Segments Geographic Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended									12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,101		$ 867	$ 836	$ 540	$ 528	$ 515	$ 487	$ 431	$ 3,344		$ 1,960	$ 1,410
Finance receivables, net	29,282					10,998				29,282		10,998
Long-Lived Assets	3,515	[1]								3,515	[1]
Leased vehicles, net	3,383					1,703				3,383		1,703
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										2,185
Finance receivables, net	12,633									12,633
Long-Lived Assets	2,472	[1]								2,472	[1]
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										204
Finance receivables, net	247									247
Long-Lived Assets	965	[1]								965	[1]
BRAZIL
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										234
Finance receivables, net	4,355									4,355
Long-Lived Assets	4	[1]								4	[1]
MEXICO
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										158
Finance receivables, net	1,647									1,647
Long-Lived Assets	3	[1]								3	[1]
GERMANY
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										172
Finance receivables, net	3,992									3,992
Long-Lived Assets	12	[1]								12	[1]
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										150
Finance receivables, net	3,168									3,168
Long-Lived Assets	50	[1]								50	[1]
All Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										241
Finance receivables, net	3,240									3,240
Long-Lived Assets	$ 9	[1]								$ 9	[1]

[1] (a)Includes $3.4 billion of vehicles on operating leases.