Reconciliation of Financial Statements to Form 5500 - Reconciliation of Net Appreciation in Investments (Details) - Pfizer Savings Plan $ in Thousands	12 Months Ended
Dec. 31, 2025 USD ($)
EBP, Reconciliation of Financial Statement to Form 5500 [Line Items]
Net appreciation in investments	$ 3,274,729
Adjustment of T. Rowe Price Stable Value Fund from contract value to fair value at end of year	(42,289)
Adjustment of T. Rowe Price Stable Value Fund from contract value to fair value at beginning of year	85,505
Net appreciation in investments per Form 5500	$ 3,317,945

Amount of increase (decrease) in net asset available for benefit from realized and unrealized gain (loss) on investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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-Topic 962
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Amount of increase (decrease) in net asset available for benefit from net income (loss) as reported in Form 5500 caption for employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Form 5500 is form provided by Department of the Treasury, Internal Revenue Service (IRS); Department of Labor (DOL), Employee Benefit Security Administration (EBSA); and Pension Benefit Guaranty Corporation (PBGC).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 1
-Paragraph b
-Subparagraph (3)
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Amount of decrease in net asset available for benefit from deemed distribution in current period to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) to reconcile change in net asset available for benefit per financial statement to Form 5500 caption. Form 5500 is form provided by Department of the Treasury, Internal Revenue Service (IRS); Department of Labor (DOL), Employee Benefit Security Administration (EBSA); and Pension Benefit Guaranty Corporation (PBGC).

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Amount of increase in net asset available for benefit from deemed distribution in prior period to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) to reconcile change in net asset available for benefit per financial statement to Form 5500 caption. Form 5500 is form provided by Department of the Treasury, Internal Revenue Service (IRS); Department of Labor (DOL), Employee Benefit Security Administration (EBSA); and Pension Benefit Guaranty Corporation (PBGC).

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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.

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