided to Conduits
This element represents the letters of credit provided to conduits.
Internal Investment Grade
Internal Investment Grade [Member]
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Financing Receivable, Credit Quality Indicator [Table]
Financing Receivable, Credit Quality Indicator [Table]
Medium-Term Senior Notes, Series N, Floating Rate Notes Due October 6, 2028 of CGMHI
Medium-Term Senior Notes, Series N, Floating Rate Notes Due October 6, 2028 of CGMHI [Member]
Medium-Term Senior Notes, Series N, Floating Rate Notes Due October 6, 2028 of CGMHI
Retirement Benefits [Abstract]
Retirement Benefits [Abstract]
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Net carrying amount of Intangible assets (excluding MSRs)
Beginning balance
Ending balance
Intangible Assets, Excluding Mortgage Servicing Rights
Sum of the carrying amounts of all intangible assets, excluding goodwill and excluding mortgage servicing rights, as of the balance sheet date, net of accumulated amortization and impairment charges.
Series CC
Series CC Preferred Stock [Member]
Series CC Preferred Stock
Credit Derivative Maturity [Domain]
Credit Derivative Maturity [Domain]
Different maturity periods to credit derivatives of the entity.
Series HH
Series HH Preferred Stock [Member]
Series HH Preferred Stock
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Interest expense
Total interest expense
Interest Expense, Operating
Equity-IR correlation
Measurement Input, Equity Interest Rate Correlation [Member]
Measurement Input, Equity Interest Rate Correlation
Income from continuing operations—excluding noncontrolling interests
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Maximum length of time hedged in cash flow hedge
Maximum Length of Time Hedged in Cash Flow Hedge
Schedule of Financial Instruments Subject to Mandatory Redemption [Table]
Financial Instrument Subject to Mandatory Redemption [Table]
Award Timing Method
Award Timing Method [Text Block]
Commodity and other contracts
Commodity hedges
Commodity Option and Other Contract Options [Member]
Represents information in the aggregate for an option contract in which the underlying asset is a commodity and for other option contracts whose primary underlying risk is not otherwise detailed in this disclosure.
Recorded investment
Total non-accrual
Financing Receivable, Excluding Accrued Interest, Nonaccrual
Guarantees and Commitments [Abstract]
Guarantees and Commitments
Hedging Relationship [Domain]
Hedging Relationship [Domain]
CTA, net of hedges
Foreign currency translation adjustment (CTA)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Citigroup Inc.
Parent Company [Member]
Schedule of significant interests in unconsolidated VIEs - balance sheet classification
Schedule of Significant Interests in Unconsolidated Variable Interest Entities [Table Text Block]
This element represents the schedule of carrying amounts and classifications of significant interests in unconsolidated VIEs.
Trading Symbol
Trading Symbol
Securities loaned
Net amounts of liabilities included on the Consolidated Balance Sheet
Deposits Received for Securities Loaned, at Carrying Value
Loans sold and/or reclassified to held-for-sale
Financing Receivable, Sale and Reclassification to Held-for-Sale
Other customer relationships
Other Customer Relationships [Member]
The intangible asset representing the value of the entity's customer relationships, not otherwise defined.
Interest exempt from U.S. federal income tax
Interest Income, Securities, Operating, Tax Exempt
Estimated fair value of financial instruments
Schedule of Fair Value of Financial Instruments [Table Text Block]
Tabular disclosure of the carrying value and fair value of financial instruments which are not carried at fair value.
Effect of exchange rate changes on cash, due from banks and deposits with banks
Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Client intermediation
Client Intermediation [Member]
This element represents a range of transactions (including credit-linked and equity-linked notes) designed to provide specified returns based on the underlying security, referenced asset or index to the investors.
Carrying value and fair value of debt securities HTM
Debt Securities, Held-to-Maturity [Table Text Block]
Non-marketable equity securities carried at fair value
Equity Securities, Carried At Fair Value, Nonmarketable
Equity Securities, Carried At Fair Value, Nonmarketable
Less: Cash collateral paid
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Purchases, liability
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases
Carrying value of non-marketable equity securities measured using the measurement alternative
Equity Securities without Readily Determinable Fair Value [Table Text Block]
Series Z
Series Z Preferred Stock [Member]
Series Z Preferred Stock
Sales or transfers of various consumer loan portfolios to HFS
ACLL
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Income allocated to employees with no rights to dividends
Income Allocated To Employee Restricted And Deferred Shares That Contain No Rights To Dividends
Income Allocated To Employee Restricted And Deferred Shares That Contain No Rights To Dividends
Gross unrealized losses
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss
Class of Financing Receivable [Domain]
Class of Financing Receivable [Domain]
Company contributions (reimbursements)
Defined Benefit Plan, Plan Assets, Contributions by (Reimbursements to) Employer
Defined Benefit Plan, Plan Assets, Contributions by (Reimbursements to) Employer
90 days past due and accruing
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member]
Carrying value
Guarantor Obligations, Current Carrying Value
Equity linked
Equity Linked [Member]
Represents information pertaining to equity linked of certain structured liability.
Provision for income taxes
Provision (benefits) for income taxes
Tax effect
Income Tax Expense (Benefit)
Loans held-for-sale
Mortgage loans HFS
Loan Held for Sale [Member]
Represents loans held-for-sale.
Greater than 80% but less than or equal to 100%
Debt-to-Value Ratio, 80 to 100 Percent [Member]
Preferred stock, issued shares, at aggregate liquidation value (in shares)
Preferred Stock, Shares Issued
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Due within 1 year, fair value
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One
Held for sale
Discontinued Operations, Held-for-Sale [Member]
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Guarantor Obligations [Table]
Guarantor Obligation [Table]
Other Income and Expenses [Abstract]
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]
Net impairment losses on investments recognized in earnings
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Equity Method Investment, Other than Temporary Impairment And Investment Impairment, Measurement Alternative
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Equity Method Investment, Other than Temporary Impairment And Investment Impairment, Measurement Alternative
All Trading Arrangements
All Trading Arrangements [Member]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Other
Collateralized Mortgage-Backed Securities, Other [Member]
Collateralized Mortgage-Backed Securities, Other
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Gross impairment losses
Impairment of Investments and Equity Method Investment Other than Temporary Impairment
The aggregate amount (i) by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income; and (ii) of an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting.
Commodity volatility
Measurement Input, Commodity Volatility [Member]
Measurement Input, Commodity Volatility
Credit card lines
Credit Card Lines of Credit [Member]
Represents the credit provided to customers by issuing credit cards. The credit card lines are unconditionally cancellable by the issuer.
Sales, assets
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share
PEO Total Compensation Amount
PEO Total Compensation Amount
Trading derivatives, liability
Derivative Liability, Subject to Master Netting Arrangement, before Offset
Repurchase Agreements and Similar Transactions, Maturity Periods [Axis]
Repurchase Agreements and Similar Transactions, Maturity Periods [Axis]
Transactional and product servicing
Transactional And Product Servicing
Transactional And Product Servicing
Trading account assets
Trading Accounts Assets [Member]
Primary financial statement caption encompassing trading account assets.
Significant unconsolidated VIE assets
Total
unconsolidated
VIE assets
Variable Interest Entity Nonconsolidated Involvement Assets
The amount of involvement with significant unconsolidated Variable Interest Entity assets.
Number of reportable segments
Number of Reportable Segments
AOCI Attributable to Noncontrolling Interest
AOCI Attributable to Noncontrolling Interest [Member]
Policyholder benefits and claims
Policyholder Benefits and Claims Incurred, Net
Entity Address, State or Province
Entity Address, State or Province
Interest income
Total interest income
Interest and Dividend Income, Operating
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Antidilutive Security, Excluded EPS Calculation [Table]
Common dividends
Dividends, Common Stock
Loans at fair value
Held at fair value
Loans
Loans Receivable, Fair Value Disclosure
Individual:
Individual [Axis]
Entities [Table]
Entities [Table]
Measurement alternative—downward changes for observable prices
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount
Deposit Liability [Table]
Deposit Liability [Table]
Maximum exposure to loss in significant unconsolidated VIEs
Maximum
exposure to
unconsolidated VIEs
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount
Maximum exposure to loss in significant unconsolidated VIEs
Variable Interest Maximum Exposure to Loss [Abstract]
Greater than 100%
Debt-to-Value Ratio, LTV Greater than 100 percent [Member]
Debt-to-Value Ratio, LTV Greater than 100 percent [Member]
Entity Interactive Data Current
Entity Interactive Data Current
Amortization of unrecognized:
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment [Abstract]
Condensed Income Statement [Table]
Condensed Income Statement [Table]
Interest income
Interest and Dividend Income, Operating [Abstract]
Federal funds sold and securities borrowed and purchased under agreements to resell
Securities borrowed and purchased under agreements to resell
Securities borrowed and purchased under agreements to resell
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure
Deposits
Interest Expense, Deposits
ALLOWANCE FOR CREDIT LOSSES
Allowance for Credit Losses [Text Block]
Investment Banking
Investment Banking [Member]
Represents investment banking services. Fees and commissions from these services earned from advisory and equity and debt underwriting services.
Total involvement with SPE assets
Variable Interest Entity, Consolidated And Nonconsolidated Entities, Assets
The amount of total involvement with Special Purpose Entity assets, including significant unconsolidated Variable Interest Entity assets and consolidated Variable Interest Entity and Special Purpose Entity assets.
Personal loan
Personal Loan [Member]
Personal Loan [Member]
Change in securities loaned and sold under agreements to repurchase
Increase (Decrease) in Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Net
Physical commodities inventories
Hedged Asset, Fair Value Hedge, Physical Commodities Inventory
Hedged Asset, Fair Value Hedge, Physical Commodities Inventory
Entity Central Index Key
Entity Central Index Key
PEO Name
PEO Name
Total revenues, net of interest expense
Total revenues, net of interest expense
Revenues
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
Investments:
Investments, Excluding Trading [Abstract]
Investments, Excluding Trading [Abstract]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Total liabilities, Netting
Liabilities Derivative Liability Fair Value Gross Asset Right to Reclaim Cash Offset and Securities Sold under Agreements to Repurchase Asset
Represents the aggregate of fair value of asset associated with financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset; right to receive cash collateral under master netting arrangements; and amount of asset associated with funds outstanding borrowed in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price.
Total trading derivatives, netting
Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset
Cash proceeds received for assets derecognized
Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount
Exercise Price
Award Exercise Price
Class of Stock [Domain]
Class of Stock [Domain]
Balance of non-accrual loans or loans more than 90 days past due
Fair Value Option Loans Held as Assets Nonaccrual Status or 90 Days or More Past Due
This item represents the aggregate fair value of loans held as assets for which the fair value option has been elected that are in nonaccrual status, if the entity's policy is to recognize interest income separately from other changes in fair value, or that are 90 days or more past due.
Non-Bank Subsidiaries
Non-Bank Subsidiaries [Member]
Non-Bank Subsidiaries
Disposal Group, Including Discontinued Operation, Consideration
Disposal Group, Including Discontinued Operation, Consideration
Fair Value Option, Disclosures [Table]
Fair Value Option, Disclosures [Table]
Corporate loans, net of unearned income
Financing Receivable, before Allowance for Credit Loss
Debt-to-Value [Domain]
Debt-to-Value [Domain]
Total amounts reclassified out of AOCI, pretax
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member]
Bank
Bank Entities [Member]
Represents the "Significant Citibank Entities" Citibank, N.A. units domiciled in the U.S., Western Europe, Hong Kong and Singapore as well as other Citibank and Banamex entities.
Income from Fees and Commission [Table]
Income from Fees and Commission [Table]
Encapsulates the table having details of income from fees and commissions.
Revolving loans converted to term loans
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff
Internal Credit Assessment [Axis]
Internal Credit Assessment [Axis]
Subordinated interests
Mortgage Backed Securities with Subordinated Interests Issued by Private Enterprises [Member]
Represents debt securities with subordinated interest collateralized by real estate mortgage loans (mortgages), issued by non-governmental sponsored enterprises.
DERIVATIVES
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Prior service cost (benefit)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fair Value as of Grant Date
Award Grant Date Fair Value
Four years prior to current fiscal year
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year
Total adjustments
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity
IR basis
Measurement Input, Interest Rate Basis [Member]
Measurement Input, Interest Rate Basis
Document Quarterly Report
Document Quarterly Report
Loans
Loan Held for Investment Impaired [Member]
Represents loans held for investment whose carrying amount is based on the fair value of the underlying collateral, including primarily real-estate secured loans.
Less than 12 months
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months
Long-term debt
Long-term debt
Long-Term Debt, Fair Value
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Schedule of loan delinquency and non-accrual details by type
Financing Receivable, Nonaccrual [Table Text Block]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information Disclosure [Abstract]
Other revenue
Other Income [Member]
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Commodity linked
Commodity Linked [Member]
Represents information pertaining to commodity linked of certain structured liability.
Other derivative instruments, Trading derivatives
Not Designated as Hedging Instrument, Trading [Member]
Series X
Series X Preferred Stock [Member]
Series X Preferred Stock
Investment Type [Axis]
Investment Type [Axis]
Non-PEO NEO
Non-PEO NEO [Member]
Contractual servicing fees received
Cash Flows Between Transferor and Transferee, Servicing Fees
Position [Domain]
Position [Domain]
Dividend rate (as a percent)
Preferred Stock, Dividend Rate, Percentage
Gross unrealized gains
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax
Securities loaned or sold under agreements to repurchase
Schedule of Repurchase Agreements [Table Text Block]
Prior service cost (benefit)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Amount of gain (loss) recognized in AOCI on derivative
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax
Greater than 90 days
Maturity Greater than 90 Days [Member]
Other, net
Other Noncash Income (Expense)
Defined Benefit Plan Disclosure
Defined Benefit Plan Disclosure [Line Items]
Compensation Amount
Outstanding Recovery Compensation Amount
Securities loaned and sold under agreements to repurchase
Interest Expense, Federal Funds Purchased and Securities Sold under Agreements to Repurchase
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Fair value
Estimated fair value
Estimate of Fair Value Measurement [Member]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Fair Value Option Quantitative Disclosures
Fair Value, Option, Quantitative Disclosures [Line Items]
Funded Exposure
Funded Exposure [Abstract]
Total other assets
Assets Other [Member]
This element represents other assets not otherwise disclosed separately.
Total
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement
Revenues
Revenues [Abstract]
Foreign exchange contract options
Foreign Exchange Option [Member]
Unearned income
Unearned income
Financing Receivable, Deferred Commitment Fee
Amortized cost, after 5 but within 10 years
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10
Hedged Liability, Statement of Financial Position [Extensible Enumeration]
Hedged Liability, Statement of Financial Position [Extensible Enumeration]
Retirement Plan Sponsor Location [Domain]
Retirement Plan Sponsor Location [Domain]
Financial Instruments [Domain]
Financial Instruments [Domain]
After 10 years, fair value
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10
Other (including investment funds, airlines and shipping)
Airplanes Ships and Other Assets [Member]
This element represents airplanes, ships and other assets.
Components of intangible assets, indefinite-lived
Schedule of Indefinite-Lived Intangible Assets [Table Text Block]
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Purchases of previously transferred financial assets
Cash Flows Between Transferor and Transferee, Purchases of Previously Transferred Financial Assets
Net amounts of liabilities included on the Consolidated Balance Sheet
Carrying Value of Securities Sold under Repurchase Agreements and Deposits Received for Securities Loaned
Other assets
Disposal Group, Including Discontinued Operation, Other Assets
Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
DEBT
Debt Disclosure [Text Block]
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Other
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings Or Other Comprehensive Income (Loss)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings Or Other Comprehensive Income (Loss)
Total assets
Assets [Member]
Other comprehensive income (loss), pretax
Other Comprehensive Income (Loss), before Tax
Net income allocated to common shareholders for diluted EPS
Net Income (Loss) Available to Common Stockholders, Diluted
Finite and Indefinite-lived Intangible Assets
Finite and Indefinite-lived Intangible Assets [Roll Forward]
Collateral [Domain]
Collateral Held [Domain]
CONTINGENCIES
Commitments and Contingencies Disclosure [Text Block]
Adjusted weighted-average diluted common shares outstanding (in shares)
Adjusted weighted-average common shares outstanding applicable to diluted EPS (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Series II
Series II Preferred Stock [Member]
Series II Preferred Stock
Derivative [Table]
Derivative [Table]
Entity Small Business
Entity Small Business
ROU asset location
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Fair value, after 1 but within 5 years
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five
Reportable legal entities
Reportable Legal Entities [Member]
Long-term debt
Long-Term Debt [Member]
Gain (loss) recognized in AOCI
Other Comprehensive Income (Loss), before Reclassifications, before Tax
Senior interests
Mortgage Backed Securities with Senior Interests Issued by Private Enterprises [Member]
Represents debt securities with senior interest collateralized by real estate mortgage loans (mortgages), issued by non-governmental sponsored enterprises.
Document Period End Date
Document Period End Date
Purchased credit deteriorated
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Losses, Purchased Credit-Deteriorated
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Losses, Purchased Credit-Deteriorated
Gross and net repurchase agreements and securities lending agreements and the related offsetting amount permitted under ASC 210-20-45
Offsetting Liabilities [Abstract]
Fair value of derivative in liability position
Derivative, Net Liability Position, Aggregate Fair Value
Unrealized gains (losses) still held
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Change in Unrealized Gain (Loss)
Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3).
Total net receivables
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Total equity
Balance, beginning of period
Balance, end of period
Stockholders’ equity
Equity, Including Portion Attributable to Noncontrolling Interest
EARNINGS PER SHARE
Earnings Per Share [Text Block]
Name
Outstanding Recovery, Individual Name
Additional paid-in capital
Additional Paid in Capital
Product and Service [Axis]
Product and Service [Axis]
Unsettled repurchase and securities lending agreements
Securities Sold under Agreements to Resell Securities Loaned Gross, Unsettled
Securities Sold under Agreements to Resell Securities Loaned Gross, Unsettled
Securities purchased under agreements to resell
Offsetting Securities Purchased under Agreements to Resell [Abstract]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Prior year
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff
Funding Commitments for Significant Unconsolidated VIEs
Variable Interest Entity Funding Commitments [Line Items]
LTV not available
LTV Not Available [Member]
LTV Not Available
Loans
Loans Receivables whose Carrying Amount Based on Fair Value of Collateral Fair Value Disclosure
This element represents fair value of loans held for investment whose carrying amount is based on the fair value of the underlying collateral, including primarily real-estate secured loans.
