Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum Maximum [Member] Net increase EBP, Change in Net Asset Available for Benefit, Increase (Decrease), After Transfers To (From) Other Plans EBP, Change in Net Asset Available for Benefit, Increase (Decrease), After Transfers To (From) Other Plans Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] US Treasury US Treasury Securities [Member] Mutual Fund and Common Collective Trust Mutual Fund and Common Collective Trust [Member] Mutual Fund and Common Collective Trust Mutual funds Mutual Fund [Member] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Participant contributions, maximum contribution percentage of eligible pre-tax earnings EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Brokeragelink EBP, Self-Directed Brokerage Account [Member] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Note receivable from participant, maximum borrowing amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value of Financial Instruments EBP, Investment, Fair Value and NAV [Text Block] Note receivable from participant, minimum borrowing amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Investments, at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Separately managed accounts EBP, Separately Managed Accounts [Member] EBP, Separately Managed Accounts Level 1 Fair Value, Inputs, Level 1 [Member] Corporate debt Corporate Debt Securities [Member] EBP, Investment, Fair Value and NAV [Abstract] Schedule of Related Party and Party-in-Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Table Text Block] Assets EBP, Asset [Abstract] Requisite service hours EBP, Requisite Service Hours EBP, Requisite Service Hours Statistical Measurement [Axis] Statistical Measurement [Axis] 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] Transfers to other plans Transfers to other plans EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan NAV unfunded commitment EBP, Fair Value, Investment, NAV, Unfunded Commitment Amendment Flag Amendment Flag Basis of Accounting EBP, Basis of Accounting [Policy Text Block] U.S. government securities US Government Debt Securities [Member] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Rate of interest EBP, Investment, Interest Rate Investment, number of shares EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] Schedule of Assets and Liabilities Measured at Fair Value EBP, Investment, Fair Value and NAV [Table Text Block] Participant contributions, minimum contribution percentage of eligible pre-tax earnings EBP, Participant Contribution, Pretax, Minimum Annual Compensation to Total Compensation, Percentage EBP, Participant Contribution, Pretax, Minimum Annual Compensation to Total Compensation, Percentage Investments [Domain] Investments [Domain] EBP, Plan Transfers [Table] EBP, Plan Transfers [Table] EBP, Plan Transfers Use of Estimates EBP, Use of Estimate [Policy Text Block] Age requirement (year) EBP, Requisite Age Requirement EBP, Requisite Age Requirement Schedule H, line 4(i)-Schedule of Assets (Held At End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Employer EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Minimum Minimum [Member] Investment Type [Axis] Investment Type [Axis] Interest income on notes 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 Note receivable, number of allowed loans outstanding EBP, Note Receivable from Participant, Number of Allowed Loans Outstanding EBP, Note Receivable from Participant, Number of Allowed Loans Outstanding Employee 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 Interest and dividends EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of the Truist Financial Corporation 401(k) Savings Plan EBP, Description of Plan [Text Block] Note receivable from participant, basis spread on variable rate EBP, Participant Loan, Basis Spread On Variable Rate EBP, Participant Loan, Basis Spread On Variable Rate 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] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] Money Market EBP, Separately Managed Accounts, Money Market [Member] EBP, Separately Managed Accounts, Money Market Truist common stock Common stock EBP, Employer, Common Stock [Member] Requisite service period EBP, Requisite Service Period EBP, Requisite Service Period EBP, Schedule of Asset Held for Investment [Abstract] Note receivable from participant, repayment period EBP, Note Receivable from Participant, Repayment Period EBP, Note Receivable from Participant, Repayment Period EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Total additions EBP, Change in Net Asset Available for Benefit, Increase Notes receivable from participants, allowance for credit losses EBP, Note Receivable from Participant, Allowance for Credit Loss Investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment, Identifier [Axis] Investment, Identifier [Axis] Administrative expenses Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Net assets available for benefits EBP, Asset Held for Investment Document Information [Line Items] Document Information [Line Items] Interest bearing cash Interest-Bearing Deposits [Member] Additions to (deductions from) net assets attributable to: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) [Abstract] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] Employer contribution, participant contribution matched, percentage 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] Securitized Secured Debt [Member] Stable value fund EBP, Stable Value Fund [Member] EBP, Stable Value Fund EBP, Tax Status [Table] EBP, Tax Status [Table] Net increase prior to transfer to other plans EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Related Party and Party-In-Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] Investments, at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Inclusive of Other Fund, Fair Value EBP, Investment, Excluding Plan Interest in Master Trust, Inclusive of Other Fund, Fair Value EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Employer contribution receivable EBP, Employer Contribution, Receivable Investments, dividends EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Current Value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Government-related EBP, US Government Related Securities [Member] EBP, US Government Related Securities Other liabilities EBP, Separately Managed Accounts, Other Liabilities [Member] EBP, Separately Managed Accounts, Other Liabilities EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] Plan Transfers EBP, Plan Transfers [Text Block] EBP, Plan Transfers EBP, Tax Status [Abstract] Reclassifications EBP, Reclassifications [Policy Text Block] EBP, Reclassifications Administrative Expenses and Investment-Related Fees EBP, Expense [Policy Text Block] Notes Receivable from Participants EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] Document Type Document Type Plan Termination EBP, Plan Termination [Text Block] Entity Central Index Key Entity Central Index Key Participant loan, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate Collective trusts Common Collective Trust [Member] Net assets available for benefits EBP, Net Asset Available for Benefit [Abstract] EBP, Risk and Uncertainty [Abstract] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Plan Transfers EBP, Plan Transfers [Line Items] EBP, Plan Transfers EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] Forfeited account, decrease from employer contribution EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Notes receivable from participants 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 EBP, Subsequent Event [Abstract] Subsequent Events EBP, Subsequent Event [Text Block] Tax Status EBP, Tax Status [Text Block] Note receivable from participant, maximum borrowing percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] Document Information [Table] Document Information [Table] EBP, Plan Transfers [Abstract] EBP, Plan Transfers Notes Receivable from Participants EBP, Note Receivable from Participant [Policy Text Block] Net investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment NAV redemption notice period EBP, Fair Value, Investment, NAV, Redemption, Notice Period EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP 401(k) EBP 401(k) [Member] EBP 401(k) Net assets available for benefits Beginning of year End of year EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Forfeited accounts EBP, Forfeited Nonvested Account Employer contribution, matching percentage EBP, Employer Contribution, Matching Percentage NAV Fair Value Measured at Net Asset Value Per Share [Member] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]