Investments in Operating Leases, Net - Investments in Operating Leases, Net (Details) - USD ($) $ in Millions		Mar. 31, 2025	Mar. 31, 2024
Property Subject To Or Available For Operating Lease [Line Items]
Investments in operating leases, net		$ 30,090	$ 28,013
Investments in operating leases [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Investments in operating leases	[1]	36,523	35,383
Investments In Operating Leases, Net [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Deferred income		(955)	(609)
Accumulated depreciation		$ (5,478)	$ (6,761)

[1] Includes gross securitized investments in operating leases of $13.6 billion and $13.8 billion as of March 31, 2025 and 2024, respectively.