Goodwill and Intangible Assets - Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Finite-Lived Intangible Assets
Gross carrying amount	$ 96,096		$ 96,172
Accumulated amortization	(31,537)		(29,645)
Net carrying amount	64,559		66,527
Indefinite-lived intangible assets	289		912
Total intangible assets gross carrying amount	96,385		97,084
Intangible assets, net	64,848		67,439
Amortization expense	1,948	$ 1,855
Indefinite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	710	$ 0
AGN-151607 \| Research and development
Indefinite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	630
Developed product rights
Finite-Lived Intangible Assets
Gross carrying amount	87,622		87,698
Accumulated amortization	(26,635)		(25,003)
Net carrying amount	60,987		62,695
Developed product rights \| Imbruvica
Finite-Lived Intangible Assets
Net carrying amount	4,800
License agreements
Finite-Lived Intangible Assets
Gross carrying amount	8,474		8,474
Accumulated amortization	(4,902)		(4,642)
Net carrying amount	$ 3,572		$ 3,832

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

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

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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