Quarterly report pursuant to Section 13 or 15(d)

VIEs - Narrative (Details)

v3.4.0.3
VIEs - Narrative (Details)
$ in Billions
3 Months Ended
Sep. 30, 2015
USD ($)
Mar. 31, 2015
trust
Dec. 31, 2012
USD ($)
Mar. 31, 2012
USD ($)
Sep. 30, 2011
USD ($)
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 $ 1.0