Rollovers into the Plan 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 Mutual Fund [Member] Other Investments EBP, Other Investment [Member] Subsequent Event Subsequent Event [Member] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Maximum loan amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Minimum loan amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Investment management fees payable EBP, Liability for Investment Management Fee Payable EBP, Liability for Investment Management Fee Payable Total investments, at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] 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] EBP, Investment, Fair Value and NAV [Abstract] Total assets EBP, Asset Assets EBP, Asset [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] Investment gain 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] Payments of Benefits EBP, Payment to Participant [Policy Text Block] Total liabilities EBP, Liability Amendment Flag Amendment Flag Deemed distributions EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Deemed Distribution Employer contribution vesting percentage EBP, Employer Contribution Vesting Percentage Company contribution and/ or investment earning percentage vesting to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions, upon completion of minimum service period or attainment of maximum vesting age 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] EBP, Description of Plan and Accounting Change [Abstract] Receivables EBP, Receivable [Abstract] Retirement Eligible Scenario [Axis] Retirement Eligible Scenario [Axis] Retirement Eligible Scenario Schedule of Plan Investments at Fair Value EBP, Investment, Fair Value and NAV [Table Text Block] Other EBP, Separate Account, Other [Member] EBP, Separate Account, Other Common Stock Common Stock [Member] Investments [Domain] Investments [Domain] Primary residence, loan term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term Use of Estimates EBP, Use of Estimate [Policy Text Block] Contributions, Tranche Two Contributions, Tranche Two [Member] Contributions, Tranche Two Schedule H, Line 4i – Schedule of Assets (Held At End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Investments at Fair Value Investments at Fair Value [Member] Investments at Fair Value Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Amounts allocated to withdrawing participants EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Allocation to Withdrawing Participant, Not yet Paid Company matching contributions EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Retirement Eligible Scenario [Domain] Retirement Eligible Scenario [Domain] Retirement Eligible Scenario [Domain] Minimum Minimum [Member] Interest and other EBP, Investment Income, Receivable Interest income 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 Participant EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Pfizer Savings Plan - Retirement Savings Contribution EBP, PFE RSC [Member] EBP, PFE RSC Net appreciation in investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) 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 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] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] Pfizer Inc. common stock EBP, Employer, Common Stock [Member] EBP, Schedule of Asset Held for Investment [Abstract] 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 Investment, Identifier [Axis] Investment, Identifier [Axis] Total EBP, Asset Held for Investment Document Information [Line Items] Document Information [Line Items] Additions/(reductions) to net assets attributed to: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) [Abstract] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] Maximum annual compensation to total compensation, percentage EBP, Participant Contribution, Maximum Annual Contribution to Eligible Compensation, Percentage EBP, Participant Contribution, Maximum Annual Contribution to Eligible Compensation, Percentage Maximum after-tax annual compensation to total compensation, percentage EBP, Participant Contribution, After Tax, Maximum Annual Contribution to Eligible Compensation, Percentage EBP, Participant Contribution, After Tax, Maximum Annual Contribution to Eligible Compensation, Percentage EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] Matching 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] Contributions [Domain] Contributions [Domain] Contributions [Domain] Company EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash Subsequent Event Type [Axis] Subsequent Event Type [Axis] EBP, Tax Status [Table] EBP, Tax Status [Table] Net increase EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Related Party Transactions and Party-In-Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] Separate account EBP, Separate Account [Member] EBP, Separate Account 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 Company contributions EBP, Employer Contribution, Receivable EBP, PR EBP PR Member [Member] EBP PR Member Investments, at fair value EBP, Investment, Fair Value [Abstract] Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Dividend income 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 Note receivable from participant, termination of employment, repayment period EBP, Note Receivable from Participant, Termination of Employment, Repayment Period EBP, Note Receivable from Participant, Termination of Employment, Repayment Period Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Contributions [Axis] Contributions [Axis] Contributions EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Tax Status [Abstract] Contributions, Tranche One Contributions, Tranche One [Member] Contributions, Tranche One EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] Retirement Eligible Scenario One Retirement Eligible Scenario One [Member] Retirement Eligible Scenario One EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] Employer contribution vesting service period EBP, Employer Contribution Vesting Service Period EBP, Employer Contribution Vesting Service Period Basis spread on variable rate EBP, Participant Loan, Basis Spread On Variable Rate EBP, Participant Loan, Basis Spread On Variable Rate Benefits paid to participants, including rollovers, per Form 5500 EBP, Form 5500 Caption, Benefit Payment and Payments to Provide Benefits Amounts allocated to withdrawing participants and deemed distributions at beginning of year EBP, Reconciliation to Form 5500, Payment to Participant, Prior Period, Decrease from Deemed Distribution Reconciliation of Financial Statements 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 Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] Document Type Document Type Plan Termination EBP, Plan Termination [Text Block] Total investment gain EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Investment Income (Loss), before Investment Expense Entity Central Index Key Entity Central Index Key Interest rates Interest Rates EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Less: Investment management, redemption and loan fees EBP, Change in Net Asset Available for Benefit, Decrease from Investment Expense Common/collective trust funds Common Collective Trust [Member] Net assets available for plan benefits EBP, Net Asset Available for Benefit [Abstract] EBP, Risk and Uncertainty [Abstract] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] Maximum pre-tax annual compensation to total compensation, percentage EBP, Participant Contribution, Pre Tax, Maximum Annual Contribution to Eligible Compensation, Percentage EBP, Participant Contribution, Pre Tax, Maximum Annual Contribution to Eligible Compensation, Percentage EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] Deductions from net assets attributed to: EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Reduction of company contributions from forfeitures EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Common/collective trust funds EBP, Separate Account, Common Collective Trust [Member] EBP, Separate Account, Common Collective Trust 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 Common stock EBP, Separate Account, Common Stock [Member] EBP, Separate Account, Common Stock EBP, Subsequent Event [Abstract] Liabilities EBP, Liability [Abstract] Subsequent Events EBP, Subsequent Event [Text Block] Tax Status EBP, Tax Status [Text Block] Retirement Eligible Scenario Two Retirement Eligible Scenario Two [Member] Retirement Eligible Scenario Two Maximum loan, to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Employer contribution, matching, retirement age EBP, Employer Contribution, Matching, Retirement Eligible, Age EBP, Employer Contribution, Matching, Retirement Eligible, Age EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] General loan, loan term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term Document Information [Table] Document Information [Table] Retirement eligible, minimum years of service EBP, Employer Contribution, Matching, Retirement Eligible, Minimum Years of Service EBP, Employer Contribution, Matching, Retirement Eligible, Minimum Years of Service Notes Receivable from Participants EBP, Note Receivable from Participant [Policy Text Block] Net investment and interest gain EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Benefits paid to participants, including rollovers, per the financial statements EBP, Reconciliation to Form 5500, Payment to Participant, Increase from Allocation to Withdrawing Participant, Not yet Paid EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Net assets available for plan benefits Beginning of year End of year Net assets available for plan benefits per the financial statements EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Forfeitures EBP, Forfeited Nonvested Account Participant compensation matched, percentage EBP, Employer Contribution, Matching Percentage Net assets available for plan benefits per Form 5500 EBP, Form 5500 Caption, Net Assets 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] Amounts allocated to withdrawing participants and deemed distributions at end of year EBP, Reconciliation to Form 5500, Payment to Participant, Current Period, Increase from Deemed Distribution