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Fair Value Measurements - Valuation Of Financial Instruments By Pricing Categories (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2025
Dec. 31, 2024
Assets [Abstract]      
Short-term investments $ 0 $ 0 $ 750
Available-for-sale securities, current 87 87 91
Total assets measured at fair value 3,688 3,688 4,977
Contingent consideration:      
Total liabilities measured at fair value 1,043 1,043 788
Fair Value, Inputs, Level 1      
Assets [Abstract]      
Cash and cash equivalents 3,256 3,256 3,652
Short-term investments 0 0 750
Trading marketable securities 301 301 259
Total assets measured at fair value 3,557 3,557 4,661
Liabilities      
Deferred compensation arrangements 301 301 259
Contingent consideration:      
Total liabilities measured at fair value 301 301 259
Fair Value, Inputs, Level 2      
Assets [Abstract]      
Available-for-sale securities, current 87 87 91
Total assets measured at fair value 131 131 316
Contingent consideration:      
Total liabilities measured at fair value 228 228 77
Fair Value, Inputs, Level 2 | Foreign currency exchange forward contracts      
Assets [Abstract]      
Derivative asset 44 44 225
Liabilities      
Foreign currency exchange forward contracts 228 228 77
Fair Value, Inputs, Level 2 | Corporate and asset-backed debt securities      
Assets [Abstract]      
Available-for-sale securities, current 50 50 53
Fair Value, Inputs, Level 2 | United States agency debt securities      
Assets [Abstract]      
Available-for-sale securities, current 0 0 1
Fair Value, Inputs, Level 2 | United States treasury debt securities      
Assets [Abstract]      
Available-for-sale securities, current 36 36 34
Fair Value, Inputs, Level 2 | Certificates of deposit      
Assets [Abstract]      
Available-for-sale securities, current 1 1 3
Fair Value, Inputs, Level 3      
Contingent consideration:      
Beginning   452 289
Additions 123   208
Change in estimate and foreign exchange   15 8
Settlements   (76) (53)
Ending 514 514 452
Total liabilities measured at fair value $ 514 $ 514 $ 452