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INTANGIBLE ASSETS - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2020
Intangible Assets [Line Items] |  |  |  |  |  |
Aggregate amortization expense related to finite-lived intangible assets | $ 598 | $ 445 |  | $ 1,700 | $ 1,300 |
In-process research and development impairment | $ 0 | $ 0 |  | 0 | 2,700 |
In Process Research And Development Trodelvy For HR+/HER2- |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |
Indefinite-lived intangible assets, fair value |  |  | $ 6,100 |  |  |
In Process Research And Development Trodelvy For HR+/HER2- | Fair Value, Nonrecurring |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |
In-process research and development impairment |  |  | $ 2,700 | $ 0 | $ 2,700 |
Immunomedics | In Process Research And Development Trodelvy For HR+/HER2- |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |
Indefinite-lived intangible assets |  |  |  |  |  | $ 8,800
Immunomedics | In Process Research And Development Trodelvy For HR+/HER2- | Discount Rate |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |
Discount rate, measurement input (as percent) |  |  | 6.75% |  |  |

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- 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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