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FAIR VALUE MEASUREMENTS - Summary of Assets and Liabilities Recorded at Fair Value (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Assets: |  |
Available-for-sale debt securities |  | $ 3,044
Total | $ 3,779 | 11,616
Liabilities: |  |
Total | 535 | 757
MYR GmbH |  |
Liabilities: |  |
Contingent consideration liability | 60 | 278
Level 1 |  |
Assets: |  |
Total | 3,697 | 9,741
Liabilities: |  |
Total | 458 | 406
Level 1 | MYR GmbH |  |
Liabilities: |  |
Contingent consideration liability | 0 | 0
Level 2 |  |
Assets: |  |
Total | 82 | 1,875
Liabilities: |  |
Total | 18 | 72
Level 2 | MYR GmbH |  |
Liabilities: |  |
Contingent consideration liability | 0 | 0
Level 3 |  |
Assets: |  |
Total | 0 | 0
Liabilities: |  |
Total | 60 | 278
Level 3 | MYR GmbH |  |
Liabilities: |  |
Contingent consideration liability | 60 | 278
U.S. treasury securities |  |
Assets: |  |
Available-for-sale debt securities | 0 | 1,224
U.S. treasury securities | Level 1 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 1,224
U.S. treasury securities | Level 2 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
U.S. treasury securities | Level 3 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
U.S. government agencies securities |  |
Assets: |  |
Available-for-sale debt securities | 0 | 15
U.S. government agencies securities | Level 1 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
U.S. government agencies securities | Level 2 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 15
U.S. government agencies securities | Level 3 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Corporate debt securities |  |
Assets: |  |
Available-for-sale debt securities | 0 | 1,398
Corporate debt securities | Level 1 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Corporate debt securities | Level 2 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 1,398
Corporate debt securities | Level 3 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Residential mortgage and asset-backed securities |  |
Assets: |  |
Available-for-sale debt securities | 0 | 407
Residential mortgage and asset-backed securities | Level 1 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Residential mortgage and asset-backed securities | Level 2 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 407
Residential mortgage and asset-backed securities | Level 3 |  |
Assets: |  |
Available-for-sale debt securities | 0 | 0
Money market funds |  |
Assets: |  |
Marketable equity securities | 1,563 | 6,150
Money market funds | Level 1 |  |
Assets: |  |
Marketable equity securities | 1,563 | 6,150
Money market funds | Level 2 |  |
Assets: |  |
Marketable equity securities | 0 | 0
Money market funds | Level 3 |  |
Assets: |  |
Marketable equity securities | 0 | 0
Publicly traded equity securities |  |
Assets: |  |
Marketable equity securities | 1,676 | 1,961
Publicly traded equity securities | Level 1 |  |
Assets: |  |
Marketable equity securities | 1,676 | 1,961
Publicly traded equity securities | Level 2 |  |
Assets: |  |
Marketable equity securities | 0 | 0
Publicly traded equity securities | Level 3 |  |
Assets: |  |
Marketable equity securities | 0 | 0
Deferred compensation plan |  |
Assets: |  |
Marketable equity securities | 458 | 406
Liabilities: |  |
Deferred compensation plan | 458 | 406
Deferred compensation plan | Level 1 |  |
Assets: |  |
Marketable equity securities | 458 | 406
Liabilities: |  |
Deferred compensation plan | 458 | 406
Deferred compensation plan | Level 2 |  |
Assets: |  |
Marketable equity securities | 0 | 0
Liabilities: |  |
Deferred compensation plan | 0 | 0
Deferred compensation plan | Level 3 |  |
Assets: |  |
Marketable equity securities | 0 | 0
Liabilities: |  |
Deferred compensation plan | 0 | 0
Foreign currency derivative contracts |  |
Assets: |  |
Foreign currency derivative contracts | 82 | 56
Liabilities: |  |
Foreign currency derivative contracts | 18 | 72
Foreign currency derivative contracts | Level 1 |  |
Assets: |  |
Foreign currency derivative contracts | 0 | 0
Liabilities: |  |
Foreign currency derivative contracts | 0 | 0
Foreign currency derivative contracts | Level 2 |  |
Assets: |  |
Foreign currency derivative contracts | 82 | 56
Liabilities: |  |
Foreign currency derivative contracts | 18 | 72
Foreign currency derivative contracts | Level 3 |  |
Assets: |  |
Foreign currency derivative contracts | 0 | 0
Liabilities: |  |
Foreign currency derivative contracts | $ 0 | $ 0

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