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FAIR VALUE MEASUREMENTS - Summary of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Assets: |  |
Available-for-sale debt securities |  | $ 2,426
Fair Value, Measurements, Recurring | Galapagos |  |
Liabilities: |  |
Equity investment, current | $ 535 | 686
Fair Value, Measurements, Recurring | Arcellx, Inc |  |
Liabilities: |  |
Equity investment, noncurrent | 467 |
Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Total | 3,715 | 8,639
Liabilities: |  |
Total | 549 | 570
Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement | MYR GmbH |  |
Liabilities: |  |
Liability for MYR GmbH (“MYR”) contingent consideration | 222 | 228
Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 3,676 | 6,633
Liabilities: |  |
Total | 318 | 283
Level 1 | Fair Value, Measurements, Recurring | MYR GmbH |  |
Liabilities: |  |
Liability for MYR GmbH (“MYR”) contingent consideration | 0 | 0
Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 39 | 2,007
Liabilities: |  |
Total | 10 | 59
Level 2 | Fair Value, Measurements, Recurring | MYR GmbH |  |
Liabilities: |  |
Liability for MYR GmbH (“MYR”) contingent consideration | 0 | 0
Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
Liabilities: |  |
Total | 222 | 228
Level 3 | Fair Value, Measurements, Recurring | MYR GmbH |  |
Liabilities: |  |
Liability for MYR GmbH (“MYR”) contingent consideration | 222 | 228
U.S. treasury securities | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Available-for-sale debt securities | 0 | 426
U.S. treasury securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 426
U.S. treasury securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
U.S. treasury securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
U.S. government agencies securities | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Available-for-sale debt securities | 0 | 127
U.S. government agencies securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
U.S. government agencies securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 127
U.S. government agencies securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Non-U.S. government securities | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Available-for-sale debt securities | 0 | 10
Non-U.S. government securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Non-U.S. government securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 10
Non-U.S. government securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Certificates of deposit | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Available-for-sale debt securities | 0 | 45
Certificates of deposit | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Certificates of deposit | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 45
Certificates of deposit | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Corporate debt securities | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Available-for-sale debt securities | 0 | 1,451
Corporate debt securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Corporate debt securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 1,451
Corporate debt securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Residential mortgage and asset-backed securities | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Available-for-sale debt securities | 0 | 367
Residential mortgage and asset-backed securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Residential mortgage and asset-backed securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 367
Residential mortgage and asset-backed securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Money market funds | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Marketable equity securities | 1,550 | 4,465
Money market funds | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 1,550 | 4,465
Money market funds | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 0 | 0
Money market funds | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 0 | 0
Publicly traded equity securities | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Marketable equity securities | 1,808 | 1,458
Publicly traded equity securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 1,808 | 1,458
Publicly traded equity securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 0 | 0
Publicly traded equity securities | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 0 | 0
Deferred compensation plan | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Marketable equity securities | 318 | 284
Liabilities: |  |
Deferred compensation plan | 318 | 283
Deferred compensation plan | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 318 | 284
Liabilities: |  |
Deferred compensation plan | 318 | 283
Deferred compensation plan | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 0 | 0
Liabilities: |  |
Deferred compensation plan | 0 | 0
Deferred compensation plan | Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 0 | 0
Liabilities: |  |
Deferred compensation plan | 0 | 0
Foreign currency derivative contracts | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Foreign currency derivative contracts | 39 | 7
Liabilities: |  |
Foreign currency derivative contracts | 10 | 59
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 | 39 | 7
Liabilities: |  |
Foreign currency derivative contracts | 10 | 59
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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