Disposal Group Name [Axis]
Disposal Group Name [Axis]
Securities loaned or sold under agreements to repurchase and other trading liabilities
Securities Loaned Or Sold Under Agreements To Repurchase And Other Trading Liabilities, Fair Value Disclosure
Securities Loaned Or Sold Under Agreements To Repurchase And Other Trading Liabilities, Fair Value Disclosure
Total MSR fees
Fees and Commissions, Mortgage Banking and Servicing
Citigroup’s total other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Combination: interest rate reduction and term extension
Extended Maturity and Interest Rate Reduction [Member]
Securities loaned or sold under agreements to repurchase and other trading liabilities, measurement
Securities Loaned Or Sold Under Agreements To Repurchase And Other Trading Liabilities, Measurement Input
Securities Loaned Or Sold Under Agreements To Repurchase And Other Trading Liabilities, Measurement Input
Non-trading derivatives and other financial liabilities measured on a recurring basis, gross
Other financial liabilities
Other Liabilities, Fair Value Disclosure
Level 1
Fair Value, Inputs, Level 1 [Member]
Less than 660
FICO Score, Less than 660 [Member]
FICO Score, Less than 680 [Member]
Federal Reserve Bank Stock
Federal Reserve Bank Stock [Member]
Federal Reserve Bank Stock
Net income (in dollars per share)
Earnings Per Share, Diluted
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Total modifications balance
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount
Weighted average life of commercial paper issued by conduits
Weighted Average Life of Commercial Paper Issued by Conduits
This element represents the weighted average life, in days, of commercial paper issued by the conduits.
Increase in allowance
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease)
Treasury stock (in shares)
Treasury Stock, Common, Shares
Deposits received for securities loaned
Securities Loaned [Abstract]
Investments, Debt and Equity Securities [Abstract]
Investments, Debt and Equity Securities [Abstract]
Net amounts
Securities Purchased Under Agreements to Resell Securities Borrowed Amount Offset Against Collateral
Amount of securities purchased under agreements to resell and securities borrowed offset against an obligation to return collateral under a master netting arrangement. Includes assets not subject to a master netting arrangement and not elected to be offset.
Forward price
Measurement Input, Forward Price [Member]
Measurement Input, Forward Price [Member]
Financing Receivable Portfolio Segment [Axis]
Financing Receivable Portfolio Segment [Axis]
Other
Stockholders' Equity, Other
Schedule of key characteristics of credit derivative portfolio
Disclosure of Credit Derivatives [Table Text Block]
Over-the-counter
Over-the-Counter [Member]
Maximum potential amount of future payments
Guarantee Obligations Maximum Exposure [Abstract]
Loans sold with recourse
Loans Sold with Recourse [Member]
Represents the entity's obligations to reimburse the buyers for loan losses under certain circumstances. Recourse refers to the clause in a sales agreement under which a lender will fully reimburse the buyer/investor for any losses resulting from the purchased loans. This may be accomplished by the seller's taking back any loans that become delinquent.
Derivative assets
Derivative Asset, Measurement Input
Loans, net of unearned income
Loans, net of unearned income, at fair value
Loans, net of unearned income
Total loans, net of unearned income
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss
Distributions paid to NCI
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders
Securities sold under agreements to repurchase
Net amounts of liabilities included on the Consolidated Balance Sheet
Securities Sold under Agreements to Repurchase
Fair value of securities in unrealized loss position
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]
Expiration Date
Trading Arrangement Expiration Date
Other Commitments [Domain]
Other Commitments [Domain]
Foreign government securities
Foreign government
Debt Security, Government, Non-US [Member]
Unrealized gains and losses on AFS debt securities
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent
Investments
Investments [Member]
Aggregate cash obligations and collateral requirements
Credit Derivative Aggregate Cash Obligations and Collateral Requirements
The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features and a portion amount of the collateral which previously received from existing derivative counterparties would be required to segregate with third party custodians if the credit-risk-related contingent features were triggered at the end of the reporting period.
Investments in subsidiaries
Investments in Subsidiaries
Represents the investments in subsidiaries of the reporting entity.
Amortized cost, due within 1 year
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One
HTM debt securities, net of allowance(1)
Held-to-maturity and Other Securities Carried at Cost, Fair Value Disclosure
Held-to-maturity and Other Securities Carried at Cost, Fair Value Disclosure
Transaction [Domain]
Transaction [Domain]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
Executive Category:
Executive Category [Axis]
12 months or longer
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Issuance of long-term debt
Proceeds from Issuance of Long-Term Debt
Markets
Markets [Member]
Markets
Less than 12 months
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Transfers in (out)
Goodwill, Transfers
Other operating
Other Noninterest Expense
Other Noninterest Expense
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
US Treasury (UST) Interest Rate
US Treasury (UST) Interest Rate [Member]
Interest rate risks
Interest rate contracts
Interest rate contracts (gross)
Interest Rate Contract [Member]
Total
Offsetting Securities Sold Under Repurchase Agreements and Deposits Received for Securities Loaned [Abstract]
Proceeds from new securitizations
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers
Foreign exchange futures, forwards and spot
Foreign Exchange Future, Forward and Spot [Member]
Foreign Exchange Future, Forward and Spot [Member]
30–89 days past due
Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivables, 30 to 89 Days Past Due [Member]
Series GG
Series GG Preferred Stock [Member]
Series GG Preferred Stock
Items measured at fair value on a recurring basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Series BB
Series BB Preferred Stock [Member]
Series BB Preferred Stock
Antidilutive securities excluded from computation (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
GUARANTEES AND COMMITMENTS
Guarantees, Leases And Commitments [Text Block]
Guarantees, Leases And Commitments [Text Block]
Guarantee fees
Guarantee Fees [Member]
Guarantee Fees [Member]
Schedule of funding commitments of unconsolidated Variable Interest Entities
Schedule of Funding Commitments of Unconsolidated Variable Interest Entities [Table Text Block]
This element represents the schedule of funding commitments of unconsolidated Variable Interest Entities.
LEASES
Lessee, Operating Leases [Text Block]
Total liabilities, Gross
Liabilities before Effects of Master Netting Arrangements
This element represents the aggregate of the liabilities reported on the balance sheet at period end, presented on a gross basis even when derivatives and other financial liabilities are subject to master netting arrangements and qualify for net presentation in the statement of financial position.
Increase in credit loss
Off-Balance-Sheet, Increase (Decrease) In Credit Loss, Liability
Off-Balance-Sheet, Increase (Decrease) In Credit Loss, Liability
Measure:
Measure [Axis]
Excluded component of fair value hedges
Excluded component of fair value hedges
AOCI, Derivative Qualifying as Hedge, Excluded Component, Parent [Member]
Disposal Group Classification [Domain]
Disposal Group Classification [Domain]
Loans
Loans, Fair Value Disclosure
Loans, Fair Value Disclosure
Non-compensation expense
Operating Expense, Excluding Compensation Expense
Operating Expense, Excluding Compensation Expense
Consumer loans
Consumer loans
Consumer Portfolio Segment [Member]
FX volatility
Measurement Input, Foreign Exchange Volatility [Member]
Measurement Input, Foreign Exchange Volatility [Member]
Summary of amounts reclassified out of accumulated other comprehensive income (loss) into the consolidated statement of income
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Percentage of loans rated investment grade
Financing Receivable, Internal Risk Rating
Financing Receivable, Internal Risk Rating
Equity contract options
Equity Option [Member]
Debt Securities Portfolio Layer Method
Debt Securities Portfolio Layer Method [Member]
Debt Securities Portfolio Layer Method
Schedule of Impaired Financing Receivable [Table]
Schedule of Impaired Financing Receivable [Table]
Non-marketable securities measured using measurement alternative
Non-Marketable Securities Measured Using Measurement Alternative [Member]
Non-Marketable Securities Measured Using Measurement Alternative [Member]
Common stock and additional paid-in capital (APIC)
Common Stock Including Additional Paid in Capital [Member]
Schedule of carrying value of retained interests
Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table Text Block]
Securitizations and Variable Interest Entities [Abstract]
Securitizations and Variable Interest Entities [Abstract]
Securitizations and Variable Interest Entities [Abstract]
Written
Sold
Short [Member]
Common stock, issued shares (in shares)
Common Stock, Shares, Issued
Upfront points
Measurement Input, Upfront Points [Member]
Measurement Input, Upfront Points [Member]
Liability FVA
Derivative Funding Valuation Adjustment, Gain (Loss) on Derivative Liability
Derivative Funding Valuation Adjustment, Gain (Loss) on Derivative Liability
Total Shareholder Return Amount
Total Shareholder Return Amount
Total other assets and cash collateral, gross
Other Assets before Effects of Master Netting Arrangements and Derivative Collateral Right to Reclaim Cash, Net
Represents the aggregate of assets categorized as other which are not in and of themselves material enough to require separate disclosure, presented on a gross basis even derivatives and other financial instruments are subject to master netting arrangements and qualify for net presentation in the statement of financial position, and the amount of the right to reclaim cash collateral net of the amount offset against net derivative instrument positions under master netting arrangements.
Securities sold under agreements to repurchase
Offsetting Securities Sold under Agreements to Repurchase [Abstract]
Net pretax change in cash flow hedges included within AOCI
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Parent
Short-term borrowings and long-term debt
Debt Instrument, Measurement Input
Investments, including dividends
Total interest and dividend income on investments
Interest and Dividend Income Securities Excluding Trading Securities
Interest and dividend income on all securities excluding trading securities.
Security Exchange Name
Security Exchange Name
LOANS
Financing Receivables [Text Block]
Asset Class [Domain]
Asset Class [Domain]
Net realized/unrealized gains (losses) included in principal transactions
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings
Statement [Line Items]
Statement [Line Items]
Debt securities AFS, carrying amount of hedged asset/liability
Hedged Asset, Fair Value Hedge
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset
Trading derivative, asset, gross net cash collateral paid
Derivative Fair Value of Derivative Asset and Derivative Collateral Right to Reclaim Cash, Net
Represents the aggregate of the fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position, and the amount of the right to reclaim cash collateral net of the amount offset against net derivative instrument positions under master netting arrangements.
Unfunded lending commitments
Unused Commitments to Extend Credit
Mortgage servicing rights (MSRs)
Mortgage Servicing Rights M S R
The amount of mortgage servicing rights (MSRs) as of the balance sheet date.
Common Stock, par value $.01 per share
Common Stock [Member]
Issuance, liability
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances
Unfunded Exposure
Unfunded Exposure [Abstract]
Other borrowings
Other Short-Term Borrowings
Commercial and industrial
Commercial and Industrial [Member]
Represents the commercial and industrial loan.
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Underlying Asset Class [Axis]
Underlying Asset Class [Axis]
Non-U.S. plans
Foreign Plan [Member]
Interest in entity sold
Disposal Group, Interest In Entity Sold
Disposal Group, Interest In Entity Sold
Counterparty CVA
Counterparty Derivative Credit Risk Valuation Adjustment, Gain (Loss)
Counterparty Derivative Credit Risk Valuation Adjustment, Gain (Loss)
Trial modifications, amount
Financing Receivable, Modified in Period, Trial Modifications, Amount
Financing Receivable, Modified in Period, Trial Modifications, Amount
Interest rate swaps
Interest Rate Swap [Member]
Equity in undistributed income of subsidiaries
Income (Loss) from Equity Method Investments
Basic earnings per share
Earnings Per Share, Basic [Abstract]
Deposits with banks, net of allowance
Deposits with Banks and Other Financial Institutions, Net of Allowance
Deposits with Banks and Other Financial Institutions, Net of Allowance
Loan to value ratio
Financing Receivable, Loan-To-Value Ratio
Financing Receivable, Loan-To-Value Ratio
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Table]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure [Abstract]
Fair Value, Option, Aggregate Differences [Abstract]
Fair Value, Option, Aggregate Differences [Abstract]
Additional collateral to be posted
Additional Collateral, Aggregate Fair Value
Other assets, gross
Other Assets before Effects of Master Netting Arrangements
This element represents the fair value of assets categorized as other which are not in and of themselves material enough to require separate disclosure, presented on a gross basis even when derivatives and other financial assets are subject to master netting arrangements and qualify for net presentation in the statement of financial position.
Citigroup’s total other comprehensive income (loss)
Total other comprehensive income
Other Comprehensive Income (Loss), Net of Tax
Information regarding the Company's operations by segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Short-term borrowings (including $26,719 and $21,567 as of March 31, 2026 and December 31, 2025, respectively, at fair value)
Short-term borrowings, at fair value
Total short-term borrowings
Short-term borrowings
Short-Term Debt
Measurement Input Type [Domain]
Measurement Input Type [Domain]
Banamex
Banamex [Member]
Banamex
Schedule of commissions, fees, administration and other fiduciary fees revenue
Schedule of Commission and Fee Revenue [Table Text Block]
Schedule of commission and fee revenues earned by the entity.
Non-investment grade, non-accrual
External Credit Rating, Non Investment Grade, Non-accrual [Member]
External Credit Rating, Non Investment Grade, Non-accrual [Member]
Technology/communication
Communications and Information Technology
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default
Securities Purchased under Agreements to Resell Securities Borrowed Collateral Obligation to Return Securities
Amount of obligation to return securities collateral under master netting arrangements that have not been offset against securities purchased under agreements to resell and securities borrowed.
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
Consolidated VIEs
Variable Interest Entity, Primary Beneficiary [Member]
Taxable interest
Interest Income, Securities, Operating, Taxable
Accrued interest receivable
Financing Receivable, Accrued Interest, after Allowance for Credit Loss
Total liabilities and equity
Liabilities and Equity
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Benefit plans
Benefit plan adjustments
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments, Gain (Loss) [Table]
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Less: Non-cash collateral received
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Gross amounts offset on the Consolidated Balance Sheet
Federal funds purchased and securities loaned and sold under agreements to repurchase, Netting
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Asset Offset
Financial institutions
Loans to Financial Institutions [Member]
Represents financing receivables from financial institutions.
Lease financing
Lease financing
Lease Financing [Member]
Represents financing receivables classified as lease financing.
Income from continuing operations
Income (loss) from continuing operations
Income from continuing operations before attribution of noncontrolling interests
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Current fiscal year
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year
Pay vs Performance Disclosure [Line Items]
Currency translation adjustment (CTA), net of hedges
Currency translation adjustment (CTA), net of hedges
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Schedule of Variable Interest Entities [Table]
Variable Interest Entity [Table]
Two years prior to current fiscal year
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year
Prior
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff
Citigroup’s total comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Gross recoveries
Financing Receivable, Other Assets, Allowance For Credit Losses, Recovery
Financing Receivable, Other Assets, Allowance For Credit Losses, Recovery
Name
Measure Name
Issuance, assets
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances
Change in deposits
Increase (Decrease) in Deposits
Sales
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales
Principal transactions
Principal transactions revenue
Principal Transactions Revenue, Net
Class of Stock [Line Items]
Class of Stock [Line Items]
Amoritzed cost
Available-for-Sale Securities, Debt Maturities [Abstract]
Long-term debt (including $135,058 and $130,726 as of March 31, 2026 and December 31, 2025, respectively, at fair value)
Long-term debt, at fair value
Long-term debt
Long-Term Debt
Total assets
Identifiable assets
Consolidated VIE/SPE assets
Assets
Cash flows from investing activities of continuing operations
Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract]
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Summary of preferred stock outstanding
Schedule of Preferred Stock [Table Text Block]
Tabular disclosure of preferred stock, including but not limited to dividend rate, redemption price etc.
Geographical [Domain]
Geographical [Domain]
Fair values, payable
Credit Risk Derivative Liabilities, at Fair Value
Add back: Dividends allocated to employee restricted and deferred shares with rights to dividends that are forfeitable
Dividends Allocated to Employee Restricted And Deferred Shares That Contain Forfeitable Rights to Dividends
Dividends Allocated to Employee Restricted And Deferred Shares That Contain Forfeitable Rights to Dividends
Schedule of fees received on servicing previously securitized mortgages
Schedule of Fees Received on Mortgage Servicing Rights [Table Text Block]
This element represents the schedule of fees received on servicing previously securitized mortgages.
Derivative instruments considered to be guarantees
Derivative Instruments Considered Guarantees [Member]
Represents only those derivative instruments that require the entity to make payments to the counterparty based on changes in an underlying that is related to an asset, a liability, or an equity security held by the guaranteed party. More specifically, derivative instruments considered to be guarantees include certain over-the-counter written put options where the counterparty is not a bank, hedge fund or broker-dealer (such counterparties are considered to be dealers in these markets, and may therefore not hold the underlying instruments).
Private equity
Private Equity Funds [Member]
Retained by Citigroup via non-certificated interests
Portion of Securitized Assets and Any Other Financial Assets Managed Together Retained by Reporting Entity Via Non Certificated Interests
This element represents the ownership interests in principal amount of trust credit card receivables retained by the reporting entity via non-certificated interests.
Held-to-maturity debt securities, fair value
Fair value
Fair value
Debt Securities, Held-to-Maturity, Fair Value
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
After 5 but within 10 years, fair value
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10
Brokerage payables (including $6,219 and $5,492 as of March 31, 2026 and December 31, 2025, respectively, at fair value)
Brokerage payables, at fair value
Brokerage Payables
Amount due to customer, broker-dealers, and clearing organizations related to the entity's brokerage activities and operations. The amount due to broker-dealers and clearing organizations may include amounts payable for securities failed to receive, certain deposits received for securities loaned, amounts payable to clearing organizations on open transactions, and floor-brokerage payables. In addition, the net receivable or payable arising from unsettled trades would be reflected in those captions. A broker-dealer that purchases securities, either for its own account or for a customer's account, but does not receive the securities on the settlement date records the amount of money representing the purchase price of the securities, including any accrued interest, as a liability to the selling broker-dealer. This liability is paid when the securities are received by the purchasing broker-dealer.
