Annual report pursuant to Section 13 and 15(d)

Securitization of Receivables - Additional Information (Detail)

v3.3.1.900
Securitization of Receivables - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]      
Discount rates to determine fair market value of underlying assets 8.00%    
Managed receivables $ 3,200,000,000 $ 2,500,000,000  
Securitization credit losses 0 0 $ 0
Asset-backed Securities, Securitized Loans and Receivables [Member]      
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]      
Managed receivables $ 1,800,000,000 $ 1,700,000,000  
Minimum [Member]      
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]      
Annual servicing fees 0.05%    
Maximum [Member]      
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]      
Annual servicing fees 0.20%