Investments in Operating Leases, Net - Investments in Operating Leases, Net (Details) - USD ($) $ in Millions		Dec. 31, 2023	Mar. 31, 2023
Property Subject To Or Available For Operating Lease [Line Items]
Investments in operating leases, net		$ 28,571	$ 29,869
Investments in operating leases [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Investments in operating leases	[1]	36,403	38,811
Investments In Operating Leases, Net [Member]
Property Subject To Or Available For Operating Lease [Line Items]
Deferred income		(551)	(694)
Accumulated depreciation		$ (7,281)	$ (8,248)

[1] Includes gross securitized investments in operating leases of $15.3 billion as of December 31, 2023 and March 31, 2023, respectively.