v3.25.1
Financial Instruments Financial Instruments (Narrative) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Cash Equivalents [Member]      
Schedule of Held-to-maturity Securities [Line Items]      
Held-to-maturity securities $ 1,314 $ 2,179 $ 1,011
Marketable Securities [Member]      
Schedule of Held-to-maturity Securities [Line Items]      
Held-to-maturity securities 1 63 153
Other Assets [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available - for- sale securities $ 99 $ 97 $ 103