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FAIR VALUE MEASUREMENTS - Summary of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Assets: |  |
Available-for-sale debt securities | $ 2,382 | $ 2,293
Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Total | 8,042 | 7,600
Liabilities: |  |
Total | 540 | 538
Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement | MYR GmbH |  |
Liabilities: |  |
Liability for MYR GmbH (“MYR”) contingent consideration | 275 | 275
Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement | Galapagos |  |
Assets: |  |
Marketable equity securities | 571 | 736
Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement | Arcus |  |
Assets: |  |
Marketable equity securities | 266 | 286
Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 6,021 | 5,658
Liabilities: |  |
Total | 258 | 220
Level 1 | Fair Value, Measurements, Recurring | MYR GmbH |  |
Liabilities: |  |
Liability for MYR GmbH (“MYR”) contingent consideration | 0 | 0
Level 1 | Fair Value, Measurements, Recurring | Galapagos |  |
Assets: |  |
Marketable equity securities | 571 | 736
Level 1 | Fair Value, Measurements, Recurring | Arcus |  |
Assets: |  |
Marketable equity securities | 266 | 286
Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 2,021 | 1,943
Liabilities: |  |
Total | 8 | 42
Level 2 | Fair Value, Measurements, Recurring | MYR GmbH |  |
Liabilities: |  |
Liability for MYR GmbH (“MYR”) contingent consideration | 0 | 0
Level 2 | Fair Value, Measurements, Recurring | Galapagos |  |
Assets: |  |
Marketable equity securities | 0 | 0
Level 2 | Fair Value, Measurements, Recurring | Arcus |  |
Assets: |  |
Marketable equity securities | 0 | 0
Level 3 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Total | 0 | 0
Liabilities: |  |
Total | 275 | 275
Level 3 | Fair Value, Measurements, Recurring | MYR GmbH |  |
Liabilities: |  |
Liability for MYR GmbH (“MYR”) contingent consideration | 275 | 275
Level 3 | Fair Value, Measurements, Recurring | Galapagos |  |
Assets: |  |
Marketable equity securities | 0 | 0
Level 3 | Fair Value, Measurements, Recurring | Arcus |  |
Assets: |  |
Marketable equity securities | 0 | 0
U.S. treasury securities | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Available-for-sale debt securities | 428 | 410
U.S. treasury securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Available-for-sale debt securities | 428 | 410
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 | 152 | 35
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 | 152 | 35
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 | 10 | 34
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 | 10 | 34
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 | 97 | 54
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 | 97 | 54
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 | 1,334 | 1,427
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 | 1,334 | 1,427
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 | 361 | 333
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 | 361 | 333
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 | 4,240 | 3,831
Money market funds | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 4,240 | 3,831
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
Other publicly traded equity securities |  |
Assets: |  |
Total | 5,594 | 5,248
Other publicly traded equity securities | Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement |  |
Assets: |  |
Marketable equity securities | 257 | 175
Other publicly traded equity securities | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 257 | 175
Other publicly traded equity securities | Level 2 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 0 | 0
Other 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 | 259 | 220
Liabilities: |  |
Deferred compensation plan | 258 | 220
Deferred compensation plan | Level 1 | Fair Value, Measurements, Recurring |  |
Assets: |  |
Marketable equity securities | 259 | 220
Liabilities: |  |
Deferred compensation plan | 258 | 220
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 | 67 | 60
Liabilities: |  |
Foreign currency derivative contracts | 8 | 42
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 | 67 | 60
Liabilities: |  |
Foreign currency derivative contracts | 8 | 42
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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