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FAIR VALUE MEASUREMENTS - Additional Information (Details) € in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Dec. 31, 2025 USD ($) | Mar. 04, 2021 EUR (€)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
In-process research and development impairments | $ 1,750 | $ 190 | $ 1,750 | $ 190 |  |
Ouro Medicines LLC |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Potential future milestone payments, maximum | 500 |  | 500 |  |  |
Level 3 | Fair value |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Fair value of term loan | 1,100 |  | 1,100 |  |  |
Level 3 | Carrying value |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Carrying value of term loan | 1,100 |  | 1,100 |  |  |
Fair Value, Nonrecurring | Ouro Medicines LLC |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Contingent liability | 277 |  | 277 |  |  |
MYR GmbH |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Contingent consideration liability | 60 |  | 60 |  | $ 278 |
MYR GmbH | Level 3 |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Contingent consideration liability | 60 |  | 60 |  | 278 |
Immunomedics | Fair Value, Nonrecurring | Level 3 | Fair value |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Future royalties | 700 |  | 700 |  | 800 |
Immunomedics | Fair Value, Nonrecurring | Level 3 | Carrying value |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Future royalties | $ 1,100 |  | $ 1,100 |  | $ 1,100 |
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] |  |  |  |  |  |
Contingent consideration liability | € |  |  |  |  |  | € 300

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