Compensation to investment alternatives, percentage EBP, Participant Contribution, Annual Compensation to Investment Alternatives, Percentage EBP, Participant Contribution, Annual Compensation to Investment Alternatives, Percentage Entity tax identification number Entity Tax Identification Number Rollovers 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] Adjustment from contract value to fair value for fully benefit-responsive investment contracts held in the Master Trust for 2024 EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Increase (Decrease) from Contract Value to Current Value, Prior Period EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Increase (Decrease) from Contract Value to Current Value, Prior Period EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Maximum annual compensation, percentage EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Self Directed Brokerage Window EBP, Self-Directed Brokerage Account [Member] EBP, Employer Contribution, Type [Domain] EBP, Employer Contribution, Type [Domain] EBP, Employer Contribution, Type [Domain] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Maximum borrowing amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Retirement age EBP, Retirement Age EBP, Retirement Age Investments, at fair value Total Investments at Fair Value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Profit-sharing contributions EBP, Profit Sharing Contribution, Receivable EBP, Profit Sharing Contribution, Receivable Plan's Interest in Master Trust EBP, Nonconsolidated, Plan Interest in Master Trust [Member] Investment, excluding plan interest in master trust, percentage EBP, Investment, Excluding Plan Interest in Master Trust, Redemption Amount, Percentage EBP, Investment, Excluding Plan Interest in Master Trust, Redemption Amount, Percentage (Level 1) Fair Value, Inputs, Level 1 [Member] Reconciliation of Financial Statements to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] EBP, Investment, Fair Value and NAV [Abstract] Total assets EBP, Asset Assets EBP, Asset [Abstract] Investments, At Fair Value Investments, At Fair Value [Member] Investments, At Fair Value Statistical Measurement [Axis] Statistical Measurement [Axis] Redemptions Less Than 20% Redemptions Less Than 20% [Member] Redemptions Less Than 20% EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Net transfers EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan EBP, Employer Contribution, Type [Axis] EBP, Employer Contribution, Type [Axis] EBP, Employer Contribution, Type EBP, Master Trust [Line Items] EBP, Master Trust [Line Items] Amendment Flag Amendment Flag Basis of Accounting EBP, Basis of Accounting [Policy Text Block] Percentage of operating profit EBP, Employer Contribution, Percentage Of Operating Profit EBP, Employer Contribution, Percentage Of Operating Profit EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Fair value to contract value adjustment EBP, Asset Held for Investment, Investment, Fair Value Adjustment to Contract Value EBP, Asset Held for Investment, Investment, Fair Value Adjustment to Contract Value Number of shares or units held EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] Receivables: EBP, Receivable [Abstract] Schedule of Fair Value EBP, Investment, Fair Value and NAV [Table Text Block] Common Stock Common Stock [Member] Investments [Domain] Investments [Domain] EBP, Master Trust [Abstract] Retirement Plans Master Trust, at contract value EBP, Investment, Plan Interest in Master Trust, Contract Value Use of Estimates EBP, Use of Estimate [Policy Text Block] Redemptions Greater Than 20% Redemptions Greater Than 20% [Member] Redemptions Greater Than 20% Pooled Separate Account, Net Asset Value EBP, Pooled Separate Account [Member] Schedule H; Line 4i - Schedule of Assets (Held at End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Hours of service required EBP, Participant Contribution, Hours Of Service Required EBP, Participant Contribution, Hours Of Service Required Adjustment from contract value to fair value for fully benefit-responsive investment contracts held in the Master Trust for 2025 EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Increase (Decrease) from Contract Value to Current Value Active participants with delinquent loans for 2024 EBP, Reconciliation to Form 5500, Change In Net Asset Available for Benefit, Increase (Decrease) From Active Participant Delinquent Loans, Prior Period EBP, Reconciliation to Form 5500, Change In Net Asset Available for Benefit, Increase (Decrease) From Active Participant Delinquent Loans, Prior Period Investments At Contract Value Investments, At Contract Value [Member] Investments, At Contract Value 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 Participant EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Investment income: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Investment Income (Loss), before Investment Expense [Abstract] Liabilities: Liabilities [Abstract] Net appreciation in fair value of investments FMV Adjustment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Interest and dividends 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] FIAM Small Cap Core Class FIAM Small Cap Core Class [Member] FIAM Small Cap Core Class Plan number EBP, Plan Number Other EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Other Investment Income (Loss) 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] Retirement Savings Plan EBP 004 [Member] EBP 004 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] Master Trust through December 31, 2025 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] Contributions EBP, Contribution [Policy Text Block] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] Investment, Fair Value, Held At Contract Value Investment, Fair Value, Held At Contract Value [Member] Investment, Fair Value, Held At Contract Value EBP, Schedule of Asset Held for Investment [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Total additions EBP, Change in Net Asset Available for Benefit, Increase Employer contribution vesting service period EBP, Employer Contribution Vesting Service Period EBP, Employer Contribution Vesting Service Period Investment, Identifier [Axis] Investment, Identifier [Axis] Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Total assets held for investment EBP, Asset Held for Investment Document Information [Line Items] Document Information [Line Items] Additions to (deductions from) net assets attributed to: Additions (deductions) to Master Trust net assets attributed to: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) [Abstract] Master