Equity-Equity correlation
Measurement Input, Equity - Equity Correlation [Member]
Measurement Input, Equity - Equity Correlation
Related Party
Related Party [Member]
Administration and other fiduciary fees
Total administration and other fiduciary fees
Administration And Other Fiduciary Fees
Administration And Other Fiduciary Fees
PEO
PEO [Member]
Transfers into Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3
Amortized cost and fair value of debt securities by contractual maturity dates
Investments Classified by Contractual Maturity Date [Table Text Block]
7.625% Trust Preferred Securities of Citigroup Capital III (and registrant’s guaranty with respect thereto)
Seven Point Six Two Five Percent Trust Preferred Securities Of Citigroup Capital III [Member]
Seven Point Six Two Five Percent Trust Preferred Securities Of Citigroup Capital III [Member]
Deposit-related fees
Deposit-Related Fees [Member]
Deposit-Related Fees [Member]
U.S. plans
UNITED STATES
U.S.
UNITED STATES
Municipal investments
Municipal Investments [Member]
This element represents municipal investments.
Allowance for credit losses on other assets at beginning of quarter(2)
Allowance for credit losses on other assets at end of quarter
Financing Receivable, Other Assets, Allowance for Credit Loss
Financing Receivable, Other Assets, Allowance for Credit Loss
Retained earnings
Retained Earnings [Member]
Cash, due from banks and deposits with banks at beginning of period
Cash, due from banks and deposits with banks at end of period
Cash, due from banks and deposits with banks at end of period
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Total trading account derivatives, assets
Trading derivatives
Derivative assets
Derivative Asset
12 months or longer
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer
Interest and Fee Income [Table]
Interest and Fee Income [Table]
Interest and Fee Income [Table]
Performance guarantees
Performance Guarantee [Member]
Nonrecurring
Fair Value, Nonrecurring [Member]
Interest rate contract options
Interest Rate Option [Member]
An option contract giving the holder to buy (for a call) or sell (for a put) a security with a certain interest rate at a given strike price on or before the expiration date.
Net amounts
Security Borrowed, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives
Variable Interest Entity Guarantees and Derivatives Unfunded Maximum Exposure to Loss
This element represents the maximum unfunded exposure to loss in a significant unconsolidated variable interest entity, related to guarantees and derivatives.
Insurance premiums
Insurance Premiums [Member]
Insurance Premiums [Member]
Intangible assets (including MSRs of $766 and $759 as of March 31, 2026 and December 31, 2025, respectively)
Intangible Assets, Net (Excluding Goodwill)
Available-for-sale (AFS) debt securities
AFS debt securities
Fair value
Debt Securities, Available-for-Sale [Abstract]
Transfers out of Level 3, liabilities
Transfers out of Level 3, liabilities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3
Net amounts of assets included on the Consolidated Balance Sheet
Deposits Paid for Securities Borrowed, at Carrying Value
Transfers out of Level 3
Transfers out of Level 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3
Impairments
Intangible Assets, Excluding Mortgage Servicing Rights Impairments
This element represents the aggregate amount of impairment of intangible assets excluding mortgage servicing rights (MSRs) during the period.
Income from continuing operations (in dollars per share)
Income (Loss) from Continuing Operations, Per Diluted Share
Net income before attribution to noncontrolling interests
Net income before attribution of noncontrolling interests
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Reclassification
Other, net
Financing Receivable, Other Assets, Allowance for Credit Loss, Allowance For Credit Loss, Other Changes, Net
Financing Receivable, Other Assets, Allowance for Credit Loss, Allowance For Credit Loss, Other Changes, Net
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Total liabilities
Carrying amount reported on the consolidated balance sheet
Liabilities, Fair Value Disclosure
Interest and Fee Income [Line Items]
Interest and Fee Income [Line Items]
Interest and Fee Income [Line Items]
Securities-for-securities lending transactions
Securities Received as Collateral
Revolving line of credit arrangements
Financing Receivable, Excluding Accrued Interest, Revolving
Medium-Term Senior Notes, Series N, Floating Rate Notes Due March 29, 2029 of CGMHI
Medium-Term Senior Notes, Series N, Floating Rate Notes Due March 21, 2029 of CGMHI [Member]
Medium-Term Senior Notes, Series N, Floating Rate Notes Due March 21, 2029 of CGMHI
Investment funds
Investment Funds [Member]
This element represents company's investment funds that invest in various asset classes including private equity, hedge funds, real estate, fixed income and infrastructure for which it earns management fee.
City Area Code
City Area Code
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
Schedule of fair value of loans and other disclosures for certain credit related products
Schedule of Fair Value of Loans and Other Disclosures for Certain Credit Products [Table Text Block]
Represents the schedule of fair value of loans and other disclosures for certain credit related products.
Equity forward
Measurement Input, Equity Forward [Member]
Measurement Input, Equity Forward
Lease liabilities location
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]
Excluded component of fair value hedges
Fair Value Hedging [Member]
Net income available to common shareholders
Income (Loss) Available to Common Stockholders
This element represents net income available to common shareholders before allocation to participating securities.
AO Citibank
AO Citibank [Member]
AO Citibank
Non-marketable equities
Non-Marketable Equity Securities, Measurement Input
Non-Marketable Equity Securities, Measurement Input
Schedule of Servicing Assets at Fair Value [Table]
Servicing Asset at Fair Value, Activity [Table]
AOCI, Derivative Qualifying as Hedge, Excluded Component, Noncontrolling Interest
AOCI, Derivative Qualifying as Hedge, Excluded Component, Noncontrolling Interest [Member]
Net change in NCI
Noncontrolling Interest, Period Increase (Decrease)
Equity futures and forwards
Equity Future and Forward [Member]
Equity Future and Forward [Member]
Corporate loans
Corporate Loans [Member]
This element represents corporate loans.
Marketable equity securities carried at fair value
Equity Securities, FV-NI
Reasonably possible unaccrued loss
Loss Contingency, Estimate of Possible Loss
Government-guaranteed
Government-Guaranteed Collateral [Member]
Net amounts
Securities Sold under Agreements to Resell Securities Loaned Amount Offset Against Collateral
Amount of securities sold under agreements to repurchase and securities loaned offset against a right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.
Price
Measurement Input, Price [Member]
Measurement Input, Price [Member]
Total commissions and fees
Commissions And Fees
Commissions And Fees
Transfers out of Level 3, assets
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3
Changes in level 3 fair value category
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Table Text Block]
This element represents, for the fair value measurement of assets and liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (net); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs).
Total investments
Investments
Investments Excluding Trading Securities, Excluding Accrued Interest
Sum of the carrying amounts as of the balance sheet date of all investments, excluding trading account assets.
Citigroup (own credit) CVA
Derivative Credit Risk Valuation Adjustment, Derivative Liabilities
Total intangible assets
Intangible Assets, Including Mortgage Servicing Rights
This element represents the sum of the carrying amounts of all intangible assets excluding goodwill but including mortgage servicing rights, as of the balance sheet date that is net of accumulated amortization and impairment charges.
Late fees
Late Fee Income Generated by Servicing Financial Assets, Amount
Accumulated Gain (Loss), Net, Cash Flow Hedge, Noncontrolling Interest
Accumulated Gain (Loss), Net, Cash Flow Hedge, Noncontrolling Interest [Member]
Supplemental disclosure of cash flow information for continuing operations
Supplemental Cash Flow Information [Abstract]
Balance at beginning of period, asset (liability), net
Balance at end of period, asset (liability), net
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs
Other Performance Measure, Amount
Other Performance Measure, Amount
Schedule of restricted cash
Restrictions on Cash and Cash Equivalents [Table Text Block]
Liquidity facilities
Liquidity Facilities [Member]
This element represents the notional amount of funding commitments for liquidity facilities of VIEs.
Related and Nonrelated Parties [Domain]
Related and Nonrelated Parties [Domain]
Trading derivatives, net
Trading Account Assets and Trading Liabilities [Member]
Represents information in the aggregate pertaining to trading account assets are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time); and liabilities that pertain to principal and customer trading transactions, or which may be incurred with the objective of generating a profit from short-term fluctuations in price as part of an entity's market-making, hedging and proprietary trading.
DVA related to own FVO liabilities
Derivative Debt Valuation Adjustment, Gain (Loss) on Fair Value Option Liability
Derivative Debt Valuation Adjustment, Gain (Loss) on Fair Value Option Liability
Equity Securities without Readily Determinable Fair Value, Annual Amount [Abstract]
Equity Securities without Readily Determinable Fair Value, Annual Amount [Abstract]
Liabilities
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Credit Loss Status [Axis]
Credit Loss Status [Axis]
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member]
Cash paid during the period for interest
Interest Paid, Excluding Capitalized Interest, Operating Activity
Purchased assets outstanding under conduits
Purchased Assets Outstanding Under Conduits
Represents the amount of purchased assets outstanding under conduits.
ROU asset
Operating Lease, Right-of-Use Asset
Variable Interest Entity, Type [Axis]
Variable Interest Entity, Type [Axis]
Variable Interest Entity, Type
LIBOR
London Interbank Offered Rate (LIBOR) 1 [Member]
London Interbank Offered Rate (LIBOR) 1
Commercial and similar letters of credit
Commercial and Similar Letter of Credit [Member]
Represents the irrevocable undertaking to guarantee payment of specified commercial and similar obligation if defined events occur or fail to occur.
Cash flows from operating activities of continuing operations
Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract]
Series DD
Series DD Preferred Stock [Member]
Series DD Preferred Stock
NCLs
Financing Receivable, Other Assets, Allowance for Credit Loss, Writeoff After Recovery
Financing Receivable, Other Assets, Allowance for Credit Loss, Writeoff After Recovery
Total non-accrual
Financing Receivable, Nonaccrual
Securities and other marketable assets held as collateral
Securities and Other Marketable Assets Held as Collateral
Securities and Other Marketable Assets Held as Collateral
Insurance distribution revenue
Insurance Distribution Revenue [Member]
Insurance Distribution Revenue [Member]
Increase (Decrease) in Stockholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Gross unrealized losses
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Transfers into Level 3, liabilities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3
Net reserve builds (releases) for loans
Net reserve builds (releases)
Financing Receivable, Excluding Accrued Interest, Reserve Builds or Releases, Net
Provision charged or released during the period against earnings for credit losses on loans and leases receivable that are expected and were collectively evaluated for impairment.
Purchases
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI)
Comprehensive Income (Loss) Note [Text Block]
Weighted Average
Weighted Average [Member]
One- to four-family residential mortgages
One to Four Family Residential Mortgages Commitment [Member]
A one- to four-family residential mortgage commitment is a written confirmation from Citigroup to a seller of a property that the bank will advance the specified sums enabling the buyer to complete the purchase.
Debt securities, measurement input
Debt Securities, Available-for-Sale, Measurement Input
Gross realized investment gains
Gross Realized Gain on Marketable Securities and Cost Method Investments Excluding Other than Temporary Impairments and Other Investments
This item represents the total gross realized gain included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains realized during the period from the sale of investments accounted for under the cost method of accounting and/or investments that are separately or otherwise not categorized as trading, available-for-sale, or held-to-maturity.
Changes in each component of accumulated other comprehensive income (loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Series T
Series T Preferred Stock [Member]
Outstanding nonredeemable series T preferred stock or outstanding series T preferred stock. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer.
Residential
Residential
Residential Mortgage-Backed Securities [Member]
Arrangement Duration
Trading Arrangement Duration
Deposits with banks
Deposits with banks, net of allowance
Deposits With Banks [Member]
Deposits With Banks [Member]
After 5 years
Credit Derivative Maturities Rolling after Year Five [Member]
Represents the credit derivatives maturing after the fifth rolling twelve months following the latest balance sheet presented.
Citi-administered asset-backed consolidated commercial paper conduits (ABCP)
Entity Consolidated Administered Asset-backed Commercial Paper Conduit [Member]
This element represents entity-administered asset-backed consolidated commercial paper conduits.
Credit Derivatives Contract Type [Domain]
Credit Derivatives Contract Type [Domain]
Assets
Assets [Abstract]
Broker-dealer and other
Broker Dealer Entities [Member]
Represents the broker-dealer subsidiaries that are consolidated into the entity.
Change in short-term borrowings
Proceeds from Short-Term Debt
Repurchase reserve for consumer mortgages representations and warranties
Repurchase Reserve Consumer Mortgages Representations and Warranties
This element represents the repurchase reserve created for consumer mortgages, representations and warranties.
Gain (loss) on fair value hedges
Effect of Fair Value Hedges on Results of Operations [Abstract]
Treasury stock acquired
Treasury Stock, Value, Acquired, Cost Method
Allowance for credit losses on unfunded commitments
Financing Receivable, Allowance For Credit Losses, Unfunded Lending Commitments [Roll Forward]
Financing Receivable, Allowance For Credit Losses, Unfunded Lending Commitments [Roll Forward]
Gains recognized on the securitization
Gain (Loss) on Securitization of Financial Assets
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member]
Does not meet applicable offsetting guidance, liabilities
Derivative Liability, Not Subject to Master Netting Arrangement
Gross amounts offset on the Consolidated Balance Sheet
Securities Purchased under Agreements to Resell Securities Borrowed Liability
Amount of liability associated with securities purchased under agreements to resell and securities borrowed.
State and municipal, foreign government, corporate and other debt securities
State And Municipal, Foreign Government, Corporate And Other Debt Securities, Measurement Input
State And Municipal, Foreign Government, Corporate And Other Debt Securities, Measurement Input
Depreciation and amortization
Depreciation, Amortization and Accretion, Net
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default
Securities Sold under Agreements to Resell Securities Loaned Collateral Right to Reclaim Securities
Amount of right to receive securities collateral under master netting arrangements that have not been offset against securities sold under agreements to repurchase and securities loaned.
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
Classifiably managed
Classifiably Managed [Member]
Classifiably Managed
Changes in fair value due to instrument-specific credit risk loss
Fair Value, Option, Credit Risk, Gains (Losses) on Assets
Trading Activity [Axis]
Trading Activity [Axis]
Total, amortized cost
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, Before Allowance For Credit Loss, Including Cumulative Basis Adjustments
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, Before Allowance For Credit Loss, Including Cumulative Basis Adjustments
Securities borrowed and purchased under agreements to resell
Securities borrowed and purchased under agreements to resell
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell [Member]
Total assets
Carrying amount reported on the Consolidated Balance Sheet
Assets, Fair Value Disclosure
Non-marketable equity securities measured using the measurement alternative
Measurement alternative—carrying value
Equity Securities without Readily Determinable Fair Value, Amount
Mortgage servicing rights
Servicing Asset at Fair Value, Amount
Reconciling Items
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Components of intangible assets, finite-lived
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Brokerage Commissions
Brokerage Commissions [Member]
Brokerage Commissions [Member]
Underlying Asset Class [Domain]
Underlying Asset Class [Domain]
Schedule of Short-term Debt [Table]
Short-Term Debt [Table]
Loans HFS
Loan, Held-for-Sale, Fair Value Disclosure
Securities borrowed
Deposits Paid for Securities Borrowed, at Carrying Value, Before Allowance For Credit Loss
Deposits Paid for Securities Borrowed, at Carrying Value, Before Allowance For Credit Loss
Commissions and fees
Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions
Benefit for income taxes
Discontinued Operation, Tax Effect of Discontinued Operation
Banking and Thrift, Interest [Abstract]
Banking and Thrift, Interest [Abstract]
Name
Awards Close in Time to MNPI Disclosures, Individual Name
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net
Collectively evaluated
Financing Receivable, Collectively Evaluated for Credit Loss
Citigroup Capital XIII
Citigroup Capital X I I I [Member]
This element represents Citigroup Capital XIII, a trust security with distributions guaranteed by Citigroup.
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest [Member]
Add: Other comprehensive income (loss) attributable to noncontrolling interests
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest
Other financial liabilities measured on a recurring basis
Other financial liabilities
Other Financial Liabilities Including Non Trading Derivatives [Member]
Represents the aggregate of financial liabilities not separately disclosed in the balance sheet. Includes nontrading derivative liabilities.
Employee benefit plans
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
Significant valuation techniques and most significant unobservable inputs used in Level 3 fair value measurements
Fair Value Assets and Liabilities Measured on Recurring and Non-recurring Basis Unobservable Input Reconciliation [Table Text Block]
Tabular disclosure of the fair value measurement of assets and liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets and liabilities) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets and liabilities) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset and liability.
Summarized income statement
Condensed Income Statement [Table Text Block]
Segments [Domain]
Segments [Domain]
Short-term borrowings
Short-Term Debt [Member]
INVESTMENTS
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Balance Sheet Location [Domain]
Statement of Financial Position Location, Balance [Domain]
Less: Cash collateral received
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Net unrealized gains (losses) on debt securities
Net unrealized gains (losses) on debt securities
Realized gains (losses) on investment securities
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Home equity term loans
Home Equity Term Loans [Member]
Home Equity Term Loans
Mortgage-backed securities
Mortgage-backed Securities, Fair Value Disclosure
Mortgage-backed Securities, Fair Value Disclosure
Less: Netting agreements to liabilities
Netting agreements to liabilities
Fair value gross derivative assets
Netting agreements
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset
Senior notes
Senior Notes [Member]
FAIR VALUE ELECTIONS
Fair Value, Option [Text Block]
State and municipal securities
State and municipal
US States and Political Subdivisions Debt Securities [Member]
Nonrecurring fair value changes included in earnings
Fair Value, Adjustment Disclosure [Abstract]
One year prior to current fiscal year
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year
Schedule of corporate loans by type
Financing Receivables Carrying Amount [Table Text Block]
Disclosure of the carrying amount of loans and lease receivables as of the balance sheet date, net of deferred income.
Citigroup Capital III
Citigroup Capital I I I [Member]
This element represents Citigroup Capital III, a trust security with distributions guaranteed by Citigroup.
Financial Asset, Aging [Axis]
Financial Asset, Aging [Axis]
Schedule of Securitized Credit Card Receivables
Schedule of Securitized Credit Card Receivables [Table Text Block]
This element represents the schedule of securitized credit card receivables.
All Executive Categories
All Executive Categories [Member]
Securities loaned and sold under agreement to repurchase
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Measurement Input
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Measurement Input
Common stock ($0.01 par value; authorized shares: 6 billion), issued shares: as of March 31, 2026—3,099,784,716 and as of December 31, 2025—3,099,752,593
Common Stock, Value, Issued
Fair value of re-securitizations deals in which the entity holds a retained interest
Fair Value of Re-securitizations Deals in which Entity Holds Retained Interest
Represents the fair value of re-securitizations deals in which entity holds retained interest.
