Maximum repayment period for primary residence loans for notes receivable from participants (in years) Maximum repayment period for home loans for notes receivable from participants (in years) EBP, Note Receivable From Participant, Primary Residence Loan, Maximum Borrowing Term Maximum repayment period for primary residence participant loan in employee stock purchase, saving, or similar plan Contributions, Rollover and other EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum [Member] Maximum [Member] Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Description of the Plan [Table] EBP, Description of Plan [Table] Mutual funds [Member] Mutual Fund [Member] Number of loans outstanding from participants EBP, Note Receivable From Participant, Number Of Loans Outstanding Number of participant loans outstanding in employee stock purchase, saving, or similar plan. Subsequent event [Member] Subsequent Event [Member] Total Met Tower Life, 39873 [Member] EBP, Synthetic Investment Contract, Met Tower Life, 39873 [Member] Met Tower Life synthetic investment contract Party-In-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Fully Benefit-Responsive Investment Contracts With Financial Institutions [Table] EBP, Fully Benefit-Responsive Investment Contract [Table] Quarterly loan maintenance fees per loan for notes receivable from participants EBP, Note Receivable From Participant, Quarterly Maintenance Fee Per Loan Amount of quarterly loan maintenance fee charged per participant loan in employee stock purchase, saving, or similar plan. Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Fidelity BrokerageLink investments [Member] EBP, Self-Directed Brokerage Account [Member] Maximum borrowed amount per loan for notes receivable from participants EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Maximum repayment period for non-primary residence loans for notes receivable from participants (in years) Maximum repayment period for non-home loans for notes receivable from participants (in years) EBP, Note Receivable From Participant, Non-Primary Residence Loan, Maximum Borrowing Term Maximum repayment period for non-primary residence participant loan in employee stock purchase, saving, or similar plan Minimum borrowing amount per loan for notes receivable from participants EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Accrued expenses EBP, Accrued Expense Age at which a participant will become vested in full while employed, if not already vested EBP, Employer Contribution, Maximum Vesting Age Age at which a participant will become vested in full while employed, if not already vested EBP, Fully Benefit-Responsive Investment Contract [Abstract] Investments, at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Matching contribution [Member] EBP, Employer Matching Contribution [Member] Standard employer match contribution Total Lincoln Financial Group, BVW0010G [Member] EBP, Synthetic Investment Contract, Lincoln Financial Group, BVW0010G [Member] Lincoln Financial Group synthetic investment contract Short-term investments [Member] Short-term money-market investments [Member] Money Market Funds [Member] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fully Benefit-Responsive Investment Contracts With Financial Institutions 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] Statement of Changes in Net Assets Available for Benefits [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Payment of Benefits [Policy Text Block] EBP, Payment to Participant [Policy Text Block] Transfer in from another plan EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan Total liabilities EBP, Liability EBP, Employer Contribution, Type [Domain] EBP, Employer Contribution, Type [Domain] Type of contribution to employee benefit plan. Amendment Flag Amendment Flag Basis of Presentation [Policy Text Block] EBP, Basis of Accounting [Policy Text Block] Schedule H, Line 4i [Table] EBP, Schedule of Asset Held for Investment [Table] Number of shares/units (in shares) EBP, Investment, Number of Shares Rate EBP, Investment, Interest Rate EBP, Description of Plan and Accounting Change [Abstract] EBP, Description of Plan and Accounting Change [Abstract] Receivables: EBP, Receivable [Abstract] Level within the fair value hierarchy at which the Plan's financial assets are measured on a recurring basis [Table Text Block] EBP, Investment, Fair Value and NAV [Table Text Block] Plan Termination [Line Items] EBP, Plan Termination [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Investments [Domain] Investments [Domain] Use of Estimates [Policy Text Block] EBP, Use of Estimate [Policy Text Block] Schedule H, Line 4i—Schedule of Assets (Held at End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Employer contribution and related earnings vesting service period (in years) EBP, Employer Contribution And Related Earnings, Vesting Service Period Period after which an employee becomes fully vested in their employer matching contributions and related earnings. Number of prior months used to determine highest loan outstanding balance for maximum borrowing for notes receivable from participants EBP, Note Receivable From Participant, Account Maximum Borrowing Amount, Months Prior Used To Determine Highest Loan Outstanding Balance Number of prior months used to determine highest outstanding