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INVESTMENTS AND FAIR VALUE MEASUREMENT -Schedule of Amortized Cost and Fair Value of Held-to-Maturity Investments by Contractual Maturity Date (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Amortized cost    
Within 1 Year $ 53 $ 398
1 to 2 Years 0 0
Amortized Cost 53 398
Fair value    
Within 1 Year 53 399
1 to 2 Years 0 0
Total 53 399
U.S. Treasury securities    
Amortized cost    
Within 1 Year 53 337
1 to 2 Years 0 0
Amortized Cost 53 337
Fair value    
Within 1 Year 53 338
1 to 2 Years 0 0
Total $ 53 338
Corporate debt securities    
Amortized cost    
Within 1 Year   51
1 to 2 Years   0
Amortized Cost   51
Fair value    
Within 1 Year   51
1 to 2 Years   0
Total   51
U.S. government agency securities    
Amortized cost    
Within 1 Year   10
1 to 2 Years   0
Amortized Cost   10
Fair value    
Within 1 Year   10
1 to 2 Years   0
Total   $ 10