Equipment held for lease (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	$ 27,182	$ 25,491
Equipment held for lease, accumulated depreciation	(10,898)	(9,907)
Equipment held for lease, net	16,284	15,584
Railcars [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	9,912	9,612
Aircraft [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	11,840	10,667
Other [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	$ 5,430	$ 5,212