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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