Financial Instruments - Long-Term Debt, Issuance (Details) - EUR (€) € in Millions		Jun. 29, 2025	May 31, 2025
Debt Instrument [Line Items]
Effective interest rate			3.605%
Unsecured Debt [Member]
Debt Instrument [Line Items]
Face amount of debt issued	[1],[2],[3]	€ 3,300
Unsecured Debt [Member] | Senior Unsecured Notes, 2.875%, Due May 2029 [Member]
Debt Instrument [Line Items]
Stated interest rate	[1],[2]	2.875%
Face amount of debt issued	[1],[2]	€ 750
Unsecured Debt [Member] | Senior Unsecured Notes, 3.250%, Due May 2032 [Member]
Debt Instrument [Line Items]
Stated interest rate	[1],[2]	3.25%
Face amount of debt issued	[1],[2]	€ 1,000
Unsecured Debt [Member] | Senior Unsecured Notes, 3.875%, Due May 2037 [Member]
Debt Instrument [Line Items]
Stated interest rate	[1],[2]	3.875%
Face amount of debt issued	[1],[2]	€ 750
Unsecured Debt [Member] | Senior Unsecured Notes, 4.250%, Due May 2045 [Member]
Debt Instrument [Line Items]
Stated interest rate	[1],[2]	4.25%
Face amount of debt issued	[1],[2]	€ 800

[1] The notes may be redeemed by us at any time, in whole, or in part, at a make-whole redemption price plus accrued and unpaid interest.

[2] The notes are fully and unconditionally guaranteed on a senior unsecured basis by Pfizer Inc. PNIF has no assets or operations and will have no assets or operations, other than as related to the issuance, administration and repayment of the notes and any other debt securities that it may issue in the future.

[3] The weighted average effective interest rate for the notes at issuance was 3.605%