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FAIR VALUE MEASUREMENTS - Additional Information (Details) € in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) | Mar. 31, 2021 EUR (€)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Carrying amount related to borrowings | $ 23,349 |  | $ 23,349 |  | $ 24,987 |
In-process research and development impairment | 0 | $ 0 | 2,430 | $ 0 |  |
Liability related to assumed R&D financing arrangement | CymaBay |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Carrying amount related to borrowings | 99 |  | 99 |  | 0 |
Liability related to assumed R&D financing arrangement | Carrying value | CymaBay |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Carrying amount related to borrowings | 99 |  | 99 |  |  |
Immunomedics | Fair Value, Nonrecurring | Level 3 | Estimate of Fair Value Measurement |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Future royalties | 1,100 |  | 1,100 |  | 1,200 |
Immunomedics | Fair Value, Nonrecurring | Level 3 | Carrying value |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Future royalties | $ 1,200 |  | $ 1,200 |  | $ 1,200 |
Maximum |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Foreign currency derivative contract maturities (in months) | 18 months |  | 18 months |  |  |
Maximum | MYR GmbH |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Liability for MYR GmbH (“MYR”) contingent consideration | € |  |  |  |  |  | € 300

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