Trust termination EBP, Change In Net Asset Available For Benefit, Increase (Decrease) From Master Trust Termination EBP, Change In Net Asset Available For Benefit, Increase (Decrease) From Master Trust Termination Minimum annual compensation percentage EBP, Participant Contribution, Pretax, Minimum Annual Compensation To Total Compensation, Percentage EBP, Participant Contribution, Pretax, Minimum Annual Compensation To Total Compensation, Percentage Net Assets in Master Trust EBP, Master Trust [Text Block] EBP, Contribution Vesting, Participant With 1000 Hours EBP, Contribution Vesting, Participant With 1000 Hours [Member] EBP, Contribution Vesting, Participant With 1000 Hours Participant compensation 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] EBP, Employer Matching Contribution EBP, Employer Matching Contribution [Member] EBP, Employer Matching Contribution Net income per Form 5500 EBP, Form 5500 Caption, Net Income (Loss) Active participants with delinquent loans for 2025 EBP, Reconciliation to Form 5500, Change In Net Asset Available for Benefit, Increase (Decrease) From Active Participant Delinquent Loans EBP, Reconciliation to Form 5500, Change In Net Asset Available for Benefit, Increase (Decrease) From Active Participant Delinquent Loans EBP, Tax Status [Table] EBP, Tax Status [Table] Net increase (decrease) in net assets available for benefit Net increase per the financial statements 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] 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 Tax-deferred contributions EBP, Participant Contribution, Automatic, Deferral Rate Benefit payments 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 Master Trust Income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment [Abstract] 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] Plan interest in the Southwest Airlines Co. Qualified EBP, Investment, Contract Value [Abstract] Average yield in master trust EBP, Average Yield in Master Trust, Percentage EBP, Average Yield in Master Trust, Percentage EBP, Tax Status [Abstract] Number of loans outstanding per participant EBP, Note Receivable From Participant, Account, Number Of Loans Outstanding Per Participant EBP, Note Receivable From Participant, Account, Number Of Loans Outstanding Per Participant EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] Other liabilities EBP, Other Liability Master Trust termination EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Change in Plan Interest in Master Trust EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Notes Receivable from Participants EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Valuation of Investments and Income Recognition EBP, Investment [Policy Text Block] EBP, Master Trust [Table] EBP, Master Trust [Table] Participant contributions EBP, Participant Contribution, Receivable Total Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Document Type Document Type Entity Central Index Key Entity Central Index Key Notes Receivable from Participants with interest rates ranging from 3.25% to 9.50% EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Common Collective Trusts, Net Asset Value Common Collective Trust [Member] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] Employer - Profit-sharing EBP, Change in Net Asset Available for Benefit, Increase From Employer Contribution, Cash and Noncash, Profit Sharing EBP, Change in Net Asset Available for Benefit, Increase From Employer Contribution, Cash and Noncash, Profit Sharing Notes receivable from participants EBP, Note Receivable from Participant Master Trust Assets EBP, Nonconsolidated, Master Trust [Member] 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 Employer contribution vesting percentage EBP, Employer Contribution Vesting Percentage EBP, Employer Contribution Vesting Percentage Schedule of Master Trust Net Assets EBP, Master Trust [Table Text Block] Employer - Match and Non-elective EBP, Change in Net Asset Available for Benefit, Increase From Employer Contribution, Cash and Noncash, Match and Non-Elective EBP, Change in Net Asset Available for Benefit, Increase From Employer Contribution, Cash and Noncash, Match and Non-Elective EBP, Subsequent Event [Abstract] Subsequent Events EBP, Subsequent Event [Text Block] Registered Investment Companies Other Investment Companies [Member] Income Tax Status EBP, Tax Status [Text Block] EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] Document Information [Table] Document Information [Table] EBP, Contribution Vesting Less Than Five Year EBP, Contribution Vesting Less Than Five Year [Member] EBP, Contribution Vesting Less Than Five Year Total net investment gain EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] 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] (Level 3) Fair Value, Inputs, Level 3 [Member] Other EBP, Other Receivable Contribution withdrawl period, new employee EBP, Participant Contribution, Contribution Withdrawl Period, New Employee EBP, Participant Contribution, Contribution Withdrawl Period, New Employee Net assets available for benefits Net assets available for benefits at beginning of year Net assets available for benefits at end of year Net assets available for benefits Net assets available for benefits per the financial statements EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Termination disbursement period EBP, Fair Value, Investment, NAV, Termination Disbursements, Notice Period EBP, Fair Value, Investment, NAV, Termination Disbursements, Notice Period Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Active participants with delinquent loans EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Active Participant Delinquent Loans EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Active Participant Delinquent Loans Investments, at contract value EBP, Investment, Excluding Plan Interest in Master Trust, Contract Value Assumed retirement age EBP, Employer Contribution, Retirement Age EBP, Employer Contribution, Retirement Age Forfeited nonvested account EBP, Forfeited Nonvested Account Employer contribution, matching percentage EBP, Employer Contribution, Matching Percentage EBP, Retirement Age EBP, Retirement Age [Member] EBP, Retirement Age Net assets available for benefits per Form 5500 EBP, Form 5500 Caption, Net Assets Common Collective Trusts, Net Asset Value Fair Value Measured at Net Asset Value Per Share [Member] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] Interest and dividends (as a percent) EBP, Interest in Master Trust, Percentage EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]