Quarterly report pursuant to Section 13 or 15(d)

Securitization of Receivables - Additional Information (Detail)

v3.5.0.2
Securitization of Receivables - Additional Information (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]          
Managed receivables $ 3,600,000,000   $ 3,600,000,000   $ 3,200,000,000
Securitization credit losses 0 $ 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 $ 2,200,000,000   $ 2,200,000,000   $ 1,800,000,000
Minimum [Member]          
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     4.00%    
Maximum [Member]          
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]          
Annual servicing fees     0.20%    
Discount rates to determine fair market value of underlying assets     7.00%