v3.26.3
Financial Instruments (Available-For-Sale Debt Securities) (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale securities $ 207 $ 204
Debt Securities, Available-for-Sale [Line Items]    
Cost 210 203
Within one year 35 63
One to five years 159 128
Six to ten years 8 2
After ten years 8 10
Available-for-sale securities 207 204
Within one year 35 63
One to five years 157 129
Six to ten years 7 2
After ten years 8 10
Corporate bonds    
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale securities 103 109
Debt Securities, Available-for-Sale [Line Items]    
Cost 104 108
Available-for-sale securities 103 109
U.S. government treasury securities    
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale securities 44 37
Debt Securities, Available-for-Sale [Line Items]    
Cost 45 37
Available-for-sale securities 44 37
U.S. federal agency securities    
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale securities 14 13
Debt Securities, Available-for-Sale [Line Items]    
Cost 15 13
Available-for-sale securities 14 13
Asset-backed securities    
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale securities 41 37
Debt Securities, Available-for-Sale [Line Items]    
Cost 41 37
Available-for-sale securities 41 37
Supranational securities    
Investments, Debt and Equity Securities [Abstract]    
Available-for-sale securities 5 8
Debt Securities, Available-for-Sale [Line Items]    
Cost 5 8
Available-for-sale securities $ 5 $ 8