Segment Reporting - Operations Reporting by Assets (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Finance receivables, net	$ 39,430	$ 36,781
Leased vehicles assets	28,442	20,172
Total assets	77,603	65,904
Operating Segments [Member] | North America Segment [Member]
Segment Reporting Information [Line Items]
Finance receivables, net	23,546	21,558
Leased vehicles assets	28,278	20,086
Total assets	57,913	47,419
Operating Segments [Member] | International Segment [Member]
Segment Reporting Information [Line Items]
Finance receivables, net	15,884	15,223
Leased vehicles assets	164	86
Total assets	$ 19,690	$ 18,485