Segment Reporting - Operations Reporting by Assets (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Finance receivables, net	$ 38,658	$ 36,781
Leased vehicles, net	24,538	20,172
Total assets	72,764	65,904
Operating Segments [Member] | North America Segment [Member]
Segment Reporting Information [Line Items]
Finance receivables, net	22,535	21,558
Leased vehicles, net	24,422	20,086
Total assets	52,777	47,419
Operating Segments [Member] | International Segment [Member]
Segment Reporting Information [Line Items]
Finance receivables, net	16,123	15,223
Leased vehicles, net	116	86
Total assets	$ 19,987	$ 18,485