Quarterly report pursuant to Section 13 or 15(d)

Allowance for Credit Losses - Additional Information (Details)

v3.5.0.2
Allowance for Credit Losses - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]          
Provision (benefit) for loan and lease losses $ 952 $ 729 $ 1,968 $ 1,485  
Loans and leases charged off 1,378 1,553 2,874 3,198  
Allowance for credit losses 12,587 13,656 12,587 13,656  
Receivables Acquired with Deteriorated Credit Quality [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Provision (benefit) for loan and lease losses (12) 78 (89) 28  
Loans and leases charged off 82 290 187 578  
Financing receivable allowance sold 19 $ 65 39 $ 175  
Allowance for credit losses $ 528   $ 528   $ 804