Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Definite-lived intangible assets
Gross carrying amount	$ 83,333	$ 96,172
Accumulated amortization	(28,026)	(29,645)
Net carrying amount	55,307	66,527
Indefinite-lived intangible assets	303	912
Total intangible assets gross carrying amount	83,636	97,084
Total intangible assets, net	55,610	67,439
Developed product rights
Definite-lived intangible assets
Gross carrying amount	75,142	87,698
Accumulated amortization	(22,455)	(25,003)
Net carrying amount	52,687	62,695
License agreements
Definite-lived intangible assets
Gross carrying amount	8,191	8,474
Accumulated amortization	(5,571)	(4,642)
Net carrying amount	$ 2,620	$ 3,832

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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