Quarterly report pursuant to Section 13 or 15(d)

Allowance for Credit Losses - Additional Information (Details)

v3.4.0.3
Allowance for Credit Losses - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]      
Provision (benefit) for loan and lease losses $ 1,016 $ 756  
Loans and leases charged off 1,496 1,645  
Allowance for credit losses 12,696 14,213  
Receivables Acquired with Deteriorated Credit Quality [Member]      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Provision (benefit) for loan and lease losses (77) (50)  
Loans and leases charged off 105 288  
Financing receivable allowance sold 20 $ 110  
Allowance for credit losses $ 622   $ 804