v3.26.3
Cash, Cash Equivalents, Restricted Cash and Investments - Schedule of Available-for-Sale Debt Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Amortized cost $ 894 $ 1,237
Unrealized losses (1)  
Unrealized gains   1
Fair value 893 1,238
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 519 765
Unrealized losses (1)  
Unrealized gains   1
Fair value 518 766
Commercial paper    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 0 39
Unrealized losses 0  
Unrealized gains   0
Fair value 0 39
Corporate bonds and notes    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 375 433
Unrealized losses 0  
Unrealized gains   0
Fair value $ 375 $ 433