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments
Total return swaps and other
Total Return Swap and Other Credit Derivatives [Member]
Represents information pertaining to contracts in which one party makes payments at a fixed or variable rate while the counterparty makes payments based on an asset, including the income and capital gains derived there from, and other credit derivative contracts not separately identified.
Transactional service fees
Transactional Service Fees [Member]
Transactional Service Fees [Member]
Current year
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff
Fair Value Measured at Net Asset Value Per Share
Fair Value Measured at Net Asset Value Per Share [Member]
Total comprehensive income
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Cleared
Exchange Cleared [Member]
Impairment losses on investments and other assets
Investment Other Asset Impairment Charges
Investment Other Asset Impairment Charges
AOCI, Liability for Future Policy Benefit, Noncontrolling Interest
AOCI, Liability for Future Policy Benefit, Noncontrolling Interest [Member]
Interest and dividends on investments
Investment Income [Table Text Block]
Percentage owned of equity investment
Equity Method Investment, Ownership Percentage
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Noncontrolling Interest
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Noncontrolling Interest [Member]
Medium-Term Senior Notes, Series N, Floating Rate Notes Due September 15, 2028 of CGMHI
Medium-Term Senior Notes, Series N, Floating Rate Notes Due September 15, 2028 of CGMHI [Member]
Medium-Term Senior Notes, Series N, Floating Rate Notes Due September 15, 2028 of CGMHI
Long-term debt, cumulative fair value hedging adjustment included in the carrying amount, active
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)
Fair value, after 10 years
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10
Balance, beginning of period, tax effect
Balance, end of period, tax effect
AOCI Including Portion Attributable to Noncontrolling Interest, Tax
Change in accumulated other comprehensive income (loss), tax effect
Increase (Decrease) in Accumulated Other Comprehensive (Loss) Income Tax Portion [Roll Forward]
Hedging Designation [Axis]
Hedging Designation [Axis]
Other interest-earning assets
Other Interest and Dividend Income
Short-term borrowings and long-term debt
Debt Instrument, Fair Value Disclosure
Scenario [Axis]
Scenario [Axis]
Total net payables
Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Amount of gain (loss) reclassified from AOCI to earnings
Pretax loss
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax
Derivative Contract [Domain]
Derivative Contract [Domain]
Domestic Plan
Domestic Plan [Member]
Financing Receivable, Allowance for Credit Loss [Table]
Financing Receivable, Allowance for Credit Loss [Table]
Held-to-maturity (HTM) debt securities
Debt Securities, Held-to-Maturity, Parenthetical Disclosure [Abstract]
Capital expenditures on premises and equipment and capitalized software
Payments to Acquire Property, Plant, and Equipment
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]
IR-FX correlation
Measurement Input, Interest Rate - Foreign Exchange Correlation [Member]
Measurement Input, Interest Rate - Foreign Exchange Correlation
Individually evaluated
Financing Receivable, Individually Evaluated for Credit Loss
Securities loaned and sold under agreements to repurchase
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]
Fair values, receivable
Credit Risk Derivative Assets, at Fair Value
Gain (loss) on change in estimated fair value of debt liabilities due to change in company's own credit risk
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, after Tax
Trading mortgage-backed securities
Trading Assets Excluding Derivative Assets [Member]
Investments which the entity trades for its own profit, which may include, but is not limited to, debt securities, equity security securities, mortgage-backed and asset-backed securities and loans. Excludes trading account derivatives.
Foreign currency translation
Goodwill, Foreign Currency Translation, Gain (Loss)
Custody fees
Custody Fees [Member]
Custody Fees [Member]
PRINCIPAL TRANSACTIONS
Principal Transactions [Text Block]
Disclosure of revenue by reporting categories or types of financial instruments, including derivatives but excluding dividends and interests, from trading.
Other
Guarantee Type, Other [Member]
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Derivative Credit Risk and Funding Valuation Adjustment, Gain (Loss), Net
Derivative Credit Risk and Funding Valuation Adjustment, Gain (Loss), Net
Derivative Credit Risk and Funding Valuation Adjustment, Gain (Loss), Net
Schedule of amounts recorded on the Balance Sheet related to cumulative basis adjustments for fair value hedges
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
Corporate loans
Corporate loans
Commercial Portfolio Segment [Member]
Credit cards
Total credit cards
Credit Card Receivable [Member]
Forecast
Forecast [Member]
Title of 12(b) Security
Title of 12(b) Security
Lessee, Lease, Description [Table]
Lessee, Lease, Description [Table]
Provision for credit losses on loans
Total provision for credit losses on loans (PCLL)
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal)
Schedule of cash flow information, mortgage securitizations
Schedule of Cash Flow Mortgage Securitizations [Table Text Block]
This element represents the schedule of cash flow information related to the mortgage securitizations of the segment.
Increase in total ACL
Financing Receivable, Off-Balance Sheet Liability, Other Assets, And HTM Debt Securities, Increase (Decrease) In Allowances For Credit Loss
Financing Receivable, Off-Balance Sheet Liability, Other Assets, And HTM Debt Securities, Increase (Decrease) In Allowances For Credit Loss
Physical commodities inventories, cumulative basis adjustments
Hedged Asset, Fair Value Hedge, Physical Commodities Inventory, Cumulative Basis Adjustments
Hedged Asset, Fair Value Hedge, Physical Commodities Inventory, Cumulative Basis Adjustments
Earnings Per Share [Abstract]
Earnings Per Share [Abstract]
Investments
Investments [Line Items]
Investments
Own credit CVA
Derivative Credit Risk Valuation Adjustment, Gain (Loss)
Derivative Credit Risk Valuation Adjustment, Gain (Loss)
Short-Term Debt, Type [Axis]
Short-Term Debt, Type [Axis]
Non-investment grade, accrual
External Credit Rating, Non Investment Grade, Accrual [Member]
External Credit Rating, Non Investment Grade, Accrual [Member]
Classifiably Managed and Delinquency Managed
FICO Score, Classifiably Managed and Delinquency Managed [Member]
FICO Score, Classifiably Managed and Delinquency Managed
Total other-than-temporary impairments recognized
Other than Temporary Impairment Losses Investments [Table Text Block]
This item represents the disclosure of other-than-temporary impairment losses on investments.
Loans
Loans, Measurement Input
Loans, Measurement Input
Allowance for credit losses on HTM debt securities
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Award Timing Disclosures [Line Items]
Revolving loans converted to term loans
Revolving Loans Converted To Term Loans [Member]
Revolving Loans Converted To Term Loans
Comparable analysis
Valuation, Comparable Analysis [Member]
Valuation, Comparable Analysis
Citigroup’s net income
Citigroup’s net income
Net Income (Loss) Attributable to Parent
Excluded component of fair value hedges
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments and Tax, Parent
Collateralized loan obligations (CLOs)
Collateralized Loan Obligations [Member]
Other, net
Off-Balance Sheet, Credit Loss, Liability, Other Adjustments, Net
Off-Balance Sheet, Credit Loss, Liability, Other Adjustments, Net
Number of rating agencies
Credit Derivatives number of Rating Agencies
Represents the number of rating agencies under credit derivatives.
Restrictions on Cash and Cash Equivalents [Table]
Restrictions on Cash and Cash Equivalents [Table]
Securities lending indemnifications
Securities Lending Indemnifications [Member]
Represents the indemnifications issued by the bank with regard to securities lending to guarantee that a securities lending customer will be made whole in the event that the security borrower does not return the security subject to the lending agreement and the collateral held is insufficient to cover the market value of the security.
Adoption Date
Trading Arrangement Adoption Date
Financing Receivable, Past Due [Table]
Financing Receivable, Past Due [Table]
Deposits
Interest-Bearing Deposits [Member]
Retained earnings
Retained Earnings (Accumulated Deficit)
Summary of outstanding trust preferred securities
Schedule of Trust Preferred Securities [Table Text Block]
This element represents the complete disclosure related to trust preferred securities, including issuance date, number of securities issued, liquidation value, coupon rate, and other necessary information.
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member]
Gross carrying amount of Intangible assets (excluding MSRs)
Intangible Assets, Excluding Mortgage Servicing Rights Gross Carrying Amount
This element represents the gross carrying amounts of all intangible assets, excluding goodwill and mortgage servicing rights (MSRs), as of the balance sheet date.
Principal Transaction Revenue [Table]
Principal Transaction Revenue [Table]
WAL
Measurement Input, WAL [Member]
Measurement Input, WAL [Member]
Cash flow hedges
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Carrying value of retained interests
Transferor's Interests in Transferred Financial Assets, Fair Value
Classification of Securitizations
Classification of Securitizations [Line Items]
Variable Rate [Domain]
Variable Rate [Domain]
COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES
Banking and Thrift Disclosure [Text Block]
Change in trading account assets
Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI
Interest rate reduction
Contractual Interest Rate Reduction [Member]
Sales, liability
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales
Postretirement benefit plans
Other Postretirement Benefits Plan [Member]
Treasury stock, at cost: March 31, 2026—1,394,207,761 shares and December 31, 2025— 1,352,205,592 shares
Treasury Stock, Common, Value
Re-securitizations
Re-securitizations [Abstract]
Re-securitizations [Abstract]
Deposits with banks, net of allowance
Interest-Bearing Deposits in Banks and Other Financial Institutions
Net interest income
Interest Income (Expense), Net [Member]
Interest Income (Expense), Net [Member]
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Allowance for credit losses on loans (ACLL)
Allowance for credit losses on loans (ACLL) at beginning of period
ACLL at end of period
Total ACLL
Allowance for credit losses
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest
Due within 1 year, amortized cost
Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One
Letters of credit in favor of the Company held as collateral
Letters of Credit Received as Collateral
Represents the letters of credit in favor of the entity held as collateral to reimburse losses realized under the guarantees.
Securities sold under agreements to repurchase
Repurchase agreements
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement
Weighted-average common shares outstanding (in shares)
Weighted-average common shares outstanding applicable to basic EPS (in shares)
Weighted Average Number of Shares Outstanding, Basic
Schedule of deposits
Deposit Liabilities, Type [Table Text Block]
Discretionary contribution
Defined Benefit Plan Cash Contributions Paid by Employer
Defined Benefit Plan Cash Contributions Paid by Employer
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Scenario [Domain]
Scenario [Domain]
Schedule of CVA and FVA applied to fair value of derivative instruments
Schedule of Credit Value Adjustments and Funding Valuation Adjustments to Fair Value Applied to Derivative Instruments [Table Text Block]
Schedule of Credit Value Adjustments and Funding Valuation Adjustments to Fair Value Applied to Derivative Instruments [Table Text Block]
Classification of Other Securitization Details
Classification of Other Securitization Details [Line Items]
Non-investment grade
External Credit Rating, Noninvestment Grade [Member]
Premises and equipment
Occupancy, Net
Total past due and accruing
Financing Receivable, Recorded Investment, Past Due And Accruing
Financing Receivable, Recorded Investment, Past Due And Accruing
Prior
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year
Current
Financial Asset, Not Past Due [Member]
Allowance for credit losses
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest
Total liabilities
Liabilities
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Settlements
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements
Corporate loans, net of unearned income, excluding portfolio layer cumulative basis adjustments
Financing Receivable, before Allowance for Credit Loss, Excluding Portfolio Layer Cumulative Basis Adjustments
Financing Receivable, before Allowance for Credit Loss, Excluding Portfolio Layer Cumulative Basis Adjustments
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Less: Non-cash collateral paid
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset
Issuance of new preferred stock
Stock Issued During Period, Value, New Issues
Fair value of derecognized assets
Transfer of Financial Assets Accounted for as Sales, Fair Value of Derecognized Assets
Asset-based financing
Asset-backed securities
Asset-Backed Securities [Member]
Valuation techniques and inputs for Level 3 nonrecurring fair value measurements
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]
Netting, Assets, total of netting agreements and cash collateral received
Assets Derivative Asset Fair Value Gross Liability Obligation to Return Cash Offset and Securities Purchased under Agreements to Resell Liability
Represents the aggregate of fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset; obligation to return cash collateral under master netting arrangements; and amount of liability associated with funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price.
Proceeds from maturities of investments
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Purchased credit deteriorated
Financing Receivable, Purchased Credit-Deteriorated
Financing Receivable, Purchased Credit-Deteriorated
Non-NEOs
Non-NEOs [Member]
Change in loans
Payments for (Proceeds from) Other Loans and Leases
Basis spread on variable rate
Trust Preferred Securities, Basis Spread On Variable Rate
Trust Preferred Securities, Basis Spread On Variable Rate
Total provisions for credit losses and for benefits and claims
Provisions for credit losses and for benefits and claims
Provision for credit losses
Provision For Credit Loss, Benefits And Claims, Expense (Reversal)
Provision For Credit Loss, Benefits And Claims, Expense (Reversal)
Realized gains on sales of investments, net
Net realized gains on sales of investments
Realized gains and (losses)
Realized Investment Gains (Losses)
Debt valuation adjustment (DVA)
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax and Reclassification Adjustment, Attributable to Parent
Less: Netting of cash collateral received
Netting of cash collateral received
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset
Award Timing Predetermined
Award Timing Predetermined [Flag]
Certain loans and other credit product
Certain Loans and Other Credit Products [Member]
Represents certain loan and other credit products of the entity for certain originated and purchased loans, including certain unfunded loan products such as guarantees and letters of credit.
Credit products and risks
Credit derivatives
Credit derivatives (gross)
Credit Risk Contract [Member]
Tabular List, Table
Tabular List [Table Text Block]
Comparable analysis
Valuation Technique, Comparables Analysis [Member]
Valuation Technique, Comparables Analysis
Accumulated amortization of Intangible assets
Intangible Assets, Including Mortgage Servicing Rights Accumulated Amortization
This element represents the accumulated amortization of all intangible assets excluding goodwill but including mortgage servicing rights (MSRs), as of the balance sheet date.
Non-interest-bearing deposits in U.S. offices
Noninterest-Bearing Deposit Liabilities, Domestic
Goodwill [Line Items]
Goodwill [Line Items]
Measurement Basis [Axis]
Measurement Basis [Axis]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Loans sold and/or reclassified to held-for-sale
Sales or Reclassification of Portfolio Loans to Held-for-sale
Total amount of portfolio loans sold and or reclassified to loans held-for-sale during the period.
Maximum exposure to loss in significant unconsolidated VIEs, equity investments
Variable Interest Entity Equity Investments Funded Maximum Exposure to Loss
This element represents the maximum funded exposure to loss in a significant unconsolidated variable interest entity, related to equity investments.
Financing Receivable Portfolio Segment [Domain]
Financing Receivable Portfolio Segment [Domain]
Gross recoveries on loans
Recoveries
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery
Schedule of Stock by Class [Table]
Stock, Class of Stock [Table]
Total assets
Disposal Group, Including Discontinued Operation, Assets
Change in other assets
Increase (Decrease) in Other Operating Assets
Credit card securitizations
Collateralized Credit Card Securities [Member]
Measurement alternative—impairment losses
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount
Other, net (see table below)
Other, net (ACLL)
Other
Financing Receivable, Excluding Accrued Interest, Allowance For Credit Loss, Adjustments, Other
Financing Receivable, Excluding Accrued Interest, Allowance For Credit Loss, Adjustments, Other
Securities sold, not yet purchased
Securities Sold, Not yet Purchased [Member]
Total loans, net of allowance
Financing Receivable, after Allowance for Credit Loss
Cash Equivalents
Cash and Cash Equivalents, Policy [Policy Text Block]
Original fair value of re-securitizations deals in which the entity holds a retained interest
Original Fair Value of Re Securitizations Deals in which Entity Holds Retained Interest
Represents the amount of original fair value of re-securitizations deals in which the entity holds a retained interest.
Trial modifications, period
Financing Receivable, Modified in Period, Trial Modifications, Period
Financing Receivable, Modified in Period, Trial Modifications, Period
Personal installment loan
Consumer Loan [Member]
Loans that had gone through bankruptcy
Financing Receivable, Modified in Period, Bankruptcy, Amount
Financing Receivable, Modified in Period, Bankruptcy, Amount
Total Citigroup stockholders’ equity
Equity, Attributable to Parent
After 5 but within 10 years, amortized cost
Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10
Debt Securities, Available-for-sale [Table]
Debt Securities, Available-for-Sale [Table]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Insider Trading Policies and Procedures [Line Items]
Carrying value of structured notes
Certain Structured Liabilities
Represents the carrying value of certain structured liabilities.
Impairment losses recognized in earnings for debt securities that the Company intends to sell, would more-likely-than-not be required to sell or will be subject to an issuer call deemed probable of exercise
Debt Securities, Available-For-Sale, Realized Gain (Loss), Intent To Sell
Debt Securities, Available-For-Sale, Realized Gain (Loss), Intent To Sell
Assets
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loan / equity commitments
Loan Commitments [Member]
This element represents the notional amount of funding commitments for loan commitments of VIEs.
Recurring
Fair Value, Recurring [Member]
Liquidation losses
Net Credit Losses on Loans Managed or Securitized or Asset-Backed Financing Arrangement
Net Credit Losses on Loans Managed or Securitized or Asset-Backed Financing Arrangement
FICO not available
FICO Score, Not Available [Member]
FICO Score, Not Available
Cover [Abstract]
Cover [Abstract]
Mortgage servicing rights
Mortgage Service Rights [Member]
This element represents mortgage servicing rights (MSR).
SIGNIFICANT DISPOSALS AND OTHER BUSINESS EXITS
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Portion at Fair Value Measurement
Portion at Fair Value Measurement [Member]
Maximum
Maximum [Member]
Aggregate unpaid principal balance in excess of (less than) fair value
Fair Value, Option, Aggregate Differences, Long-Term Debt Instruments
Total
Debt Securities, Available-for-Sale, Unrealized Loss Position
Amortized cost, after 10 years
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10
Schedule of guarantor obligations by credit ratings
Schedule of Guarantee Obligations by Credit Ratings [Table Text Block]
Provides pertinent information about each guarantee obligation, or each group of similar guarantee obligations, by credit ratings, including (a) the nature of the guarantee and (b) the maximum potential amount of future payments (undiscounted) the entity could be required to make under the guarantee.
