Legal Settlements and Loss Contingencies - Additional Information (Detail) € in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Nov. 30, 2020 EUR (€)
Loss Contingencies [Line Items]
Legal settlements and loss contingencies, expenses	$ 166	$ 83	$ 252	$ 188
Accrued amount for legal settlements and loss contingencies	$ 5,002		$ 5,002		$ 4,881	€ 60.5
Opioid Litigation [Member] \| United States [Member]
Loss Contingencies [Line Items]
Restructuring expense and income	Expenses in the second quarter of 2025 were mainly related to an update to the estimated provision recorded for the claims brought by attorneys general representing states and territories throughout the United States in the generic drug antitrust litigation, an update to the estimated settlement provision for the opioid cases (mainly the effect of the passage of time on the net present value of the discounted payments), and a provision recorded in connection with the antitrust litigation related to QVAR®.	Expenses in the second quarter of 2024 were mainly related to an update to the estimated settlement provision for the opioid cases (mainly the effect of the passage of time on the net present value of the discounted payments), as well as an update in the estimated provision related to the settlement of several opt-out claims in connection with the Ontario Teachers Securities litigation, partially offset by an update to the estimated provision for the U.S. DOJ patient assistance program litigation.	Expenses in the first six months of 2025 were mainly related to an update to the estimated settlement provision for the opioid cases (mainly the effect of the passage of time on the net present value of the discounted payments), an update to the estimated provision recorded for the claims brought by attorneys general representing states and territories throughout the United States in the generic drug antitrust litigation, as well a provision recorded in connection with the antitrust litigation related to QVAR.	Expenses in the first six months of 2024 were mainly related to an update to the estimated settlement provision for the opioid cases (mainly the effect of the passage of time on the net present value of the discounted payments), as well as an update in the estimated provision related to the settlement of several opt-out claims in connection with the Ontario Teachers Securities litigation.

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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