EBP 002 EBP 002 [Member] EBP 002 Related Party and Party in Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] Document Information [Line Items] Document Information [Line Items] GSK Stock Fund EBP, Employer, Common Stock Fund [Member] Counterparty Name [Domain] Counterparty Name [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Participant contributions EBP, Participant Contribution, Receivable EBP, Description of Plan and Accounting Change [Abstract] Investment Type [Axis] Investment Type [Axis] Number of hours of credited service EBP, Employer Contribution, Number Of Hours Of Credited Service EBP, Employer Contribution, Number Of Hours Of Credited Service Administrative expenses paid EBP, Administrative Expense Paid EBP, Administrative Expense Paid Tax Status EBP, Tax Status [Text Block] Employee contribution, catch-up contributions eligible age EBP, Employee Contribution, Catch-Up Contributions Eligibility, Age EBP, Employee Contribution, Catch-Up Contributions Eligibility, Age Total liabilities EBP, Liability Amounts allocated to withdrawing participants at December 31, 2025 EBP, Reconciliation to Form 5500, Payment to Participant, Increase from Allocation to Withdrawing Participant, Not yet Paid Banco Popular de Puerto Rico, the trustee Banco Popular de Puerto Rico [Member] Banco Popular de Puerto Rico EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Default investment, target retirement age EBP, Default Investment, Target Retirement Age EBP, Default Investment, Target Retirement Age GSK investment, as percent of total investments EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Net Assets, Percentage EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Net assets available for benefits per Form 5500, Schedule H EBP, Form 5500 Caption, Net Assets Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Investment acquired EBP, Investment Acquired, Excluding Plan Interest in Master Trust, Cost EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] State Street Bank and Trust Company, the custodian State Street Bank and Trust Company [Member] State Street Bank and Trust Company Total contributions Total employer and employee contribution EBP, Change in Net Asset Available for Benefit, Increase from Contribution Maximum period of annual distributions EBP, Maximum Period of Annual Distributions EBP, Maximum Period of Annual Distributions Accrued investment management fees EBP, Accrued Expense Money market fund Money Market Funds [Member] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] Benefits paid to participants Benefits paid to participants per the financial statements EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Employer contributions EBP, Employer Contribution, Receivable Fair Value of Investment EBP, Investment, Fair Value Benefits Paid to Participants EBP, Payment to Participant [Policy Text Block] Net assets available for benefits Beginning of year End of year Net assets available for benefits per the financial statements EBP, Net Asset Available for Benefit EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] Total assets EBP, Asset Interest Bearing Cash Interest-Bearing Deposits [Member] EBP, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] Amounts allocated to withdrawing participants at December 31, 2024 EBP, Reconciliation to Form 5500, Payment to Participant, Decrease from Allocation to Withdrawing Participant, Paid Threshold for receiving payments EBP, Payment of Benefits, Threshold EBP, Payment of Benefits, Threshold Employer core contribution, percentage EBP, Employer Core Contribution, Percentage EBP, Employer Core Contribution, Percentage EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] Benefits paid to participants per Form 5500, Schedule H (2e, 2g) EBP, Form 5500 Caption, Benefit Payment and Payments to Provide Benefits Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Tax Status [Abstract] Net increase in net assets EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Cover [Abstract] Employer EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] Assets EBP, Asset [Abstract] Benchmark threshold percentage EBP, Risk and Uncertainty, Concentration of Investment, Benchmark Threshold Percentage Maximum annual compensation to total compensation, percentage, pre-tax EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage EBP, Schedule of Asset Held for Investment [Abstract] Dividend income EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Cash EBP, Cash [Policy Text Block] EBP, Cash Reconciliation to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Entity [Domain] Entity [Domain] Investment, Identifier [Axis] Investment, Identifier [Axis] EBP, Risk and Uncertainty EBP, Risk and Uncertainty [Table Text Block] EBP, Investment, Fair Value and NAV [Abstract] Employer contribution, matching percentage EBP, Employer Contribution, Matching Percentage Basis of Presentation EBP, Basis of Accounting [Policy Text Block] EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Amounts allocated