loan balance when calculating amount of maximum account balance that participant in employee stock purchase, saving, or similar plan can borrow. Contributions, Employer Employer contributions EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Synthetic GICs [Member] EBP, Synthetic Investment Contract [Member] Minimum [Member] Minimum [Member] EBP 002 [Member] EBP 002 [Member] The Travelers 401k Savings Plan Maximum balance for automatic lump-sum distribution EBP, Automatic Lump Sum Distribution, Maximum Account Balance Maximum account balance amount to trigger automatic lump-sum payment upon participant termination of employment, retirement, or death. Interest from notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Investment Type [Axis] Investment Type [Axis] Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Contributions, Employee EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Interest rate margin percentage for notes receivable from participants EBP, Participant Loan, Basis Spread On Variable Rate Percentage added to reference rate used to compute variable rate on investment. Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Annual match EBP, Employer Contribution, Participant Compensation, Match Amount Maximum contribution amount that the employer may match per employee. Description of the Plan [Line Items] EBP, Description of Plan [Line Items] Supplemental contribution [Member] EBP, Supplemental Contribution [Member] Supplemental employer contribution for certain eligible participants Level within the fair value hierarchy at which the Company's financial assets and financial liabilities are measured [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of the Plan EBP, Description of Plan [Text Block] Statement of Changes in Net Assets Available for Benefits [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Net Assets Available for Benefits [Table] EBP, Statement of Net Asset Available for Benefit [Table] Schedule H, Line 4i [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] Interest income from investments EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Investment Contributions [Policy Text Block] EBP, Contribution [Policy Text Block] Common stock distributed at fair value EBP, Change in Net Asset Available for Benefit, Decrease from Employer Common Stock Distributed at Fair Value Value of in-kind distributions of the Company's common stock from participant accounts during the plan year. EBP, Schedule of Asset Held for Investment [Abstract] Significant Accounting Policies [Table] EBP, Accounting Policy [Table] Maximum number of loans outstanding per participant for notes receivable from participants EBP, Note Receivable From Participant, Maximum Number Of Loans Per Participant Maximum number of loans each participant can have outstanding at any one time. Investment income gain: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment, Identifier [Axis] Investment, Identifier [Axis] Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Total EBP, Asset Held for Investment Risks and Uncertainties [Policy Text Block] EBP, Risk and Uncertainty [Policy Text Block] Document Information [Line Items] Document Information [Line Items] Vesting percentage of employer contributions and related earnings EBP, Employer Contribution And Related Earnings, Vesting Percentage The percentage of employer contributions and related earnings in which the employee is vested. Matching contribution as a percent of eligible pay EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Percentage of Plan's total assets invested in common stock of TRV EBP, Investment, Employer, Common Stock, to Total Asset, Percentage Fully Benefit-Responsive Investment Contracts With Financial Institutions [Line Items] EBP, Fully Benefit-Responsive Investment Contract [Line Items] Minimum vested balance of participant rolled over to an IRA if distribution instructions have not been provided following termination of employment EBP, Participant Vested Balance Rolled Over To IRA When No Distribution Instructions Have Been Provided Following Employment Termination, Minimum Minimum account balance amount to trigger automatic rollover to IRA upon participant termination of employment when no distribution instructions were provided. Subsequent Event Type [Axis] Subsequent Event Type [Axis] Tax Status [Table] EBP, Tax Status [Table] Net increase EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Party-In-Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] 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 Pre-tax contribution rate for new hires that have not affirmatively elected to not participate, to participate at a different rate, or to contribute on an after-tax Roth 401(k) basis EBP, Participant Contribution, Automatic, Deferral Rate At fair value: EBP, Investment, Fair Value [Abstract] Paid to participants in cash 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 Current value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Level within the fair value hierarchy at which the Company's financial assets and financial liabilities are measured [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Statement of Net Asset Available for Benefit [Abstract] Significant Accounting Policies [Line Items] EBP, Accounting Policy [Line Items] At contract value: EBP, Investment, Contract