Equipment held for lease (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	$ 24,472	$ 23,735
Equipment held for lease, accumulated depreciation	(9,347)	(8,817)
Equipment held for lease, net	15,125	14,918
Railcars [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	9,558	9,448
Aircraft [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	9,798	9,234
Other [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	$ 5,116	$ 5,053