Quarterly report pursuant to Section 13 or 15(d)

Allowance for Credit Losses - Additional Information (Details)

v3.7.0.1
Allowance for Credit Losses - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]      
Provision (benefit) for loan and lease losses $ 840 $ 1,016  
Loans and leases charged off   1,496  
Allowance for credit losses 11,869 12,696  
Purchased Credit-impaired      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Provision (benefit) for loan and lease losses 68 (77)  
Loans and leases charged off 33 $ 105  
Allowance for credit losses $ 454   $ 419