Financial Instruments Cross-currency interest rate swap contracts (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Foreign exchange derivative instruments \| Derivatives Designated as Hedging Instruments: \| Income Statement Location [Axis]: us-gaap:InterestExpense
Derivative [Line Items]
Foreign exchange derivative instruments	$ 6	$ 5	$ 11	$ 10

Amount, before tax and adjustments, of gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method.