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Identifiable Intangible Assets - Summary of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount net of impairment	$ 19,705	$ 19,982
Accumulated amortization	12,589	12,516
Net carrying amount	7,116	7,466
Product rights
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount net of impairment	18,544	18,815
Accumulated amortization	12,383	12,318
Net carrying amount	6,161	6,497
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount net of impairment	588	590
Accumulated amortization	206	198
Net carrying amount	382	392
In process research and development [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount net of impairment	573	577
Net carrying amount	$ 573	$ 577

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
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