Quarterly report pursuant to Section 13 or 15(d)

Securitization of Receivables - Additional Information (Detail)

v3.4.0.3
Securitization of Receivables - Additional Information (Detail) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]      
Managed receivables $ 3,200,000,000   $ 3,200,000,000
Securitization credit losses 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   $ 1,800,000,000
Minimum [Member]      
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]      
Annual servicing fees 0.05%    
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 8.00%