Unrealized gains (losses) still held, liabilities
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)
Net unrealized gains (losses)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax
Transactions between Citigroup and NCI
Increase (Decrease) from Transactions Between Consolidating Entity and Noncontrolling Interest Shareholders
Represents the amount of decrease (increase) in noncontrolling-interest on transaction with noncontrolling-interest holders.
All other assets
Other Assets [Member]
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Deposits with banks
Interest Income, Deposits with Financial Institutions
Trading accounts liabilities
Trading Accounts Liabilities [Member]
Primary financial statement caption encompassing trading account liabilities.
Weighted average term extension
Financing Receivable, Modified, Weighted Average Term Increase from Modification
Entity Shell Company
Entity Shell Company
Interest and dividends on investments
Interest and Dividend Income, Securities, by Taxable Status [Abstract]
Schedule of investments by category
Summary Investment Holdings [Table Text Block]
Revolving loans converted to term loans
Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Liability for future policyholder benefits
Liability for Future Policy Benefit, after Reinsurance
Long-term debt, cumulative fair value hedging adjustment included in the carrying amount, de-designated
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Operating Segments
Operating Segments [Member]
Reclassification out of Accumulated Other Comprehensive Income [Table]
Reclassification out of Accumulated Other Comprehensive Income [Table]
Total modified loans balance
Financing Receivable, Excluding Accrued Interest, Modified, During The 12 Months Period
Financing Receivable, Excluding Accrued Interest, Modified, During The 12 Months Period
Principal Transactions Revenue, Net [Abstract]
Principal Transactions Revenue, Net [Abstract]
Mortgage-backed securities
Mortgage-backed Securities, Measurement Input
Mortgage-backed Securities, Measurement Input
Individually evaluated
Financing Receivable, Allowance for Credit Loss, Individually Evaluated
Document Fiscal Period Focus
Document Fiscal Period Focus
Derivative Mark-to-Market (MTM) Receivables/Payables
Derivatives, Fair Value [Line Items]
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Income from continuing operations (in dollars per share)
Income (Loss) from Continuing Operations, Per Basic Share
Revenue multiple
Measurement Input, Revenue Multiple [Member]
Award Type
Award Type [Axis]
Investment, Name [Domain]
Investment, Name [Domain]
Credit commitments
Credit Commitments
Represents the amount of outstanding unused credit commitments made by the entity such as letters of credit, lines of credit and loan commitments.
Guarantees under the Fixed Income Clearing Corporation sponsored member repo program
Guarantees Under The Fixed Income Clearing Corporation [Member]
Guarantees Under The Fixed Income Clearing Corporation
Long-term debt
Interest Expense, Long-Term Debt
Entity Address, City or Town
Entity Address, City or Town
Short-Term Debt, Type [Domain]
Short-Term Debt, Type [Domain]
State and municipal, foreign government, corporate and other debt securities
State And Municipal, Foreign Government, Corporate And Other Debt Securities, Fair Value Disclosure
State And Municipal, Foreign Government, Corporate And Other Debt Securities, Fair Value Disclosure
Non-marketable equity securities carried at cost
Federal Home Loan Bank Stock and Federal Reserve Bank Stock
Class of Financing Receivable [Axis]
Class of Financing Receivable [Axis]
Income Statement Location [Domain]
Statement of Income Location, Balance [Domain]
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Schedule of carrying value of structured notes, disaggregated by type of embedded derivative instrument
Schedule of Carrying Value of Debt Disaggregated by Type of Embedded Derivative Instrument [Table Text Block]
Tabular disclosure of the carrying value of debt, disaggregated by type of embedded derivative instrument.
Entity Emerging Growth Company
Entity Emerging Growth Company
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]
Credit default swaps and options
Credit Default Swaps and Options [Member]
Represents information in the aggregate pertaining to (i) a type of swap transaction used as a credit derivative in which one party makes periodic payments to the other and receives the promise of a pay-off if a third party defaults; and (ii) a contract in which one party has the right to claim a payment from another party in the event that a specified credit event occurs over the life of the contract.
Financing Receivable, Other Assets, Allowance For Credit Loss [Line Items]
Financing Receivable, Other Assets, Allowance For Credit Loss [Line Items]
[Line Items] for Financing Receivable, Other Assets, Allowance For Credit Loss [Table]
Total modified loans balance
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated
Total non-interest revenues
Non-interest revenue
Noninterest Income
Change in securities borrowed and purchased under agreements to resell
Proceeds from (Payments for) Federal Funds Sold and Securities Purchased under Agreements to Resell, Net
Other assets
Other financial assets
Other Assets, Fair Value Disclosure
Cash and due from banks (including segregated cash and other deposits)
Cash and due from banks
Cash
Cash and Due from Banks
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
After 1 but within 5 years, fair value
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five
Weighted-average interest rate reduction %
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification
Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of Citigroup
Variable Interest Entity, Liabilities [Abstract]
Variable Interest Entity, Liabilities
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Restatement Determination Date
Restatement Determination Date
Stockholders' Equity, Period Increase (Decrease)
Stockholders' Equity, Period Increase (Decrease)
Income from discontinued operations, net of taxes (in dollars per share)
Discontinued operations (in dollars per share)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share
Other assets (including $17,652 and $15,840 as of March 31, 2026 and December 31, 2025, respectively, at fair value), net of allowance
Other assets, at fair value
Other
Other Assets
Balance at beginning of period, asset
Balance at end of period, asset
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value
Mortgage servicing rights
Servicing Asset, Measurement Input
Hedging instruments under ASC 815
Derivative instruments designated as ASC 815 hedges
Designated as Hedging Instrument [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Servicing fees
Contractually Specified Servicing Fees, Amount
Medium-Term Senior Notes, Series N, Callable Fixed Rate Notes Due April 26, 2028 of CGMHI (and registrant’s guaranty with respect thereto)
Medium-Term Senior Notes, Series N, Callable Fixed Rate Notes Due April 26, 2028 Of CGMHI [Member]
Medium-Term Senior Notes, Series N, Callable Fixed Rate Notes Due April 26, 2028 Of CGMHI
Schedule of credit commitments
Schedule of Credit Commitments [Table Text Block]
Provides the amount of outstanding credit commitments by type and location of commitment.
Average deposits
Interest-bearing Deposits in Banks and Other Financial Institutions, Average Amount
Interest-bearing Deposits in Banks and Other Financial Institutions, Average Amount
Gross realized investments losses, excluding losses from other-than-temporary impairment
Equity Securities, FV-NI, Realized Gain (Loss) [Abstract]
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Liability Gain (Loss) Included in Earnings or Other Comprehensive Income (Loss)
Amount of gain (loss) recognized in earnings or other comprehensive income (loss), arising from liabilities measured at fair value on a recurring basis using unobservable inputs (level 3).
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Securities transferred to re-securitization entities
Securities Transferred to Re Securitization Entities
Represents the amount of securities transferred to re-securitization entities.
Commodity and other swaps
Commodity and Other Swaps [Member]
Commodity and Other Swaps [Member]
Net cash provided by (used in) operating activities of continuing operations
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Interest revenue and interest expense
Schedule of Interest Revenues and Expenses [Table Text Block]
Disclosure of the components of interest revenue and interest expense for the reporting period.
Proceeds from sales of investments
Proceeds from Sale of Debt Securities, Available-for-Sale
Available-for-sale debt securities (including $6,286 and $4,931 pledged to creditors as of March 31, 2026 and December 31, 2025, respectively)
Available-for-sale (AFS) debt securities
Fair value
Total fair value
Debt Securities, Available-for-Sale, Excluding Accrued Interest
Subsequent event
Subsequent Event [Member]
Net interest income
Net interest income
Interest Income (Expense), Operating
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
Long-term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Equity Components [Axis]
Equity Components [Axis]
Three years prior to current fiscal year
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year
Non-marketable equities
Non-Marketable Equity Securities, Fair Value Disclosure
Non-Marketable Equity Securities, Fair Value Disclosure
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets
Fair Value, Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Gain (Loss) Included in Earnings or Other Comprehensive Income (Loss)
Amount of gain (loss) recognized in earnings or other comprehensive income (loss), arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3).
Commercial and other real estate
Commercial Real Estate [Member]
Financial Asset, Aging [Domain]
Financial Asset, Aging [Domain]
USCC
U.S. Personal Banking [Member]
U.S. Personal Banking
Mortgage servicing rights
Servicing Asset
Card rewards and partner payments
Credit And Bank Card Income, Card Rewards And Partner Payments [Member]
Credit And Bank Card Income, Card Rewards And Partner Payments [Member]
Deposits with banks
Disposal Group, Including Discontinued Operation, Deposits With Banks
Disposal Group, Including Discontinued Operation, Deposits With Banks
Number of depositary shares (in shares)
Depositary Shares, Issued
Represents the total number fractional shares of preferred stock issued to the holders.
Less than or equal to 80%
Debt-to-Value Ratio, Less than 80 Percent [Member]
Change in loans held-for-sale (HFS)
Increase (Decrease) in Loan, Held-for-Sale
Commercial and other consumer loan commitments
Commercial and Other Consumer Loan Commitments [Member]
Commercial and other consumer loan commitments include overdraft and liquidity facilities, as well as commercial commitments to make or purchase loans, to purchase third-party receivables, to provide note issuance or revolving underwriting facilities and to invest in the form of equity.
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
IR-IR correlation
Measurement Input, Interest Rate - Interest Rate Correlation [Member]
Measurement Input, Interest Rate - Interest Rate Correlation
Related specific allowance
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Nonaccrual
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Nonaccrual
Expire after 1 year
Guarantee Obligations Maximum Exposure Expire after One Year
Represents the maximum potential payments with respect to the entity's guarantees that expire after one year.
Series EE
Series EE Preferred Stock [Member]
Series EE Preferred Stock
Total ACLL and ACLUC
Financing Receivable And Off-Balance Sheet Liability, Allowances For Credit Loss
The reserve to cover probable credit losses related to financing receivable and unfunded lending commitments as of the balance sheet date.
Home equity loans
Revolving open-end loans secured by one- to four-family residential properties
Home Equity Line of Credit [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified [Line Items]
Provision (release) for credit losses on HTM debt securities
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Credit Loss Expense (Reversal)
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset
Total operating expenses
Total operating expenses
Noninterest Expense
Retained by Citigroup as trust-issued securities
Portion of Securitized Assets and Any Other Financial Assets Managed Together Retained by Trust Issued Securities
This element represents the ownership interests in principal amount of trust credit card receivables retained by the reporting entity as trust-issued securities.
Payment delay
Payment Deferral [Member]
Ownership [Domain]
Ownership [Domain]
Government and official institutions
Government and Official Institutions [Member]
Represents financing receivables from government and official institutions.
Commercial paper
Commercial Paper
Change in brokerage receivables net of brokerage payables
Increase (Decrease) in Broker-Dealer Related Receivables (Payables), Net
Notionals, protection sold
Credit Derivative, Maximum Exposure, Undiscounted
Commodity and other risks
Commodity and other contracts
Commodity and Other Contracts [Member]
Represents information in the aggregate for a derivative instrument whose primary underlying risk is tied to commodity prices and a derivative instrument whose primary underlying risk is not otherwise detailed in this disclosure.
Foreign exchange swaps
Currency Swap [Member]
Model-based
Valuation Technique, Model-based [Member]
Valuation Technique, Model-based
Schedule of loans credit quality indicators
Financing Receivable Credit Quality Indicators [Table Text Block]
Total CVA and FVA—derivative instruments
Derivative Credit Risk and Funding Valuation Adjustment, Derivative Assets
Derivative Credit Risk and Funding Valuation Adjustment, Derivative Assets
Balance at beginning of period, liability
Balance at end of period, liability
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Schedule of Defined Benefit Plans Disclosures [Table]
Defined Benefit Plan [Table]
Derivative mark-to-market (MTM) receivables/payables
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Curtailment/settlement impact
Accumulated Defined Benefit Plans Adjustment, Curtailment and Settlement, Attributable To Parent [Member]
Accumulated Defined Benefit Plans Adjustment, Curtailment and Settlement, Attributable To Parent
Entity Filer Category
Entity Filer Category
Dividend income
Dividend Income, Operating
Credit Derivative by Maturity [Axis]
Credit Derivative by Maturity [Axis]
Credit derivative by maturity period.
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Purchased
Long [Member]
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, active
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)
State And Municipal, Foreign Government, Corporate And Other Debt Securities
State And Municipal, Foreign Government, Corporate And Other Debt Securities [Member]
State And Municipal, Foreign Government, Corporate And Other Debt Securities
Loss on sale, before tax
Loss on revenue, before tax
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax
Measurement Input, Discounted Cash Flow
Measurement Input, Discounted Cash Flow [Member]
Measurement Input, Discounted Cash Flow
Other real estate owned
Real Estate Acquired Through Foreclosure
Balance Sheet Location [Axis]
Statement of Financial Position Location, Balance [Axis]
Entity Address, Address Line One
Entity Address, Address Line One
Long-duration insurance contracts
OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment and Tax, Parent
Citigroup's accumulated other comprehensive income (loss)
Accumulated other comprehensive income (loss)
AOCI Attributable to Parent [Member]
Securities sold, not yet purchased
Financial Instruments Sold, Not yet Purchased, at Fair Value
Investments [Domain]
Investments [Domain]
Income before taxes
Disposal Group, Including Discontinued Operation, Operating Income (Loss)
Ownership [Axis]
Ownership [Axis]
Internal Credit Assessment [Domain]
Internal Credit Assessment [Domain]
Funded and Unfunded Exposure
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure [Abstract]
Trading account assets, pledged to creditors
Debt Securities, Trading, Restricted
Financing Receivable, Impaired [Line Items]
Financing Receivable, Impaired [Line Items]
Operating expenses, before tax
Discontinued Operation, Operating Expenses of Discontinued Operation, before Income Tax
Discontinued Operation, Operating Expenses of Discontinued Operation, before Income Tax
Schedule of long-term debt
Schedule of Long-Term Debt Instruments [Table Text Block]
Compensation and benefits
Labor and Related Expense
Mortgage securitizations - Non-agency-sponsored
Non-agency-sponsored mortgage securitizations
Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Other employee plans (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements
DEPOSITS
Deposit Liabilities Disclosures [Text Block]
Mexico and Asia Exit Markets
Mexico and Asia Exit Markets [Member]
Mexico and Asia Exit Markets
Title
Trading Arrangement, Individual Title
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Depositary Shares, each representing a 1/1,000th interest in a share of 6.250% Noncumulative Preferred Stock, Series II
Depositary Shares, each representing a 1/1,000th interest in a share of 6.250% Noncumulative Preferred Stock, Series II [Member]
Depositary Shares, each representing a 1/1,000th interest in a share of 6.250% Noncumulative Preferred Stock, Series II
Loans:
Loans, net of unearned income
Financing Receivable, after Allowance for Credit Loss [Abstract]
Amortized cost
Debt Securities, Available for Sale, Amortized Cost, Excluding Accrued Interest, Before Allowance for Credit Loss, Excluding Unallocated Portfolio Layer Adjustments
Debt Securities, Available for Sale, Amortized Cost, Excluding Accrued Interest, Before Allowance for Credit Loss, Excluding Unallocated Portfolio Layer Adjustments
Credit Risk Derivatives
Credit Risk Derivatives, at Fair Value, Net [Abstract]
Trading account liabilities
Interest Expense, Trading Liabilities
CGMHI
Subsidiary Issuer [Member]
Advances to subsidiaries
Advances To Subsidiaries
Advances to Subsidiaries
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Schedule of gross and net resale agreements and securities borrowing agreements and the related offsetting amount permitted as well as not permitted under ASC 210-20-45
Offsetting Assets [Table Text Block]
All Award Types
Award Type [Domain]
Noncontrolling interests
Equity, Attributable to Noncontrolling Interest
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Operating expenses, after tax
Discontinued Operation, Operating Expenses of Discontinued Operation, after Income Tax
Discontinued Operation, Operating Expenses of Discontinued Operation, after Income Tax
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Canada
CANADA
Notionals, protection purchased
Credit Derivatives Notional Amount Purchased Credit Protection
Credit Derivatives Notional Amount Purchased Credit Protection
Acquisitions/renewals/ divestitures
Intangible Assets, Excluding Mortgage Servicing Rights Acquisitions (Divestitures)
Intangible Assets, Excluding Mortgage Servicing Rights Acquisitions (Divestitures)
Aggregate unpaid principal balance in excess of fair value for non-accrual loans or loans more than 90 days past due
Fair Value Option Loans held as Assets Aggregate Amount in Nonaccrual Status or 90 Days or More Past Due
This item represents the aggregate fair value of loans held as assets for which the fair value option has been elected that are in nonaccrual status, if the entity's policy is to recognize interest income separately from other changes in fair value, or that are 90 days or more past due.
Foreign exchange risks
Foreign exchange contracts
Foreign exchange contracts (gross)
Foreign Exchange Contract [Member]
Provisions for credit losses and for benefits and claims
Provision for Loan, Lease, and Other Losses [Abstract]
Revenue recognized
Contract with Customer, Liability, Revenue Recognized
Non-accrual loans for which there is an ACLL
Financing Receivable, Excluding Accrued Interest, Nonaccrual, With Related Allowance
Financing Receivable, Excluding Accrued Interest, Nonaccrual, With Related Allowance
Trading account liabilities
Trading Liabilities [Member]
Amortized cost, after 1 but within 5 years
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five
Foreign exchange linked
Foreign Exchange Linked [Member]
Represents information pertaining to foreign exchange linked of certain structured liability.
Maximum exposure to loss in significant unconsolidated VIEs
Variable Interest Entity, Primary And Not Primary Beneficiary, Maximum Loss Exposure Amount
Variable Interest Entity, Primary And Not Primary Beneficiary, Maximum Loss Exposure Amount
Less: Dividends and undistributed earnings allocated to employee restricted and deferred shares with rights to dividends, and other relevant items, applicable to basic EPS
Income Allocated to Employee Restricted and Deferred Shares that Contain Nonforfeitable Rights to Dividends
This element represents the income allocated to employee restricted and deferred shares that contain nonforfeitable rights to dividends.
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due [Line Items]
Discontinued operations
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Measurement Input, Appraised Value [Member]
Measurement Input, Appraised Value [Member]
Accumulated other comprehensive income (loss) (AOCI)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Purchases, assets
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases
Schedule of pretax change in accumulated other comprehensive income (loss) from cash flow hedges
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Maximum exposure to loss in significant unconsolidated VIEs, debt investments
Variable Interest Entity Debt Investments Funded Maximum Exposure to Loss
This element represents the maximum funded exposure to loss in a significant unconsolidated variable interest entity, related to debt investments.
