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INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Income Tax Contingency [Line Items] |  |  |  |  |
Effective income tax rate reconciliation, percent | 21.40% |  | 34.60% | (5.10%) | 29.90%
Acquired in-process research and development expenses | $ 38 |  | $ 236 | $ 4,169 | $ 717
In-process research and development impairment | $ 0 |  | $ 0 | 2,430 | $ 0
In Process Research And Development NSCLC |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
In-process research and development impairment |  | $ 2,400 |  | 2,400 |
CymaBay |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Acquired in-process research and development expenses |  | $ 3,900 |  | $ 3,900 |

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