v3.25.4
Investments - Schedule of Available-For-Sale Investments (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Debt securities    
Amortized cost $ 8,525 $ 11,486
Gross unrealized gains 0 0
Gross unrealized losses 0 0
Fair values 8,525 11,486
U.S. Treasury bills    
Debt securities    
Amortized cost 998 997
Gross unrealized gains 0 0
Gross unrealized losses 0 0
Fair values 998 997
Money market mutual funds    
Debt securities    
Amortized cost 7,395 10,354
Gross unrealized gains 0 0
Gross unrealized losses 0 0
Fair values 7,395 10,354
Other short-term interest-bearing securities    
Debt securities    
Amortized cost 132 135
Gross unrealized gains 0 0
Gross unrealized losses 0 0
Fair values $ 132 $ 135