Segment Reporting and Geographic Information - Operations Reporting by Assets (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Finance receivables, net	$ 43,190	$ 36,781
Leased vehicles, net	34,526	20,172	$ 7,100
Total assets	87,765	65,904
North America [Member]
Segment Reporting Information [Line Items]
Finance receivables, net	27,617	21,558
Leased vehicles, net	34,284	20,086
Total assets	68,656	47,419
International [Member]
Segment Reporting Information [Line Items]
Finance receivables, net	15,573	15,223
Leased vehicles, net	242	86
Total assets	$ 19,109	$ 18,485