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Identifiable Intangible Assets - Additional Information (Detail) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 | Sep. 30, 2023
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization of intangible assets useful life |  |  | 9 years |
Amortization of intangible assets | $ 152 | $ 165 |  |
Impairment of intangible assets excluding goodwill | $ 80 | 178 |  |
Minimum [Member] | Measurement input, discount rate [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Business combination, contingent consideration, liability, measurement input | 8.5 |  |  |
Maximum [Member] | Measurement input, discount rate [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Business combination, contingent consideration, liability, measurement input | 11 |  |  |
In process research and development [Member] | Minimum [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Business combination, contingent consideration, liability, measurement input |  |  |  | 8.5
In process research and development [Member] | Minimum [Member] | Measurement input, discount rate [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Business combination, contingent consideration, liability, measurement input |  |  |  | 20
In process research and development [Member] | Maximum [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Business combination, contingent consideration, liability, measurement input |  |  |  | 10
In process research and development [Member] | Maximum [Member] | Measurement input, discount rate [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Business combination, contingent consideration, liability, measurement input |  |  |  | 90
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 | $ 23 | 19 |  |
Identifiable product rights [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment of intangible assets excluding goodwill | $ 57 | 159 |  |
Identifiable product rights [Member] | Regulatory Price And Volume Of Products [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment of intangible assets excluding goodwill |  | 47 |  |
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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482686/350-30-45-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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