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INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Income Tax Contingency [Line Items] |  |  |  |  |
Effective income tax rate reconciliation (as a percent) | (31.10%) |  | 6.30% | 11.80% | 19.40%
In-process research and development impairment | $ 1,750 |  | $ 0 | $ 4,180 | $ 0
Acquired in-process research and development expenses | 505 |  | $ 91 | 4,674 | $ 808
Increase in unrecognized tax benefits |  |  |  | 200 |
Unrecognized tax benefits, increase due to current year unrecognized tax benefits |  |  |  | 700 |
Unrecognized tax benefits, reductions to prior year tax positions and settlements |  |  |  | 500 |
In Process Research And Development NSCLC |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
In-process research and development impairment | $ 1,800 | $ 2,400 |  | 4,200 |
CymaBay |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Acquired in-process research and development expenses |  | $ 3,900 |  | $ 3,900 |

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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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