Quarterly report pursuant to Section 13 or 15(d)

VIEs - Narrative (Details)

v3.5.0.2
VIEs - Narrative (Details)
$ in Billions
3 Months Ended
Jun. 30, 2015
USD ($)
Mar. 31, 2015
trust
Dec. 31, 2012
USD ($)
Mar. 31, 2012
USD ($)
Variable Interest Entity [Line Items]        
Number of securitization trusts acquired | trust   2    
Total of automobile loans transferred in securitization transactions | $ $ 0.8   $ 1.0 $ 1.3