Financial Instruments Debt Securities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Debt Securities, AFS, Amortized Cost, Maturity after year one to five years		$ 30
One year through five years
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Gain (Loss)		0
Less than one year
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Gain (Loss)		0
Marketable Securities [Member] | Foreign Government Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	[1]	$ 0	$ 55

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