The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Goodwill and Intangible Assets - Definite-Lived Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Aug. 29, 2023
Definite-lived intangible assets
Impairment of intangible assets					$ 4,229	$ 770	$ 50
Amortization of intangible assets					7,946	7,689	$ 7,718
Finite-Lived Intangible Assets, Net	$ 55,307				55,307	66,527
Finite-Lived Intangible Assets, Fair Value Disclosure								$ 4,000
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]		Cost of products sold
Anticipated annual amortization expense
2024	7,400				7,400
2025	7,000				7,000
2026	6,300				6,300
2027	5,600				5,600
2028	5,700				5,700
Research and development \| AGN-151607
Definite-lived intangible assets
Impairment of intangible assets			$ 630
Imbruvica
Definite-lived intangible assets
Definite-lived intangible assets impairment charges		$ 2,100
Vuity
Definite-lived intangible assets
Definite-lived intangible assets impairment charges				$ 770
Coolsculpting
Definite-lived intangible assets
Finite-Lived Intangible Assets, Fair Value Disclosure	1,300				1,300
Liletta
Definite-lived intangible assets
Finite-Lived Intangible Assets, Fair Value Disclosure	561				561
Liletta and Coolsculpting
Definite-lived intangible assets
Definite-lived intangible assets impairment charges	1,400
Developed product rights
Definite-lived intangible assets
Finite-Lived Intangible Assets, Net	52,687				52,687	62,695
Developed product rights \| Imbruvica
Definite-lived intangible assets
Finite-Lived Intangible Assets, Net								$ 1,900
Developed product rights \| Coolsculpting
Definite-lived intangible assets
Finite-Lived Intangible Assets, Net	290				290
Developed product rights \| Liletta
Definite-lived intangible assets
Finite-Lived Intangible Assets, Net	241				241
License agreements
Definite-lived intangible assets
Finite-Lived Intangible Assets, Net	$ 2,620				$ 2,620	$ 3,832
Minimum
Definite-lived intangible assets
Amortization period	1 year				1 year
Maximum
Definite-lived intangible assets
Amortization period	16 years				16 years
Weighted Average \| Developed product rights
Definite-lived intangible assets
Amortization period	12 years				12 years
Weighted Average \| License agreements
Definite-lived intangible assets
Amortization period	11 years				11 years