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Interest rate futures and forwards
Interest Rate Future and Forward [Member]
Interest Rate Future and Forward [Member]
Minimum
Minimum [Member]
Net interest income after provision for credit losses on loans
Interest Income (Expense), after Provision for Loan Loss
Securitized credit card receivables
Securitized Credit Card Receivables [Line Items]
Liability FVA
Derivative Funding Valuation Adjustment, Derivative Liabilities
Derivative Funding Valuation Adjustment, Derivative Liabilities
Company Selected Measure Name
Company Selected Measure Name
Home equity line of credit (post-reset)
Home Equity Line Of Credit (Post-Reset) [Member]
Home Equity Line Of Credit (Post-Reset) [Member]
Equity volatility
Measurement Input, Equity Volatility [Member]
Measurement Input, Equity Volatility [Member]
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Schedule of Finite and Indefinite-Lived Intangible Assets by Major Class [Table]
Schedule of Finite and Indefinite-Lived Intangible Assets by Major Class [Table]
This element represents the disclosure of intangible assets excluding goodwill by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of the company.
Long-duration insurance contracts
AOCI, Liability for Future Policy Benefit, Parent [Member]
Stockholders' Equity Note [Abstract]
Schedule of Assets Sold under Agreements to Repurchase [Table]
Asset Sold under Agreement to Repurchase [Table]
Goodwill
Goodwill [Roll Forward]
Change in accumulated other comprehensive income (loss), pretax
Increase (Decrease) in Accumulated Other Comprehensive (Loss) Income Before Tax [Roll Forward]
Gross and net resale agreements and securities borrowing agreements and the related offsetting amount permitted under ASC 210-20-45
Offsetting Assets [Abstract]
Within 1 year
Credit Derivative Maturities Next Rolling Twelve Months [Member]
Represents the credit derivatives maturing in the next rolling twelve months following the latest balance sheet presented.
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract]
Document Transition Report
Document Transition Report
Ownership interests in principal amount of trust credit card receivables
Ownership Interests in Principal Amount of Trust Credit Card Receivables [Abstract]
Underlying Securities
Award Underlying Securities Amount
Services
Services [Member]
Services
Equity Component [Domain]
Equity Component [Domain]
Measurement Input, Commodity Correlation [Member]
Measurement Input, Commodity Correlation [Member]
Measurement Input, Commodity Correlation [Member]
Unallocated portfolio layer cumulative basis adjustments
Unallocated portfolio layer cumulative basis adjustments
Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Fair Value, Cumulative Increase (Decrease)
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Amount of designated hedged items
Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Amount
Document Type
Document Type
Level 3
Fair Value, Inputs, Level 3 [Member]
Advertising and marketing
Marketing and Advertising Expense
Collateralized long-term advances from Federal Home Loan Bank
Long-Term Federal Home Loan Bank Advances
Revolving line of credit arrangement
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff
Commissions and fees
Revenue from Contract with Customer, Excluding Assessed Tax
Principal transactions revenue
Schedule of Principal Transactions Revenue [Table Text Block]
Net reserve builds (releases)
Financing Receivable, Other Assets, Allowance for Credit Loss, Reserve Builds (Releases), Net
Financing Receivable, Other Assets, Allowance for Credit Loss, Reserve Builds (Releases), Net
Financial Instruments Subject to Mandatory Redemption, Financial Instrument [Domain]
Financial Instruments Subject to Mandatory Redemption, Financial Instrument [Domain]
Global Wealth Management Business
Global Wealth Management Business [Member]
Global Wealth Management Business
Credit Score, FICO [Domain]
Credit Score, FICO [Domain]
Mortgage servicing rights
MSRs
Servicing Contracts [Member]
Indefinite-lived intangible assets
Indefinite-Lived Intangible Assets [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation techniques and inputs
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Stock tendered for payment of withholding taxes
Payment, Tax Withholding, Share-Based Payment Arrangement
Debt-to-Value [Axis]
Debt-to-Value [Axis]
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
Net income allocated to common shareholders for basic EPS
Net Income (Loss) Available to Common Stockholders, Basic
Financial standby letters of credit
Financial Standby Letter of Credit [Member]
Entity Information [Line Items]
Entity Information [Line Items]
Income (loss) from discontinued operations
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax
Past due ratio
Financing Receivable, Percent Past Due
Guarantor Obligations, Nature [Domain]
Guarantor Obligations, Nature [Domain]
Schedule of gains (losses) on derivatives not designated in a qualifying hedging relationship recognized in Other revenue and gains (losses) on fair value hedges
Derivative Instruments, Gain (Loss) [Table Text Block]
Redemption price per depositary share/ preference share (in dollars per share)
Preferred Stock, Redemption Price Per Share
Credit card merchant processing
Credit Card Merchant Processing [Member]
Credit card merchant processing guarantees represent the Company's indirect obligations in connection with the processing of private label and bank card transactions on behalf of merchants.
Allowance for credit losses on other assets
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Non-cash investing activities
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Fair value, after 5 but within 10 years
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10
Change in accumulated other comprehensive income (loss)
Change in accumulated other comprehensive income (loss), after-tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Open and overnight
Maturity Overnight and on Demand [Member]
Consolidation Items [Domain]
Consolidation Items [Domain]
Income (loss) from discontinued operations, net of taxes
Income (loss) from discontinued operations, net of taxes
Income (loss) from discontinued operations, net of taxes
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Unconsolidated VIEs
Variable Interest Entity, Not Primary Beneficiary [Member]
Term extension
Extended Maturity [Member]
Condensed Balance Sheet Statement [Table]
Condensed Balance Sheet Statement [Table]
Gross amounts offset on the Consolidated Balance Sheet
Security Borrowed, Subject to Master Netting Arrangement, Liability Offset
Net realized/unrealized gains (losses) included in principal transactions
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings
Incremental funding commitments with clients
Incremental Funding Commitments with Clients
Represents the amount of incremental funding commitments with clients under conduits.
Principal securitized
Continuing Involvement with Transferred Financial Assets, Principal Amount Securitized During Period
Continuing Involvement with Transferred Financial Assets, Principal Amount Securitized During Period
ROU asset and lease liabilities
Assets And Liabilities, Lessee [Table Text Block]
Assets And Liabilities, Lessee
Gross amounts of recognized liabilities
Security Loaned, Subject to Master Netting Arrangement, before Offset
Premises and equipment, net of depreciation and amortization
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Combination: term extension and payment delay
Extended Maturity And Payment Deferral [Member]
Extended Maturity And Payment Deferral
Securities borrowed and purchased under agreements to resell (including $189,989 and $206,110 as of March 31, 2026 and December 31, 2025, respectively, at fair value), net of allowance
Securities borrowed or purchased under agreements to resell, at fair value
Total, net of allowance
Securities borrowed and purchased under resale agreements
Carrying Value of Federal Funds Sold, Securities Purchased under Agreements to Resell, and Deposits Paid for Securities Borrowed
Series Y
Series Y Preferred Stock [Member]
Series Y Preferred Stock
Korea
KOREA, REPUBLIC OF
Other liabilities, gross
Other Liabilities before Effects of Master Netting Arrangements
This element represents the aggregate of liabilities categorized as other which are not in and of themselves material enough to require separate disclosure, presented on a gross basis even when derivatives and other financial liabilities are subject to master netting arrangements and qualify for net presentation in the statement of financial position.
Present value of future profits
Present Value of Future Profits [Member]
The intangible asset representing the value of the entity's present value of future profits.
Total, net
Carrying Value of Federal Funds Sold, Securities Purchased under Agreements to Resell, and Deposits Paid for Securities Borrowed, before Allowance for Credit Loss
Carrying Value of Federal Funds Sold, Securities Purchased under Agreements to Resell, and Deposits Paid for Securities Borrowed, before Allowance for Credit Loss
Change in other liabilities
Increase (Decrease) in Other Operating Liabilities
Stockholders’ equity
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Allowance for credit losses on HTM debt securities
Allowance for credit losses on HTM debt securities at beginning of period
Allowance for credit losses on HTM debt securities at end of period
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
Entity Current Reporting Status
Entity Current Reporting Status
Receivables [Abstract]
Derivatives
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Derivative [Line Items]
IR normal volatility
Measurement Input, Interest Rate Normal Volatility [Member]
Measurement Input, Interest Rate Normal Volatility [Member]
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Collateral [Axis]
Collateral Held [Axis]
Consolidated Entities [Domain]
Consolidated Entities [Domain]
Derivative payables
Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement
Financial Instrument [Axis]
Financial Instrument [Axis]
Financial Instrument [Axis]
Gain (loss) under mark-to-market approach
Gain (Loss) On Derivatives, Net, Mark To Market Approach
Gain (Loss) On Derivatives, Net, Mark To Market Approach
Price-based
Valuation, Market Approach [Member]
Current Fiscal Year End Date
Current Fiscal Year End Date
Deposits (including $4,375 and $4,222 as of March 31, 2026 and December 31, 2025, respectively, at fair value)
Total deposits
Deposits
Deposits
Interest-bearing deposits in offices outside the U.S. (including $1,232 and $1,142 as of March 31, 2026 and December 31, 2025, respectively, at fair value)
Interest-Bearing Deposit Liabilities, Foreign
Financial institutions
Financial institutions
Financial Institutions [Member]
Represents financing receivables from financial institutions.
Schedule of guarantor obligations
Schedule of Guarantor Obligations [Table Text Block]
Professional services
Professional Fees
Total derivative liabilities
Derivative Liability
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Loan Restructuring Modification [Axis]
Loan Restructuring Modification [Axis]
Does not meet applicable offsetting guidance, assets
Derivative Asset, Not Subject to Master Netting Arrangement
Total
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss
Federal funds sold and securities borrowed and purchased under agreements to resell
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell Gross
The amount shown on an entity's books for federal funds sold and securities borrowed or purchased under agreements to resell, before effects of master netting arrangements.
Equity securities, at fair value
Marketable equity securities
Equity Securities, FV-NI, Current
Condensed Balance Sheet Statements
Condensed Balance Sheet Statements, Captions [Line Items]
Issuance of preferred stock
Proceeds from Issuance of Preferred Stock and Preference Stock
Schedule of Held-to-maturity Securities [Line Items]
Schedule of Held-to-Maturity Securities [Line Items]
Collateralized short-term advances from Federal Home Loan Bank
Federal Home Loan Bank, Advance, Maturity, Year One
Deposits, at fair value
Interest-bearing deposits
Interest-Bearing Deposit Liabilities
Net cash provided by (used in) financing activities of continuing operations
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Investment grade
External Credit Rating, Investment Grade [Member]
Valuation Approach and Technique [Axis]
Valuation Approach and Technique [Axis]
Finite and Indefinite-lived Intangible Assets
Finite and Indefinite-lived Intangible Assets [Line Items]
Net actuarial loss
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Schedule of pretax gains (losses) related to changes in CVA, FVA, and DVA
Schedule of Pretax Gains (Losses) Related to Changes in Credit Valuation Adjustments, Funding Valuation Adjustment, and Debt Valuation Adjustments [Table Text Block]
Schedule of Pretax Gains (Losses) Related to Changes in Credit Valuation Adjustments, Funding Valuation Adjustment, and Debt Valuation Adjustments [Table Text Block]
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Trust Preferred Securities
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Securities loaned and sold under agreements to repurchase (including $232,048 and $199,422 as of March 31, 2026 and December 31, 2025, respectively, at fair value)
Securities loaned or sold under agreements to repurchase, at fair value
Total, net
Securities loaned and sold under repurchase agreements
Carrying Value of Federal Funds Purchased, Securities Sold under Agreements to Repurchase, and Deposits Received for Securities Loaned
Entity Tax Identification Number
Entity Tax Identification Number
Cash flow
Valuation Technique, Discounted Cash Flow [Member]
Three years prior
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff
Schedule of consolidated and unconsolidated VIEs with which the Company holds significant variable interests
Schedule of Variable Interest Entities [Table Text Block]
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default
Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset
Mortgage servicing rights, at fair value
Gross carrying amount, Mortgage servicing rights (MSRs)
Mortgage Servicing Rights M S R Gross Carrying Amount
This element represents the gross carrying amount of mortgage servicing rights (MSRs) as of the balance sheet date.
Commercial
Commercial and other
Commercial Mortgage-Backed Securities [Member]
GOODWILL AND INTANGIBLE ASSETS
Goodwill and Intangible Assets Disclosure [Text Block]
Allowance for credit losses
Allowance for Loan and Lease Losses [Roll Forward]
Schedule of goodwill
Schedule of Goodwill [Table Text Block]
Trading Arrangement:
Trading Arrangement [Axis]
Aggregate unpaid principal balance in excess of (less than) fair value
Fair Value, Option, Aggregate Differences, Loans and Long-Term Receivables
Net realized/unrealized gains (losses) included in principal transactions, liabilities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings
Schedule of information about loan delinquencies and liquidation losses for assets held in non-consolidated, non-agency-sponsored securitization entities
Assets that Continue to be Recognized, Transferred Financial Assets and Other Financial Assets Managed Together [Table Text Block]
All Other
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Securities purchased under agreements to resell
Net amounts of assets included on the Consolidated Balance Sheet
Securities Purchased under Agreements to Resell
Grupo Financeiro Banamex
Grupo Financeiro Banamex [Member]
Grupo Financeiro Banamex
Mortgage-backed securities
Collateralized Mortgage-Backed Securities [Member]
Preferred dividends
Less: Preferred dividends
Dividends, Preferred Stock
Financing Receivable, Other Assets, Allowance For Credit Loss [Table]
Financing Receivable, Other Assets, Allowance For Credit Loss [Table]
Financing Receivable, Other Assets, Allowance For Credit Loss [Table]
Recovery rate
Measurement Input, Recovery [Member]
Measurement Input, Recovery [Member]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Indefinite-Lived Intangible Assets, Major Class Name [Domain]
Operating expenses
Operating Expenses [Abstract]
Gross amounts of recognized assets
Security Borrowed, Subject to Master Netting Arrangement, before Offset
Held-to-maturity debt securities, pledged to creditors
Debt Securities, Held-to-Maturity, Restricted
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Fair Value Measurement Inputs and Valuation Techniques [Table]
Fair Value Measurement Inputs and Valuation Techniques [Table]
Measurement Input, Recovery Rate [Member]
Measurement Input, Recovery Rate [Member]
Measurement Input, Recovery Rate [Member]
Trading account liabilities
Trading Liabilities
Change in cash, due from banks and deposits with banks
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation
Gross amounts offset on the Consolidated Balance Sheet
Federal funds sold and securities borrowed and purchased under agreements to resell, Netting
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, Liability Offset
Total excluding portfolio-layer hedges cumulative basis adjustments
Financing Receivable, Excluding Accrued Interest and Portfolio Layer Basis Adjustment, before Allowance for Credit Loss
Financing Receivable, Excluding Accrued Interest and Portfolio Layer Basis Adjustment, before Allowance for Credit Loss
Guarantor Obligations
Guarantor Obligations [Line Items]
Derivative notionals
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Other Trading Assets
Other Trading Assets [Member]
Other Trading Assets
Summarized balance sheet
Condensed Balance Sheet [Table Text Block]
Amortized cost
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss
Short-term borrowings
Short-Term Debt, Fair Value
Market value of retained interest related to re-securitization transaction
Market Value of Interest in Private Label Re Securitization Entities Related to Current Period
This element represents the amount of market value of interest owned by the entity in private-label re-securitization entities, for current period.
Interest income recognized
Financing Receivable, Nonaccrual, Interest Income
Total
Securitized Credit Card Receivables Principal Amount Outstanding
This element represents the principal amount of credit card receivables held in trusts.
Other real estate owned
Real Estate Acquired in Satisfaction of Debt [Member]
Asset Class [Axis]
Asset Class [Axis]
Total
Offsetting Securities Purchased Under Agreements to Resell and Deposits Paid for Securities Borrowed [Abstract]
Available-for-sale securities, pledged to creditors
Debt Securities, Available-for-Sale, Restricted
Valuation Approach and Technique [Domain]
Valuation Approach and Technique [Domain]
Leases [Abstract]
Non-accrual loans for which there is no ACLL
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance
Disposal Groups, Including Discontinued Operations
Disposal Groups, Including Discontinued Operations [Table Text Block]
Transfers into Level 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3
Gross unrealized losses
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax
Classified based on internal and external credit ratings
Classified Based on Internal and External Credit Ratings [Member]
Classified Based on Internal and External Credit Ratings
Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Net income (in dollars per share)
Earnings Per Share, Basic
Delinquency-managed loans
Delinquency Managed Loans [Member]
Delinquency Managed Loans
Financing Receivable, Nonaccrual [Table]
Financing Receivable, Nonaccrual [Table]
Principal amount of loans and other financial instruments
Continuing Involvement with Continued to be Recognized Transferred Financial Assets, Amount Outstanding
Gross amounts of recognized assets
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, before Offset
Other, net
Financing Receivable, Other Assets, Allowance For Credit Loss, Other Changes, Net
Financing Receivable, Other Assets, Allowance For Credit Loss, Other Changes, Net
Income (loss) from discontinued operations, net of taxes (in dollars per share)
Discontinued operations (in dollars per share)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share
Gross unrealized gains
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain
All other
Corporate Debt Asset Backed and Other Debt Securities [Member]
Represents information in the aggregate pertaining to corporate debt securities, asset-backed securities, and other debt securities not otherwise defined.
Unrealized gains (losses) still held, assets
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)
Items measured at fair value of a nonrecurring basis
Fair Value Measurements, Nonrecurring [Table Text Block]
Total
Total
Gross credit losses on loans
Charge-offs
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff
Amortization
Intangible Assets, Excluding Mortgage Servicing Rights Amortization of Intangible Assets
This element represents the aggregate amount of amortization of intangible assets excluding mortgage servicing rights (MSRs) during the period.
