Segment Reporting - Operations Reporting by Assets (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Finance receivables, net	$ 41,132	$ 36,781
Leased vehicles, net	31,775	20,172
Total assets	82,111	65,904
North America Segment [Member]
Segment Reporting Information [Line Items]
Finance receivables, net	25,366	21,558
Leased vehicles, net	31,570	20,086
Total assets	62,596	47,419
International Segment [Member]
Segment Reporting Information [Line Items]
Finance receivables, net	15,766	15,223
Leased vehicles, net	205	86
Total assets	$ 19,515	$ 18,485