Equipment held for lease (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	$ 26,532	$ 25,491
Equipment held for lease, accumulated depreciation	(10,504)	(9,907)
Equipment held for lease, net	16,028	15,584
Railcars [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	9,747	9,612
Aircraft [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	11,438	10,667
Other [Member]
Property Subject to or Available for Operating Lease [Line Items]
Equipment held for lease, gross	$ 5,347	$ 5,212