to withdrawing participants EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Allocation to Withdrawing Participant, Not yet Paid Mutual funds Mutual Fund [Member] EBP, Description of Plan [Table] EBP, Description of Plan [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] Dividends and interest EBP, Investment Income, Receivable Amendment Flag Amendment Flag Administrative expenses and investment management fees EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Common collective trust fund Common Collective Trust [Member] Interest income EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Investment Net asset value Fair Value Measured at Net Asset Value Per Share [Member] EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Table Text Block] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Total Investments EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Plan Termination EBP, Plan Termination [Text Block] EBP, Statement of Change in Net Asset Available for Benefit [Abstract] EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] Investment sold EBP, Investment Sold, Excluding Plan Interest in Master Trust, Selling Price EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Redemption Notice Period EBP, Fair Value, Investment, NAV, Redemption, Notice Period EBP, Statement of Net Asset Available for Benefit [Abstract] Description of the Plan EBP, Description of Plan [Text Block] Summary of Significant Accounting Policies and Recent Accounting Pronouncements EBP, Summary of Accounting Policy [Text Block] Participant EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution Total additions EBP, Change in Net Asset Available for Benefit, Increase EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items] Entity Central Index Key Entity Central Index Key Number of funds EBP, Number Of Funds EBP, Number Of Funds Investments at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Legal Entity [Axis] Legal Entity [Axis] Entity Tax Identification number Entity Tax Identification Number BlackRock Government Short Term Investment Fund BlackRock Government Short Term Investment Fund [Member] BlackRock Government Short Term Investment Fund Total investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Plan number EBP, Plan Number EBP, Schedule of Allocation, Income and Change in Plan Equity [Line Items] EBP, Schedule of Allocation, Income and Change in Plan Equity [Line Items] Contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Maximum annual compensation to total compensation, percentage, after-tax EBP, Participant Contribution, After-Tax, Maximum Annual Compensation to Total Compensation, Percentage EBP, Participant Contribution, After-Tax, Maximum Annual Compensation to Total Compensation, Percentage Vanguard Retirement Savings Trust IV Vanguard Retirement Savings Trust IV [Member] Vanguard Retirement Savings Trust IV Document Type Document Type GSK ADRs EBP, Employer, ADRs [Member] EBP, Employer, ADRs Level 3 Fair Value, Inputs, Level 3 [Member] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Use of Estimates EBP, Use of Estimate [Policy Text Block] Deductions from net assets attributed to EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] State Street Investment Management Funds State Street Investment Management Funds [Member] State Street Investment Management Funds Minimum withdrawing age for pre-tax and Roth contributions EBP, Pre-Tax And Roth Contributions, Minimum Withdrawing Age EBP, Pre-Tax And Roth Contributions, Minimum Withdrawing Age Level 2 Fair Value, Inputs, Level 2 [Member] Schedule H, Line 4i - Schedule of Assets (Held at End of Year) EBP, Schedule of Asset Held for Investment [Table Text Block] Additions to net assets attributed to EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Maximum number of annual partial distributions EBP, Maximum Number of Annual Partial Distributions EBP, Maximum Number of Annual Partial Distributions EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Investments [Domain] Investments [Domain] EBP, Subsequent Event [Abstract] EBP, Schedule of Allocation, Income and Change in Plan Equity [Table] EBP, Schedule of Allocation, Income and Change in Plan Equity [Table] Document Information [Table] Document Information [Table] 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, Risk and Uncertainty [Abstract] Level 1 Fair Value, Inputs, Level 1 [Member] Entity Registrant Name Entity Registrant Name Counterparty Name [Axis] Counterparty Name [Axis] Subsequent Events EBP, Subsequent Event [Text Block] Investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Common stock Common Stock [Member] EBP, Tax Status [Table] EBP, Tax Status [Table] Liabilities EBP, Liability [Abstract] Receivables EBP, Receivable [Abstract] Total Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Total receivables EBP, Receivable Participant compensation matched, percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Payables for securities purchased EBP, Liability for Investment Purchase