Segment, Geographic and Other Revenue Information - Revenues by Products - Footnotes (Details) - Paxlovid [Member] treatmentCourse in Millions, $ in Millions	2 Months Ended	3 Months Ended	6 Months Ended
	Feb. 29, 2024 treatmentCourse	Mar. 31, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($) treatmentCourse
Revenue from External Customer [Line Items]
Favorable adjustment for government emergency use authorization inventory returned to the company during the period | $		$ 771	$ 771
Reversal of revenue | $				$ 3,500
Government emergency use authorization inventory returned to the company during the period, number of treatment courses | treatmentCourse	5.1
Estimated government emergency use authorization inventory to be returned to company, number of treatment courses | treatmentCourse				6.5