Proceeds from sales of premises and equipment and repossessed assets
Proceeds from Sale of Productive Assets
Net amounts
Security Purchased under Agreement to Resell, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Excise tax on share repurchases
Share Repurchase Program, Excise Tax
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]
Accounts and Financing Receivables [Table]
Trading account assets (including $258,990 and $228,816 pledged to creditors as of March 31, 2026 and December 31, 2025, respectively)
Trading account assets
Trading account assets
Debt Securities, Trading, and Equity Securities, FV-NI
Derivative gain (losses)
Derivative Instruments, Gain (Loss) [Line Items]
Coupon rate
Trust Preferred Securities Coupon Rate
This element represents the coupon rate of the trust preferred securities.
Short-term borrowings and other interest-bearing liabilities
Interest Expense, Short-Term Borrowings Excluding Federal Funds and Securities Sold under Agreements to Repurchase
Hedging Designation [Domain]
Hedging Designation [Domain]
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Abstract]
FX translation and other
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Foreign Currency Translation Gain (Loss)
Portfolio-layer cumulative basis adjustments, amortized cost
Hedged Asset, Amortized Cost, Portfolio Layer Method, Hedged Layer
Hedged Asset, Amortized Cost, Portfolio Layer Method, Hedged Layer
Credit cards
Credit Card [Member]
Trading liabilities
Trading Liabilities, Fair Value Disclosure
Schedule of Credit Derivatives [Table]
Credit Derivative [Table]
Treasury stock, at cost
Treasury Stock, Common [Member]
Fair value measurements additional disclosures
Fair Value Additional Disclosures [Abstract]
Lease liability
Operating Lease, Liability
Mortgage receivable
Mortgage Receivable [Member]
Measurement alternative—downward changes for observable prices
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount
Other financial assets
Other financial assets
Other Financial Assets Including Non Trading Derivatives [Member]
Represents the aggregate of financial assets not separately disclosed in the balance sheet. Includes nontrading derivative assets.
Equal to and greater than 90 days past due and accruing
90+ days past due
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Liabilities
Liabilities [Abstract]
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount [Abstract]
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount [Abstract]
Aggregate unpaid principal balance in excess of (less than) fair value
Fair Value Option Aggregate Differences Short Term Debt Instruments
This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of short-term debt instruments that have contractual principal amounts and for which the fair value option has been elected.
Net credit losses (NCLs) on loans
Replenishment of NCLs
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)
Trading Activity, by Type [Domain]
Trading Activity, by Type [Domain]
Gain (loss) on the hedged item in designated and qualifying fair value hedges
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge
Schedule of pretax and after-tax changes in each component of accumulated other comprehensive income (loss)
Schedule of Before and after Tax Changes in Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Tabular disclosure of the pre-tax and after-tax changes in each component of accumulated other comprehensive income (loss).
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Company Selected Measure Amount
Company Selected Measure Amount
Measurement Input Type [Axis]
Measurement Input Type [Axis]
Disposal Group Name [Domain]
Disposal Group Name [Domain]
Fair value, due within 1 year
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One
Variable Interest Entity, Type [Domain]
Variable Interest Entity, Type [Domain]
Variable Interest Entity, Type
Proceeds from maturities of investments
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual [Line Items]
Securities borrowed
Securities Borrowed [Abstract]
Pretax change in accumulated other comprehensive income (loss)
Summary of Derivative Instruments by Hedge Designation [Abstract]
Total ACL
Total ACL
Financing Receivable, Off-Balance Sheet Liability, Other Assets, And HTM Debt Securities, Allowances For Credit Loss
Financing Receivable, Off-Balance Sheet Liability, Other Assets, And HTM Debt Securities, Allowances For Credit Loss
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default
Security Loaned, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset
Brokerage receivables, net of allowance
Brokerage Receivables
Amount due from customers, brokers, dealers, and clearing organizations related to the entity's brokerage activities and operations. The amount due from customers are for fees and charges arising from transactions related to brokerage activities and operations. The amount receivable from brokers, dealers, and clearing organizations may include receivables for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage items; and would also include cash and securities [guarantee] on deposit with [commodities] clearing organizations and other entities which provide services necessary to operations of the Company.
Securities loaned
Securities lending agreements
Securities Loaned, Gross Including Not Subject to Master Netting Arrangement
Netting, Liabilities, total of netting agreements and cash collateral received
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset
Legal Entity [Axis]
Legal Entity [Axis]
Carried at cost
Portion at Other than Fair Value Measurement [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Credit Quality Indicator [Line Items]
Credit Derivatives Contract Type [Axis]
Credit Derivatives Contract Type [Axis]
External Credit Rating by Grouping [Domain]
External Credit Rating by Grouping [Domain]
Receivable Type [Axis]
Receivable Type [Axis]
Proceeds from sales and securitizations of loans
Proceeds from Sale, Loan and Lease, Held-for-Investment
Subsidiary Holding Company
Subsidiary Holding Company [Member]
Subsidiary Holding Company
Debt Securities Specifically Hedged
Debt Securities Specifically Hedged [Member]
Debt Securities Specifically Hedged
Assets, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure [Abstract]
Notional amount
Junior Subordinated Debentures Owned by Trust Proceeds Received from Trust at Issuance
This element represents the proceeds received from the trust at the date of issuance of the junior subordinated debentures to the trust.
Variable Interest Entity
Variable Interest Entity [Line Items]
Credit Score, FICO [Axis]
Credit Score, FICO [Axis]
Common dividends declared (in dollars per share)
Common Stock, Dividends, Per Share, Declared
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale [Line Items]
Level 2
Fair Value, Inputs, Level 2 [Member]
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
Net loss (gain) on sale of significant disposals
Loss on sale of disposals
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal
Residential mortgages
Residential Mortgage [Member]
NCLs on other assets
Financing Receivable, Other Assets, Allowance For Credit Loss, Net Credit Loss
Financing Receivable, Other Assets, Allowance For Credit Loss, Net Credit Loss
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, de-designated
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)
Commercial real estate, construction and land development
Commercial Real Estate Construction and Land Development [Member]
Commercial real estate, construction and land development include unused portions of commitments to extend credit for the purpose of financing commercial and multifamily residential properties as well as land development projects. Both secured-by-real-estate and unsecured commitments are included, as well as undistributed loan proceeds, where there is an obligation to advance for construction progress payments.
Purchased credit deteriorated
Financial Asset Acquired with Credit Deterioration [Member]
Combination: interest rate reduction, term extension and payment delay
Extended Maturity, Interest Rate Reduction and Payment Deferral [Member]
Extended Maturity, Interest Rate Reduction and Payment Deferral
Share-based Payment Arrangement [Abstract]
Share-Based Payment Arrangement [Abstract]
Income Statement [Abstract]
Income Statement [Abstract]
Payments and redemptions of long-term debt
Repayment of Long-Term Debt, Long-Term Lease Obligation, and Capital Security
Financing Receivable, Modified [Table]
Financing Receivable, Modified [Table]
Provision (release) for credit losses on unfunded lending commitments
Provision (release) for credit losses on ACLUC(2)
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)
Product and Service [Domain]
Product and Service [Domain]
Equity swaps
Equity Swap [Member]
Citigroup stockholders' equity
Parent [Member]
Derivative notionals
Derivative, Notional Amount
Interchange fees
Credit And Bank Card Income, Interchange Fees [Member]
Credit And Bank Card Income, Interchange Fees [Member]
Purchased credit card relationships
Purchased Credit Card Relationships [Member]
This element represents the value of the entity's purchased credit card relationships.
Schedule of allowance for credit losses and investment in loans by portfolio segment
Financing Receivable, Allowance for Credit Loss [Table Text Block]
Mortgage and real estate
Mortgages [Member]
Loans HFS
Loan, Held-for-Sale, Measurement Input
Settlements, liability
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements
Debt valuation adjustment (DVA)
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member]
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Accrued interest receivable
Interest Receivable
Asset FVA
Derivative Funding Valuation Adjustment, Gain (Loss) on Derivative Asset
Derivative Funding Valuation Adjustment, Gain (Loss)
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Net actuarial loss (gain)
Defined Benefit Plan, Amortization of Gain (Loss)
MSR fees
Disclosures Pertaining to Servicing Assets and Servicing Liabilities [Abstract]
Cash flow hedges
Cash Flow Hedging [Member]
Other liabilities, plus allowances
Other liabilities
Other Liabilities
Goodwill
Balance at December 31, 2025
Balance at March 31, 2026
Goodwill
Equity risks
Equity contracts
Equity contracts (gross)
Equity Contract [Member]
Corporate finance
Corporate Finance [Member]
Represents corporate finance services. Fees and commissions earned on corporate finance activity which consists primarily of fees earned from structuring and underwriting loan syndications.
In offices outside North America
In offices outside North America
Outside of U.S.
Non-US [Member]
Total deposits in U.S. offices
Deposits, Domestic
Schedule of long-term debt carried at fair value and short term borrowings, excluding debt issued by consolidated VIEs
Schedule of Fair Value of Long-term Debt And Short Term Borrowings Excluding Debt Issued by Consolidated V I Es [Table Text Block]
Represents the schedule of long-term debt carried at fair value, excluding debt issued by consolidated VIEs.
Total as a percentage of gross liabilities
Percentage of Liabilities to Gross Liabilities
This element represents the percentage of total liabilities to gross liabilities.
BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES
Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]
Weighted average delay in payments
Financing Receivable, Modified, Weighted Average Payment Deferral
Financing Receivable, Modified, Weighted Average Payment Deferral
U.S. Treasury and federal agency securities
US Treasury and Government [Member]
Collectively evaluated
Financing Receivable, Allowance for Credit Loss, Collectively Evaluated
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Restricted cash
Restricted Cash
Redemption of preferred stock
Payments for Repurchase of Preferred Stock and Preference Stock
Entity [Domain]
Entity [Domain]
Allowance for credit losses on securities purchased and borrowed
Carrying Value of Federal Funds Sold, Securities Purchased under Agreements to Resell, and Deposits Paid for Securities Borrowed, Allowance for Credit Loss
Carrying Value of Federal Funds Sold, Securities Purchased under Agreements to Resell, and Deposits Paid for Securities Borrowed, Allowance for Credit Loss
Net cash provided by (used in) investing activities of continuing operations
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
Schedule of Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Axis]
Schedule of Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Axis]
Other, net
Debt Securities, Held-To-Maturity, Excluding Accrued Interest, Allowance For Credit Loss, Other Changes, Net
Debt Securities, Held-To-Maturity, Excluding Accrued Interest, Allowance For Credit Loss, Other Changes, Net
Document Fiscal Year Focus
Document Fiscal Year Focus
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Liquidation value
Trust Preferred Securities Liquidation Value
This element represents the notional value received by investors from the trusts at the time of issuance.
Cash Flows Between Transferor and Transferee
Cash Flows Between Transferor and Transferee [Abstract]
Yield analysis
Valuation Technique, Yield Analysis [Member]
Valuation Technique, Yield Analysis
Exchange traded
Exchange Traded [Member]
Change in trading account liabilities
Increase (Decrease) in Trading Liabilities
Carrying value
Carrying amount
Reported Value Measurement [Member]
Held-to-maturity Securities, Debt Maturities, Fair Value;
Debt Securities, Held-to-Maturity, Fair Value, Maturity [Abstract]
In North America offices
North America [Member]
Measurement alternative—upward changes for observable prices
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount
Series JJ
Series JJ Preferred Stock [Member]
Series JJ Preferred Stock
Realized gains from sales of investments
Debt and Equity Securities, Gain (Loss)
REPORTABLE BUSINESS SEGMENTS AND ALL OTHER
Segment Reporting Disclosure [Text Block]
Schedule of Goodwill [Table]
Goodwill [Table]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Items Measured at Fair Value on a Nonrecurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives instruments not designated as ASC 815 hedges
Not Designated as Hedging Instrument [Member]
U.S. Treasury
U.S. treasury securities
US Treasury Securities [Member]
SUBSIDIARY GUARANTEES
Condensed Financial Statements [Text Block]
Components of net (benefit) expense
Schedule of Net Benefit Costs [Table Text Block]
Other
Other debt securities
Other Debt Obligations [Member]
Cash flow hedges
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Loans
Loans Receivable [Member]
Total trading derivatives and cash collateral, liability
Derivative Fair Value of Derivative Liability and Derivative Collateral Right to Reclaim Cash Net
Represents the aggregate of the fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position, and the amount of the obligation to return cash collateral net of the amount offset against net derivative instrument positions under master netting arrangements.
Gross amount of liabilities associated with repurchase agreements and securities lending agreements
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block]
Redemption of preferred stock
Stock Redeemed or Called During Period, Value
SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]
Average loans
Financing Receivable, after Allowance for Credit Loss, Average Outstanding Amount
Financing Receivable, after Allowance for Credit Loss, Average Outstanding Amount
Segments [Axis]
Segments [Axis]
Fair Value by Liability Class [Domain]
Fair Value by Liability Class [Domain]
Local Phone Number
Local Phone Number
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Other, net
Payment for (Proceeds from) Other Investing Activity
Total liabilities
Liability [Member]
Up to 30 days
Maturity Less than 30 Days [Member]
Allowance for credit losses on unfunded commitments (ACLUC) at beginning of period
ACLUC at end of period
Allowance for credit losses on unfunded commitments (ACLUC)
Off-Balance-Sheet, Credit Loss, Liability
7.875% Fixed Rate / Floating Rate Trust Preferred Securities (TruPS®) of Citigroup Capital XIII (and registrant’s guaranty with respect thereto)
Seven Point Eight Seven Five Percent Fixed Rate / Floating Rate Trust Preferred Securities Of Citigroup Capital XIII [Member]
Seven Point Eight Seven Five Percent Fixed Rate / Floating Rate Trust Preferred Securities Of Citigroup Capital XIII [Member]
Not rated
External Credit Rating Not Rated [Member]
Represents credit derivatives and guarantee obligations which have not been rated for payment and performance risk.
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Other Commitments [Axis]
Other Commitments [Axis]
Assets of consolidated VIEs to be used to settle obligations of consolidated VIEs
Variable Interest Entity, Asset [Abstract]
Variable Interest Entity, Asset
Service-related expense
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest-bearing deposits in U.S. offices (including $1,695 and $1,862 as of March 31, 2026 and December 31, 2025, respectively, at fair value)
Interest-Bearing Deposit Liabilities, Domestic
FAIR VALUE MEASUREMENT
Fair Value Disclosures [Text Block]
RETIREMENT BENEFITS
Retirement Benefits [Text Block]
Loan modifications to borrowers experiencing financial difficulty
Financing Receivable, Modified [Table Text Block]
Investment, Name [Axis]
Investment, Name [Axis]
Loans net of unearned income, before adjustments
Loans net of unearned income, before adjustments
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss and Adjustments
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss and Adjustments
Changes in total nonrecurring fair value measurements
Fair Value Assets Measured on Nonrecurring Basis Changes [Table Text Block]
Tabular disclosure of total nonrecurring fair value measurements for the period, included in earnings, attributable to the change in fair value relating to assets that are still held as of the reporting date.
Credit spread
Measurement Input, Credit Spread [Member]
Common shares issued to parent (in shares)
Subsidiary Trust Common Shares Issued to Parent
This element represents the common shares issued by subsidiary trust to parent.
Cash and due from banks
Cash And Due From Banks [Member]
Cash And Due From Banks [Member]
Federal funds purchased and securities loaned and sold under agreements to repurchase, Gross
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase Gross
This item represents the amount that a bank with insufficient reserves at a Federal Reserve Bank borrows, at the federal funds rate, from another bank to meet its reserve requirements for that day and the amount of securities that an institution sells and agrees to repurchase at a specified date for a specified price, before effects of master netting arrangements.
Trading derivatives, asset, Gross
Derivative Asset, Subject to Master Netting Arrangement, before Offset
Commitments to lend
Financing Receivable, Modified, Commitment to Lend
Entity Registrant Name
Entity Registrant Name
Cash flow hedge gain expected to be reclassified from AOCI within 12 months
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months
Total net expense (benefit)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Total liabilities
Disposal Group, Including Discontinued Operation, Liabilities
Interest rate
Measurement Input, Interest Rate [Member]
Measurement Input, Interest Rate [Member]
Loans (net of allowance of $24 at March 31, 2026)
Disposal Group, Including Discontinued Operation, Financing Receivable
Disposal Group, Including Discontinued Operation, Financing Receivable
INCENTIVE PLANS
Disclosure of Compensation Related Costs Share Based Payments and Cash Awards [Text Block]
The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. Also includes disclosure for deferred cash awards and other cash incentive awards.
Interest rate linked
Interest Rate Linked [Member]
Represents information pertaining to interest rate linked of certain structured liability.
Fiduciary fees
Fiduciary Fees [Member]
Fiduciary Fees [Member]
Poland Consumer Banking Business
Poland Consumer Banking Business [Member]
Poland Consumer Banking Business
Total CVA, DVA and FVA
Credit, Funding, and Debt Valuation Adjustment, Gain (Loss)
Credit, Funding, and Debt Valuation Adjustment, Gain (Loss)
Past Due
Financial Asset, Past Due [Member]
Number of operating segments
Number of Operating Segments
Asset FVA
Derivative Funding Valuation Adjustment, Derivative Assets
Derivative Funding Valuation Adjustment, Derivative Assets
Gross amounts of recognized assets
Securities Purchased under Agreements to Resell Securities Borrowed Gross
Amount, before effects of master netting arrangements, of securities purchased under agreements to resell and securities borrowed.
Related and Nonrelated Parties [Axis]
Related and Nonrelated Parties [Axis]
Interest cost on benefit obligation
Defined Benefit Plan, Interest Cost
Restatement Determination Date:
Restatement Determination Date [Axis]
Medium-Term Senior Notes, Series N, Floating Rate Notes Due September 17, 2026 of CGMHI
Medium-Term Senior Notes, Series N, Floating Rate Notes Due September 17, 2026 of CGMHI [Member]
Medium-Term Senior Notes, Series N, Floating Rate Notes Due September 17, 2026 of CGMHI
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Loss on sale after tax
Loss on revenue, after tax
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax
Gross amounts offset on the Consolidated Balance Sheet
Securities Sold under Agreements to Resell Securities Loaned Asset
Amount of asset associated with securities sold under agreements to repurchase and securities loaned.
