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Fair Value Measurements - Valuation Of Financial Instruments By Pricing Categories (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2025
Jun. 30, 2024
Dec. 31, 2024
Assets [Abstract]      
Short-term investments $ 0   $ 750
Available-for-sale securities, current 89   91
Total assets measured at fair value 2,736   4,977
Contingent consideration:      
Total liabilities measured at fair value 827   788
Fair Value, Inputs, Level 1      
Assets [Abstract]      
Cash and cash equivalents 2,320   3,652
Short-term investments 0   750
Trading marketable securities 262   259
Total assets measured at fair value 2,582   4,661
Liabilities      
Deferred compensation arrangements 262   259
Contingent consideration:      
Total liabilities measured at fair value 262   259
Fair Value, Inputs, Level 2      
Assets [Abstract]      
Available-for-sale securities, current 89   91
Total assets measured at fair value 154   316
Contingent consideration:      
Total liabilities measured at fair value 67   77
Fair Value, Inputs, Level 2 | Foreign currency exchange forward contracts      
Assets [Abstract]      
Derivative asset 65   225
Liabilities      
Foreign currency exchange forward contracts 67   77
Fair Value, Inputs, Level 2 | Corporate and asset-backed debt securities      
Assets [Abstract]      
Available-for-sale securities, current 58   53
Fair Value, Inputs, Level 2 | United States agency debt securities      
Assets [Abstract]      
Available-for-sale securities, current 1   1
Fair Value, Inputs, Level 2 | United States treasury debt securities      
Assets [Abstract]      
Available-for-sale securities, current 27   34
Fair Value, Inputs, Level 2 | Certificates of deposit      
Assets [Abstract]      
Available-for-sale securities, current 3   3
Fair Value, Inputs, Level 3      
Contingent consideration:      
Beginning 452 $ 289  
Additions 90 208  
Change in estimate and foreign exchange 0 8  
Settlements (44) $ (53)  
Ending 498    
Total liabilities measured at fair value $ 498   $ 452