Value [Abstract] EBP, Tax Status [Abstract] Common stock [Member] EBP, Employer, Common Stock Fund [Member] Other payables EBP, Other Liability Maximum percent of eligible compensation allowed to be contributed to the Plan EBP, Participant Contribution, Maximum Contribution to Eligible Compensation, Percentage Percentage of maximum pretax annual eligible compensation that participant in employee stock purchase, saving, or similar plan, is permitted to contribute to total pretax annual eligible compensation. Cash EBP, Noninterest-Bearing Cash Administrative Expenses [Policy Text Block] EBP, Expense [Policy Text Block] Notes receivable from participants EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Income Recognition [Policy Text Block] EBP, Investment [Policy Text Block] Document Type Document Type Plan Termination EBP, Plan Termination [Text Block] Entity Central Index Key Entity Central Index Key Interest rates on notes receivable from participants EBP, Asset Held for Investment, Participant Loan, Interest Rate Investments: EBP, Investment, Fair and Contract Value [Abstract] Collective/common trust funds [Member] Common Collective Trust [Member] Net assets available for benefits: EBP, Net Asset Available for Benefit [Abstract] Tax Status [Line Items] EBP, Tax Status [Line Items] Subsequent Events [Table] EBP, Subsequent Event [Table] Deductions from net assets attributed to: EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Notes receivable from participants Outstanding loans from participants EBP, Note Receivable from Participant EBP, Employer Contribution, Type [Axis] EBP, Employer Contribution, Type [Axis] Information by type of contributions to employee benefit plan. Level within the fair value hierarchy at which the Company's financial assets and financial liabilities are measured [Axis] Fair Value Hierarchy and NAV [Axis] Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name EBP, Subsequent Event [Abstract] Liabilities EBP, Liability [Abstract] Subsequent Events EBP, Subsequent Event [Text Block] Vesting percentage of participant contributions and related earnings EBP, Participant Contribution And Related Earnings, Vesting Percentage The percentage of participant contributions, supplemental contributions, and related earnings in which the employee is vested. Tax Status EBP, Tax Status [Text Block] Plan Termination [Table] EBP, Plan Termination [Table] Disclosure of information about terminating employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Maximum borrowing amount per loan, as % of vested account balance for notes receivable from participants EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Subsequent Events [Line Items] EBP, Subsequent Event [Line Items] Document Information [Table] Document Information [Table] Maximum vested balance of participant rolled over to an IRA if distribution instructions have not been provided following termination of employment EBP, Participant Vested Balance Rolled Over To IRA When No Distribution Instructions Have Been Provided Following Employment Termination, Maximum Maximum account balance amount to trigger automatic rollover to IRA upon participant termination of employment when no distribution instructions were provided. Notes Receivable from Participants [Policy Text Block] EBP, Note Receivable from Participant [Policy Text Block] Total investment income gain EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment One-time set-up fee per loan for notes receivable from participants EBP, Note Receivable From Participant, One Time Set Up Fee Per Loan Amount of one-time set-up fee charged per participant loan in employee stock purchase, saving, or similar plan. Party-In-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Other receivables EBP, Other Receivable Net assets available for benefits Beginning of year End of year 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] Fully benefit-responsive investment contracts EBP, Investment, Excluding Plan Interest in Master Trust, Contract Value Total Voya Retirement Insurance and Annuity Company, MCA-60441 [Member] EBP, Synthetic Investment Contract, Voya Retirement Insurance and Annuity Company, MCA-60441 [Member] Voya Retirement Insurance and Annuity Company synthetic investment contract Forfeiture account balance EBP, Forfeited Nonvested Account Matching contribution as a percent of employee contribution, subject to stated limit EBP, Employer Contribution, Matching Percentage Total The Prudential Insurance Company of America, GA-63058 [Member] EBP, Synthetic Investment Contract, The Prudential Insurance Company of America, GA-63058 [Member] The Prudential Insurance Company of America synthetic investment contract Forfeitures used during year EBP Forfeited Nonvested Account Decrease Total Amount of decrease in forfeited nonvested account of employee stock purchase, saving, or similar plan. Fair Value Measurements [Table] EBP, Investment, Fair Value and NAV [Table] Maximum number of days after distribution for a contribution to be considered a rollover contribution EBP, Rollover Contribution, Maximum Days After Distribution Maximum number of days after distribution for a contribution to be considered a rollover contribution EBP, Statement of Net Assets Available for Benefits [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]