Goodwill and Intangible Assets - Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Finite-Lived Intangible Assets
Gross carrying amount	$ 95,799		$ 95,799		$ 97,432
Accumulated amortization	(27,744)		(27,744)		(22,151)
Net carrying amount	68,055		68,055		75,281
Indefinite-lived intangible assets	670		670		670
Total intangible assets gross carrying amount	96,469		96,469		98,102
Intangible assets, net	68,725		68,725		75,951
Impairment of intangible assets	770		770	$ 50
Amortization expense	2,000	$ 1,900	5,728	$ 5,912
Developed product rights
Finite-Lived Intangible Assets
Gross carrying amount	87,313		87,313		88,945
Accumulated amortization	(23,368)		(23,368)		(18,463)
Net carrying amount	63,945		63,945		70,482
License agreements
Finite-Lived Intangible Assets
Gross carrying amount	8,486		8,486		8,487
Accumulated amortization	(4,376)		(4,376)		(3,688)
Net carrying amount	$ 4,110		$ 4,110		$ 4,799

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 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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