Annual report pursuant to Section 13 and 15(d)

VIEs - Narrative (Details)

v3.6.0.2
VIEs - Narrative (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2016
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
trust
Dec. 31, 2012
USD ($)
Mar. 31, 2012
USD ($)
Dec. 31, 2016
securitization
Variable Interest Entity [Line Items]            
Number of Securitization Trusts Acquired | trust     2      
Maximum year to defer payment of interest on Debenture           5 years
Trust 2016 Unconsolidated            
Variable Interest Entity [Line Items]            
Total of automobile loans transferred In securitization transaction $ 2          
2015-1 Automobile Trust            
Variable Interest Entity [Line Items]            
Total of automobile loans transferred In securitization transaction   $ 1        
2012-1 Automobile Trust            
Variable Interest Entity [Line Items]            
Total of automobile loans transferred In securitization transaction         $ 1  
2012-2 Automobile Trust            
Variable Interest Entity [Line Items]            
Total of automobile loans transferred In securitization transaction       $ 1    
Macquarie Equipment Finance            
Variable Interest Entity [Line Items]            
Number of securitizations | securitization           2