Debt Under Vehicle Programs and Borrowing Arrangements (Schedule of Contractual Maturities) (Details) - Deferred Financing Fees $ in Millions	Sep. 30, 2023 USD ($)
Debt Instrument [Line Items]
Within 1 year	$ 4,343
Between 1 and 2 years	5,646
Between 2 and 3 years	2,924
Between 3 and 4 years	2,794
Between 4 and 5 years	1,939
Thereafter	1,080
Total	18,726
Bank And Bank-Sponsored Facilities
Debt Instrument [Line Items]
Within 1 year	2,700
Between 1 and 2 years	3,700
Between 2 and 3 years	$ 100