Entity tax identification number Entity Tax Identification Number Rollover EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum Maximum [Member] Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Mutual funds and other registered investment companies Mutual Fund [Member] Reinsurance Group of America Contract No. RGA00084 Reinsurance Group of America Contract No. RGA00084 [Member] Reinsurance Group of America Contract No. RGA00084 Total Synthetic guaranteed investment contracts EBP, Traditional Guaranteed Investment Contract [Member] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Payroll deduction percentage EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage EBP, Fully Benefit-Responsive Investment Contract [Table] EBP, Fully Benefit-Responsive Investment Contract [Table] Total deductions from net assets EBP, Change in Net Asset Available for Benefit, Decrease Note receivable, maximum EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Minimum borrowing amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Payable for trustee, administrative fees and other EBP, Accrued Expense EBP, Fully Benefit-Responsive Investment Contract [Abstract] Investments, at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Level 1 Fair Value, Inputs, Level 1 [Member] EBP, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] Guranteed Investment Contracts (GIC) EBP, Fully Benefit-Responsive Investment Contract [Text Block] EBP, Investment, Fair Value and NAV [Abstract] Total assets EBP, Asset Assets: EBP, Asset [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] Additions to net assets attributable to: EBP, Change in Net Asset Available for Benefit, Increase [Abstract] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Payment of Benefits EBP, Payment to Participant [Policy Text Block] Total liabilities EBP, Liability Amendment Flag Amendment Flag Basis of Accounting EBP, Basis of Accounting [Policy Text Block] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Receivable for securities sold EBP, Investment Sale, Receivable Interest rate EBP, Investment, Interest Rate EBP, Description of Plan and Accounting Change [Abstract] Receivables: EBP, Receivable [Abstract] Other investment liabilities Total Other investment liabilities EBP, Investment Liability, Fair Value EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Table Text Block] Annual increase EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate Annual increase in percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) until the contribution reaches maximum threshold. Cash-out limit EBP, Involuntary Cash-out Limit EBP, Involuntary Cash-out Limit Investments [Domain] Investments [Domain] EBP, Nonemployer, Common Stock EBP, Nonemployer, Common Stock [Member] Prudential GA 62194 Prudential GA 62194 [Member] Prudential GA 62194 Use of Estimate EBP, Use of Estimate [Policy Text Block] EBP, Related Party and Party-in-Interest [Domain] EBP, Related Party and Party-in-Interest [Domain] Schedule H, Line 4i – Schedule of Assets (Held At End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Current year adjustment from contract value to fair value for fully benefit-responsive investment contracts EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Increase (Decrease) from Contract Value to Current Value Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Employer EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Axis] Minimum Minimum [Member] American United Life Insurance Company: S00020 American United Life Insurance Company: S00020 [Member] American United Life Insurance Company: S00020 Investment Type [Axis] Investment Type [Axis] Interest income on loans receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Bank Of New York Melon Bank Of New York Melon Short Term Investment Fund [Member] Bank Of New York Melon Short Term Investment Fund Participants EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Increment percentage EBP, Investment Contribution, Minimum Increment, Percent EBP, Investment Contribution, Minimum Increment, Percent EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Plan number EBP, Plan Number Investment, Issuer Name [Axis] Investment, Issuer Name [Axis] EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of the Plan EBP, Description of Plan [Text Block] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] Adjustment from contract value to fair value for fully benefit-responsive investment contracts EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Contract Value to Current Value Adjustment EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] Interest EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Investment Citigroup common stock EBP, Employer, Common Stock [Member] Maximum catch-up contributions allowed as a percentage of eligible pay (percent) EBP, Participant Catch-Up Contribution, Maximum Annual Compensation to Total Compensation, Percentage EBP, Participant Catch-Up Contribution, Maximum Annual Compensation to Total Compensation, Percentage EBP, Schedule of Asset Held for Investment [Abstract] Participant's eligible compensation matched by the Company (up to) EBP, Employer Matching Contribution, Participant's Eligible Compensation EBP, Employer Matching Contribution, Participant's Eligible Compensation EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Total additions to net assets EBP, Change in Net Asset Available for Benefit, Increase Investment income : EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Prior year adjustment from contract value to fair value for fully benefit-responsive investment contracts EBP, Reconciliation To Form 5500, Change In Net Asset Available For Benefit, Prior Year Increase (Decrease) From Contract Value To Current Value EBP, Reconciliation To Form 5500, Change In Net Asset Available For Benefit, Prior Year Increase (Decrease) From Contract Value To Current Value Investment, Identifier [Axis] Investment, Identifier [Axis] Non-U.S. equities Non-US Equities [Member] Non-US Equities Trustee and administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Net assets available for benefits EBP, Asset Held for Investment Administrative Expenses EBP, Administrative Expenses [Text Block] EBP, Administrative Expenses Loan application fee EBP, Loan Application Fee EBP, Loan Application Fee Document Information [Line Items] Document Information [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] Percentage of eligible pay EBP, Employer Contribution, Annual Fixed Rate Contribution, Percentage Fixed rate annual contribution for eligible participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Compensation matched (percent) EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Maximum borrowing term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term Net increase in net assets per Form 5500 EBP, Form 5500 Caption, Net Income (Loss) EBP, Fully Benefit-Responsive Investment Contract [Line Items] EBP, Fully Benefit-Responsive Investment Contract [Line Items] Net increase in net assets available for benefits per the financial statements EBP, Change in Net Asset Available for Benefit, Increase (Decrease) EBP, Tax Status [Table] EBP, Tax Status [Table] American General Life Contract No. 725840 American General Life Contract No. 725840 [Member] American General Life Contract No. 725840 Related Parties and Parties-In-Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] Cash equivalents and short-term investments Cash Equivalents And Short-Term Investments [Member] Cash Equivalents And Short-Term Investments EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Total receivables EBP, Receivable Employer contributions EBP, Employer Contribution, Receivable Deferral rate EBP, Participant Contribution, Automatic, Deferral Rate Distributions to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Dividends EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Total Investments EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value U.S. equities US Equities [Member] US Equities Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] Payable for securities purchased EBP, Liability for Investment Purchase EBP, Tax Status [Abstract] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Fully Benefit-Responsive Investment Contract EBP, Fully Benefit-Responsive Investment Contract [Table Text Block] Other investment liabilities EBP, Other Liability EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP 002 EBP 002 [Member] EBP 002 Reconciliation of Financial Statements to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Participant loans EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] Participant contributions EBP, Participant Contribution, Receivable Total Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Document Type Document Type American General Life Contract No 725840, Royal Bank of Canada STANDISHCITIGROUP01 American General Life Contract No 725840, Royal Bank of Canada STANDISHCITIGROUP01 [Member] American General Life Contract No 725840, Royal Bank of Canada STANDISHCITIGROUP01 Plan Termination EBP, Plan Termination [Text Block] Entity Central Index Key Entity Central Index Key Interest rates EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Investments: EBP, Investment, Fair and Contract Value [Abstract] Collective trust funds Common Collective Trust [Member] Allocated forfeitures EBP, Forfeited Nonvested Account, Reallocated to Participant Interest and dividends EBP, Interest And Dividends, Receivable EBP, Interest And Dividends, Receivable EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Risk and Uncertainty [Abstract] EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] Deductions from net assets attributable to: EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Participant loans EBP, Note Receivable from Participant Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Summary of Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name Primary residence, maximum borrowing term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Subsequent Event [Abstract] Liabilities: EBP, Liability [Abstract] Minimum borrowing term EBP, Note Receivable From Participant, General Loan, Minimum Borrowing Term EBP, Note Receivable From Participant, General Loan, Minimum Borrowing Term Subsequent Events EBP, Subsequent Event [Text Block] Annual compensation amount, maximum EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount Tax Status EBP, Tax Status [Text Block] Maximum borrowing amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Investments in Citigroup common stock (percent) EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Total Investments, Percentage Number of shares/units EBP, Investment, Par or Maturity Value EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] Voya Retirement Ins & Annuity Co 60266 Voya Retirement Ins & Annuity Co 60266 [Member] Voya Retirement Ins & Annuity Co 60266 Document Information [Table] Document Information [Table] Net increase EBP, Change In Net Asset Available For Benefit Before Plan Transfers, Increase (Decrease) EBP, Change In Net Asset Available For Benefit Before Plan Transfers, Increase (Decrease) Investment, Issuer Name [Domain] Investment, Issuer Name [Domain] Net investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Upon termination, vesting of amounts credited to participant accounts (percent) EBP, Plan Termination, Vesting Of Amounts Credited To Participant Accounts, Percentage EBP, Plan Termination, Vesting Of Amounts Credited To Participant Accounts, Percentage EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Net assets available for benefits Beginning of year End of year Net assets available for benefits EBP, Net Asset Available for Benefit Total investments EBP, Investment, Excluding Plan Interest in Master Trust, Fair and Contract Value Entity [Domain] Entity [Domain] Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Investments in fully benefit-responsive investment contracts, at contract value Synthetic GICs EBP, Investment, Excluding Plan Interest in Master Trust, Contract Value Forfeitures EBP, Forfeited Nonvested Account Contribution EBP, Employer Contribution, Matching Percentage Basis spread EBP, Participant Loan, Basis Spread On Variable Rate EBP, Participant Loan, Basis Spread On Variable Rate Net assets available for benefits per Form 5500 EBP, Form 5500 Caption, Net Assets Fair Value of Other Assets and Liabilities EBP, Fair Value Of Other Assets And Liabilities [Policy Text Block] EBP, Fair Value Of Other Assets And Liabilities EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] Contribution receivable EBP, Employer Contribution Receivable EBP, Employer Contribution Receivable EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]