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Identifiable Intangible Assets - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets useful life					9 years
Amortization of intangible assets	$ 146	$ 145	$ 444	$ 471
Impairment of intangible assets excluding goodwill	$ 28	$ 47	$ 169	$ 289
Minimum [Member] | Measurement input, discount rate [Member]
Finite-Lived Intangible Assets [Line Items]
Business combination, contingent consideration, liability, measurement input	8.5		8.5
Maximum [Member] | Measurement input, discount rate [Member]
Finite-Lived Intangible Assets [Line Items]
Business combination, contingent consideration, liability, measurement input	11		11
In process research and development [Member] | Measurement input, discount rate [Member]
Finite-Lived Intangible Assets [Line Items]
Business combination, contingent consideration, liability, measurement input		90		90
In process research and development [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Business combination, contingent consideration, liability, measurement input		8.5		8.5
In process research and development [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Business combination, contingent consideration, liability, measurement input		10		10
In process research and development [Member] | Generic Pipeline Products [Member] | Development Progress And Changes In Other Key Valuation Assumptions [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets excluding goodwill		$ 29	$ 33	$ 83
Identifiable product rights [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets excluding goodwill	$ 28	$ 18	$ 136	206
Identifiable product rights [Member] | Regulatory Price And Volume Of Products [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets excluding goodwill				94
Japan [Member] | Identifiable product rights [Member] | Updated Market Assumptions [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets excluding goodwill				$ 112

X

- Definition

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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Value of input used to measure contingent consideration liability from business combination.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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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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