Income Taxes (Details 4) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred income tax assets:
Allowance for credit losses	$ 111	$ 96
Tax carryforwards	44	43
Deferred tax assets, gross	155	139
Deferred income tax liabilities (primarily lease basis differences)	(508)	(441)
Valuation allowance for deferred income tax assets	(2)	(11)
Deferred income tax on translation adjustment	(190)	(165)
Deferred income taxes, net	$ (545)	$ (478)