Debt Under Vehicle Programs and Borrowing Arrangements (Schedule of Contractual Maturities) (Details) - Deferred Financing Fees $ in Millions	Sep. 30, 2024 USD ($)
Debt Instrument [Line Items]
Within 1 year	$ 2,606
Between 1 and 2 years	4,546
Between 2 and 3 years	5,666
Between 3 and 4 years	2,199
Between 4 and 5 years	2,533
Thereafter	427
Total	17,977
Bank And Bank-Sponsored Facilities
Debt Instrument [Line Items]
Within 1 year	600
Between 1 and 2 years	1,600
Between 2 and 3 years	2,100
Between 3 and 4 years	$ 100