Debt Security - Available for sale (Details) - Foreign Government Bonds [Member] - USD ($) $ in Millions		Dec. 31, 2025	Dec. 31, 2024
Marketable Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities	[1]	$ 8	$ 0
Other Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, AFS, Fair Value, Maturity after year one to five years	[2]	$ 22	$ 97

[1] Maturity at time of purchase was more than three months to less than one year.

[2] Maturity at time of purchase was more than one year.