Equipment held for lease (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	$ 24,765	$ 23,735
Equipment held for lease, accumulated depreciation	(9,626)	(8,817)
Equipment held for lease, net	15,139	14,918
Railcars [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	9,556	9,448
Aircraft [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	10,089	9,234
Other [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	$ 5,120	$ 5,053