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FAIR VALUE MEASUREMENTS - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Assets: |  |
Total | $ 2,024 |
Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 10,005 | $ 10,533
Liabilities: |  |
Total | 767 | 552
Fair Value, Measurements, Recurring | MYR GmbH |  |
Liabilities: |  |
Contingent consideration liability | 274 | 206
Fair Value, Measurements, Recurring | Galapagos |  |
Liabilities: |  |
Equity securities subject to contractual sale restrictions | 570 |
Fair Value, Measurements, Recurring | Assembly Biosciences, Inc |  |
Liabilities: |  |
Equity securities subject to contractual sale restrictions | 115 |
Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 8,707 | 10,405
Liabilities: |  |
Total | 401 | 343
Level 1 | Fair Value, Measurements, Recurring | MYR GmbH |  |
Liabilities: |  |
Contingent consideration liability | 0 | 0
Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 1,298 | 128
Liabilities: |  |
Total | 92 | 3
Level 2 | Fair Value, Measurements, Recurring | MYR GmbH |  |
Liabilities: |  |
Contingent consideration liability | 0 | 0
Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
Liabilities: |  |
Total | 274 | 206
Level 3 | Fair Value, Measurements, Recurring | MYR GmbH |  |
Liabilities: |  |
Contingent consideration liability | 274 | 206
U.S. treasury securities | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 757 | 0
U.S. treasury securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 757 | 0
U.S. treasury securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
U.S. treasury securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
U.S. government agencies securities | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 5 | 0
U.S. government agencies securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
U.S. government agencies securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 5 | 0
U.S. government agencies securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
Corporate debt securities | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 963 | 0
Corporate debt securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
Corporate debt securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 963 | 0
Corporate debt securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
Residential mortgage and asset-backed securities | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 300 | 0
Residential mortgage and asset-backed securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
Residential mortgage and asset-backed securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 300 | 0
Residential mortgage and asset-backed securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
Money market funds | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 5,745 | 8,502
Money market funds | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 5,745 | 8,502
Money market funds | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 0 | 0
Money market funds | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 0 | 0
Publicly traded equity securities | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 1,804 | 1,561
Publicly traded equity securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 1,804 | 1,561
Publicly traded equity securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 0 | 0
Publicly traded equity securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 0 | 0
Deferred compensation plan | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 401 | 343
Liabilities: |  |
Deferred compensation plan | 401 | 343
Deferred compensation plan | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 401 | 343
Liabilities: |  |
Deferred compensation plan | 401 | 343
Deferred compensation plan | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 0 | 0
Liabilities: |  |
Deferred compensation plan | 0 | 0
Deferred compensation plan | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities | 0 | 0
Liabilities: |  |
Deferred compensation plan | 0 | 0
Foreign currency derivative contracts | Fair Value, Measurements, Recurring |  |
Assets: |  |
Foreign currency derivative contracts | 31 | 128
Liabilities: |  |
Foreign currency derivative contracts | 92 | 3
Foreign currency derivative contracts | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Foreign currency derivative contracts | 0 | 0
Liabilities: |  |
Foreign currency derivative contracts | 0 | 0
Foreign currency derivative contracts | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Foreign currency derivative contracts | 31 | 128
Liabilities: |  |
Foreign currency derivative contracts | 92 | 3
Foreign currency derivative contracts | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Foreign currency derivative contracts | 0 | 0
Liabilities: |  |
Foreign currency derivative contracts | $ 0 | $ 0

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