Variable Interest Entities (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Schedule Of Transfer And Financial Assets [Line Items]
Non-securitized contract receivables	$ 3,434	$ 3,301
Non Securitized Receivable [Member]
Schedule Of Transfer And Financial Assets [Line Items]
Non-securitized contract receivables	1,263	1,020
Non Securitized Receivable [Member] \| Variable Interest Entity, Primary Beneficiary [Member]
Schedule Of Transfer And Financial Assets [Line Items]
Non-securitized contract receivables	$ 1,263	$ 1,020

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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+ Details