Financial Instruments and Fair Value Measures - Derivatives not designated (Details) - Undesignated as hedging - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Interest rate swaps \| Income Statement Location [Axis]: us-gaap:InterestExpenseOperating
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain (loss) that FV changes had on earnings	$ 0	$ 0	$ 0	$ 0
Interest income				6
Marked to market remeasurement gain (loss)				6
Forward currency exchange contracts \| Income Statement Location [Axis]: us-gaap:OtherNonoperatingIncomeExpense
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain (loss) that FV changes had on earnings	$ 10	$ (1)	$ 38	$ (27)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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.

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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