Increase (decrease) due to amounts reclassified from AOCI
Total amounts reclassified out of AOCI, after-tax
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Name
Trading Arrangement, Individual Name
Total loans defaulted within one year of modification
Financing Receivable, Modified, Subsequent Default
U.S. government-sponsored agency guaranteed
Mortgage securitizations - U.S. agency-sponsored
U.S. government-sponsored agency guaranteed
Mortgage Backed Securities Issued by US Government Corporations and Agencies [Member]
Debt securities collateralized by real estate mortgage loans (mortgages), issued by US Government Corporations and Agencies, such as Government National Mortgage Association (Ginnie Mae) and by the Federal National Mortgage Association (Fannie Mae) and the Federal Home Loan Mortgage Corporation (Freddie Mac).
Deposit Liability [Line Items]
Deposit Liability [Line Items]
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Preferred stock at aggregate liquidation value
Preferred Stock [Member]
Other
Other Products And Services [Member]
Other Products And Services [Member]
Employee and Directors Stock Options
Employee and Directors Stock Options [Member]
An arrangement whereby an employee or member of the Board of Directors is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement.
Net amounts
Security Sold under Agreement to Repurchase, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Credit Loss [Abstract]
Non-marketable equity securities measured using the measurement alternative
Investments measured at net asset value excluded from Level 3
Alternative Investment
Measurement alternative—impairment losses
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount
Liability Class [Axis]
Liability Class [Axis]
Credit Loss Status [Domain]
Credit Loss Status [Domain]
Income Statement Location [Axis]
Statement of Income Location, Balance [Axis]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Repurchase Agreements and Similar Transactions, Maturity Periods [Domain]
Repurchase Agreements and Similar Transactions, Maturity Periods [Domain]
Gross amounts offset on the Consolidated Balance Sheet
Security Loaned, Subject to Master Netting Arrangement, Asset Offset
Assets
Derivative Asset [Abstract]
Schedule of allowance for credit losses on other assets
Financing Receivable, Other Assets, Allowance for Credit Loss [Table Text Block]
Financing Receivable, Other Assets, Allowance for Credit Loss [Table Text Block]
Interest expense
Interest Expense, Operating and Nonoperating [Abstract]
Purchases of investments
Payments to Acquire Debt Securities, Available-for-Sale
Preferred stock ($1.00 par value; authorized shares: 30 million), issued shares: as of March 31, 2026—782,000 and as of December 31, 2025—802,000, at aggregate liquidation value
Carrying value
Preferred Stock, Value, Issued
Series FF
Series FF Preferred Stock [Member]
Series FF Preferred Stock
Installment and other
Installment And Other [Member]
Represents financing receivables classified as installment, revolving credit and other.
Loan interest, including fees
Interest and Fee Income, Loans and Leases
Realized gains and losses on investments excluding other-than-temporary impairment
Realized Gain (Loss) on Investments [Table Text Block]
Federal funds purchased and securities loaned and sold under agreements to repurchase
Securities loaned and sold under agreement to repurchase
Securities loaned and sold under agreements to repurchase
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure
Trading account assets
Interest Income, Debt Securities, Trading, Operating
660 to 739
FICO Score, 660 to 739 [Member]
FICO Score, 680 to 760 [Member]
Credit card contract related intangibles
Contract-Based Intangible Assets [Member]
Schedule of financial instruments selected for changes in fair value gains and losses
Schedule of Financial Instruments Selected for Fair Value Accounting [Table Text Block]
Represents the schedule of financial instruments along with their fair value positions, selected for fair value accounting. Also includes disclosure of the gains (losses) related to the change in fair value during the period.
Non-marketable equity securities
Non Marketable Equity Securities [Member]
Non Marketable Equity Securities [Member]
Represents a security that is difficult to buy or sell because it does not trade on a normal market or exchange. Such securities may trade over the counter (OTC) or in a private transaction.
Amount sold (in shares)
Disposal Group, Amount Sold, Shares
Disposal Group, Amount Sold, Shares
Gross credit losses
Financing Receivable, Excluding Accrued Interest, Modified, Credit Loss Expense (Reversal)
Financing Receivable, Excluding Accrued Interest, Modified, Credit Loss Expense (Reversal)
Noncontrolling interests
Noncontrolling Interest [Member]
Restricted Cash and Cash Equivalent Item [Line Items]
Restricted Cash and Cash Equivalent Item [Line Items]
Recovery analysis
Recovery Analysis Valuation Technique [Member]
Recovery analysis valuation technique used to measure fair value.
Mortgage loans in process of foreclosure (less than)
Mortgage Loans in Process of Foreclosure, Amount
Short-term Debt [Line Items]
Short-Term Debt [Line Items]
Net amounts of assets included on the Consolidated Balance Sheet
Carrying Value of Securities Purchased under Agreements to Resell and Deposits Paid for Securities Borrowed
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
Long-term debt, carrying amount of hedged asset/liability
Hedged Liability, Fair Value Hedge
Trust preferred securities
Trust Preferred Securities, Carrying Value
This element represents the carrying values of trust preferred securities.
Diluted earnings per share
Earnings Per Share, Diluted [Abstract]
Total, net unrealized gains (losses)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), Before Tax, Including Cumulative Basis Adjustments
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), Before Tax, Including Cumulative Basis Adjustments
Sold to investors via trust-issued securities
Portion of Principal Amount Outstanding of Securitized Assets and Any Other Financial Assets Managed Together Sold to Investors Via Trust Credit Card Receivables
This element represents the ownership interests in principal amount of trust credit card receivables sold to investors via trust-issued securities.
Series AA
Series AA Preferred Stock [Member]
Series AA Preferred Stock
Net investment hedges
Net Investment Hedging [Member]
Investments [Table]
Investments [Table]
Investments
After 10 years, amortized cost
Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10
All Individuals
All Individuals [Member]
Issuances
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Issues
Long-term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Name
Forgone Recovery, Individual Name
Gain (loss) under amortization approach
Gain (Loss) On Derivatives, Net, Amortization Approach
Gain (Loss) On Derivatives, Net, Amortization Approach
(Gain) loss reclassified from AOCI
Reclassification out of Accumulated Other Comprehensive Income [Member]
Disposal Group Classification [Axis]
Disposal Group Classification [Axis]
From 1 to 5 years
Credit Derivative Maturities Next Rolling Year Two through Five [Member]
Represents the credit derivatives maturing in the second rolling twelve months through the fifth rolling twelve months following the latest balance sheet presented.
SECURITIZATIONS AND VARIABLE INTEREST ENTITIES
Securitizations and Variable Interest Entities [Text Block]
Disclosure related to the entity's use of special purpose entities, its variable interest entities and securitizations.
Accumulated amortization of Intangible assets (excluding MSRs)
Intangible Assets, Excluding Mortgage Servicing Rights Accumulated Amortization
This element represents the accumulated amortization of all intangible assets, excluding goodwill and mortgage servicing rights (MSRs), as of the balance sheet date.
Fair value
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
Four years prior
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff
Other liabilities
Disposal Group, Including Discontinued Operation, Other Liabilities
Debt Securities, Held-to-maturity [Table]
Debt Securities, Held-to-Maturity [Table]
Expire within 1 year
Guarantee Obligations Maximum Exposure Expire within One Year
Represents the maximum potential payments with respect to the entity's guarantees that expire within one year.
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Noncontrolling Interest
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Noncontrolling Interest [Member]
Schedule of asset-based financing
Schedule of Asset Based Financing Unconsolidated V I E [Table Text Block]
This element represents the schedule of asset-based financing of the segment, total assets of the unconsolidated VIEs with significant involvement and the Company's maximum exposure to loss at balance sheet day.
Geographical [Axis]
Geographical [Axis]
Lessee, Lease, Description [Line Items]
Lessee, Lease, Description [Line Items]
Liabilities
Derivative Liability [Abstract]
Transaction Type [Axis]
Transaction Type [Axis]
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Benefit plans liability adjustment
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent
Net specific reserve builds (releases) for loans
Net specific reserve builds (releases)
Financing Receivable, Excluding Accrued Interest, Specific Reserve Builds or Releases, Net
Provision charged or released during the period against earnings for credit losses on loans and leases receivable that are expected and were individually evaluated for impairment.
Cash flows received on retained interests and other net cash flows
Cash Flows Between Transferor and Transferee, Receipts on Transferor's Interest in Transferred Financial Assets, Other
Compensation expense
Operating Expense, Compensation Expense
Operating Expense, Compensation Expense
Non-interest-bearing deposits in offices outside the U.S. (including $1,448 and $1,218 as of March 31, 2026 and December 31, 2025, respectively, at fair value)
Noninterest-Bearing Deposit Liabilities, Foreign
Equity-FX correlation
Measurement Input, Equity Foreign Exchange Correlation [Member]
Measurement Input, Equity Foreign Exchange Correlation
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments
Notional amount
Variable Interest Entity Funding Commitments Unfunded Maximum Exposure to Loss
This element represents the maximum unfunded exposure to loss in a significant unconsolidated variable interest entity, related to funding commitments.
Equity securities (including $759 and $921 as of March 31, 2026 and December 31, 2025, respectively, at fair value)
Non-marketable equity securities measured using the measurement alternative
Non-Marketable Equity Securities
Non-Marketable Equity Securities
Total deposits in offices outside the U.S.
Deposits, Foreign
Disposal Groups, Including Discontinued Operations [Table]
Disposal Groups, Including Discontinued Operations [Table]
FX translation and other
Intangible Assets, Excluding Mortgage Servicing Rights Translation and Purchase Accounting Adjustments
This element represents net changes to the recorded value of intangible assets excluding mortgage servicing rights (MSRs), due to foreign currency translation adjustments and purchase accounting adjustments.
Net changes, net of taxes in Citigroup’s other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Gross credit losses
Financing Receivable, Other Assets, Allowance for Credit Loss, Writeoffs
Financing Receivable, Other Assets, Allowance for Credit Loss, Writeoffs
Advances from subsidiaries
Advances From Subsidiaries
Advances from Subsidiaries
Two years prior
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff
Loan servicing
Loan Servicing [Member]
Represents loan servicing services.
Greater than or equal to 740
FICO Score, Greater Than 740 [Member]
FICO Score, Greater Than 760 [Member]
Total as a percentage of gross assets
Percentage of Assets to Gross Assets
This element represents the percentage of total assets to gross assets.
Effect of dilutive securities
Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract]
Allowance for loan losses disclosures
Financing Receivable, Allowance for Credit Loss [Line Items]
External Credit Rating by Grouping [Axis]
External Credit Rating by Grouping [Axis]
Provision for credit losses on other assets
Total provision for credit losses
Financing Receivable, Other Assets, Credit Loss Expense (Reversal)
Financing Receivable, Other Assets, Credit Loss Expense (Reversal)
Service cost
Defined Benefit Plan, Service Cost
Measurement Frequency [Domain]
Measurement Frequency [Domain]
Other comprehensive income before reclassifications
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Gross amounts of recognized liabilities
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, before Offset
PREFERRED STOCK
Equity [Text Block]
Loan Restructuring Modification [Domain]
Loan Restructuring Modification [Domain]
Total loans, net
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss
Credit linked
Credit Linked [Member]
Represents information pertaining to credit linked of certain structured liability.
Securities issued (in shares)
Trust Preferred Securities Issued
This element represents the number of trust preferred securities issued as of the balance sheet date.
Unsettled reverse repurchase and securities borrowing agreements
Securities Purchased under Agreements to Resell Securities Loaned Gross, Unsettled
Securities Purchased under Agreements to Resell Securities Loaned Gross, Unsettled
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Preferred stock, authorized shares (in shares)
Preferred Stock, Shares Authorized
Treasury stock acquired
Payments for Repurchase of Common Stock
Base Rate
Base Rate [Member]
Reclassifications
Reclassification, Comparability Adjustment [Policy Text Block]
Credit and funding valuation adjustments contra-liability (contra-asset)
Credit and Funding Valuation Adjustments [Abstract]
Credit and Funding Valuation Adjustments [Abstract]
Citi-administered asset-backed commercial paper conduits
Entity Administered Asset Backed Commercial Paper Conduit [Member]
This element represents entity-administered asset-backed commercial paper conduits.
Operating lease term
Lessee, Operating Lease, Term of Contract
Cash flows from financing activities of continuing operations
Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract]
Other
Other Loans [Member]
Represents loans in other types or industries which are not separately disclosed in the balance sheet or notes.
Schedule of gross and net repurchase agreements and securities lending agreements and the related offsetting amount permitted as well as not permitted under ASC 210-20-45
Offsetting Liabilities [Table Text Block]
Loss on sale after tax
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses), Net Of Taxes
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses), Net Of Taxes
Cash collateral available to reimburse losses realized under guarantees and indemnifications
Cash Held as Collateral
Cash held as collateral available to the reporting entity to reimburse losses realized under guarantees and indemnifications.
Total Citigroup common stockholders’ equity
Common Shareholders' Equity [Member]
The amount of stockholders equity attributable to common shareholders.
Percentage of interest in corresponding series of preferred stock
Depositary Share Percentage Of Noncumulative Perpetual Preferred Stock
Percentage Interest In A Series Share Of Non-Cumulative Preferred Stock
Purchases of investments
Payments to Acquire Held-to-Maturity Securities
Class of Stock [Axis]
Class of Stock [Axis]
Loss on sale
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses)
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
31–90 days
Maturity 31 to 90 Days [Member]
Maturity 31 to 90 Days [Member]
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]
Credit Derivative
Credit Derivatives [Line Items]
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Statement [Table]
Statement [Table]
Other revenue
Subtotal, pretax
Other Nonoperating Income (Expense)
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Adjustments to reconcile net income to net cash provided by (used in) operating activities of continuing operations
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]
Other commitments and contingencies
Other Commitments and Contingencies [Member]
Other commitments and contingencies include all other transactions related to commitments and contingencies not separately disclosed in the report.
Banking
Banking Segment [Member]
Banking Segment
Municipal securities tender option bond trusts (TOBs)
Municipal Securities Tender Option Bond Trusts [Member]
Represents the municipal securities tender option bond trusts.
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Amendment Flag
Amendment Flag
Reversal of accrued interest
Financing Receivable, Accrued Interest, Increase (Decrease)
Financing Receivable, Accrued Interest, Increase (Decrease)
Condensed Income Statements
Condensed Income Statements, Captions [Line Items]
Assets before netting
Assets before Effects of Master Netting Arrangements
This element represents the aggregate of the assets reported on the balance sheet at period end, presented on a gross basis even when derivatives and other financial assets are subject to master netting arrangements and qualify for net presentation in the statement of financial position.
Termination Date
Trading Arrangement Termination Date
Transfers to loans HFS (Other assets) from loans HFI
Financing Receivable, Reclassification to Held-for-Sale
Receivable [Domain]
Receivable [Domain]
Total other assets and cash collateral, gross
Other Liabilities before Effects of Master Netting Arrangements and Derivative Collateral Obligation to Return Cash Net
Represents the aggregate of the fair value of assets categorized as other which are not in and of themselves material enough to require separate disclosure, presented on a gross basis even derivatives and other financial instruments are subject to master netting arrangements and qualify for net presentation in the statement of financial position, and the amount of the obligation to return cash collateral net of the amount offset against net derivative instrument positions under master netting arrangements.
Reconciliation of the income and share data used in the basic and diluted earnings per share computations
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Derivative receivables
Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Net income from continuing operations (for EPS purposes)
Income (Loss) from Continuing Operation after Noncontrolling Interest
The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent prior to adjustment for discontinued operations.
Total tax effect
Reclassification from AOCI, Current Period, Tax
Debt Securities, Available-for-Sale, Realized Gain (Loss)
Debt Securities, Available-for-Sale, Realized Gain (Loss)
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Consolidated Entities [Axis]
Consolidated Entities [Axis]
Securities borrowed and purchased under agreements to resell
Interest Income, Federal Funds Sold and Securities Purchased under Agreements to Resell
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Securitized assets
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-Backed Financing Arrangement
Guarantor Obligations, Nature [Axis]
Guarantor Obligations, Nature [Axis]
Settlements, assets
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements
Dividends paid
Payments of Dividends
Net amounts
Security Loaned, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Measurement alternative—upward changes for observable prices
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount
Less: Netting agreements to assets
Netting agreements to assets
Netting agreements
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset
Personal, small business and other
Personal, small business and other
Personal, Small Business And Other [Member]
Represents financing receivables classified as personal, small business and other.
Insider Trading Arrangements [Line Items]
Administration and other fiduciary fees
Administration And Other Fiduciary Fees [Member]
Administration And Other Fiduciary Fees [Member]
Mortgage-backed securities
Investments Excluding Trading Securities [Member]
Assets held for their financial return, rather than for the entity's operations, excluding trading account assets.
Equity securities
Equity securities
Equity Securities [Member]
Number of loan categories
Loan Categories Number
The number of loan categories reported by the entity.
Modifications as % of loans
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Credit card arrangements with partners
Credit Card Arrangements with Partners [Member]
Credit Card Arrangements with Partners
Home equity line of credit (pre-reset)
Home Equity Line Of Credit (Pre-Reset) [Member]
Home Equity Line Of Credit (Pre-Reset) [Member]
Total
Debt-to-Value Ratio, Total Debt [Member]
Debt-to-Value Ratio, Total Debt
Gross carrying amount of Intangible assets
Intangible Assets Including Mortgage Servicing Rights Gross Carrying Amount
This element represents the gross carrying amount of intangible assets excluding goodwill but including mortgage servicing rights (MSRs), as of the balance sheet date.
Variable Rate [Axis]
Variable Rate [Axis]
Consolidation Items [Axis]
Consolidation Items [Axis]
Commissions and fees
Fees and Commissions [Line Items]
Held-to-maturity debt securities, net of allowance (fair value of which is $167,857 and $179,520 as of March 31, 2026 and December 31, 2025, respectively) (includes $98 and $70 pledged to creditors as of March 31, 2026 and December 31, 2025, respectively)
Debt securities held-to-maturity (HTM)
Amortized cost, net
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss
NCL ratio
Financing Receivable, Net Credit Loss, Percent Past Due
Financing Receivable, Net Credit Loss, Percent Past Due
Corporate bonds
Corporate
Corporate Debt Securities [Member]
Counterparty CVA
Counterparty Derivative Credit Risk Valuation Adjustment, Derivative Assets
Counterparty Derivative Credit Risk Valuation Adjustment, Derivative Assets
Fair value of collateral already posted
Collateral Already Posted, Aggregate Fair Value