Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Details)

v3.4.0.3
Commitments and Contingencies - Additional Information (Details) - USD ($)
 3 Months Ended
Apr. 25, 2016
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Operating Leases, Future Minimum Payments Due [Abstract]        
Remainder of 2016   $ 1,800,000,000    
2017   2,200,000,000    
2018   1,800,000,000    
2019   1,600,000,000    
2020   1,300,000,000    
Thereafter   4,700,000,000    
Litigation expense   388,000,000 $ 370,000,000  
Minimum estimate range of possible loss   0    
Maximum estimated range of possible loss   2,400,000,000.0    
Commercial Banks        
Operating Leases, Future Minimum Payments Due [Abstract]        
Notional amount of derivatives   342,000,000   $ 371,000,000
Unconsolidated VIEs        
Operating Leases, Future Minimum Payments Due [Abstract]        
Notional amount of derivatives   903,000,000   922,000,000
Life Insurance Book Value Protection        
Operating Leases, Future Minimum Payments Due [Abstract]        
Notional amount of derivatives   13,800,000,000   13,800,000,000
Maximum potential exposure   3,100,000,000   3,100,000,000
Net fair value of bank-owned life insurance book value protection   10,000,000   12,000,000
Other Guarantee        
Operating Leases, Future Minimum Payments Due [Abstract]        
Maximum potential exposure   6,100,000,000   6,000,000,000
Loan Commitments        
Loss Contingencies [Line Items]        
Other commitments   1,400,000,000   729,000,000
Commodities Investment        
Loss Contingencies [Line Items]        
Other commitments   1,800,000,000   1,900,000,000
Forward-Dated Resale and Securities Borrowing Agreements        
Loss Contingencies [Line Items]        
Other commitments   86,000,000,000   88,600,000,000
Forward-Dated Repurchase and Securities Lending Agreements        
Loss Contingencies [Line Items]        
Other commitments   54,000,000,000   53,700,000,000
Payment Protection Insurance        
Operating Leases, Future Minimum Payments Due [Abstract]        
Loss contingency accrual   301,000,000   $ 360,000,000
Provision   $ 0 0  
Merchant Servicing Joint Venture        
Operating Leases, Future Minimum Payments Due [Abstract]        
Equity method investment ownership percentage   49.00%   49.00%
Merchant Processing Servicers, Sponsored Entities        
Operating Leases, Future Minimum Payments Due [Abstract]        
Transactions processed and settled by sponsored entities   $ 159,400,000,000 154,600,000,000  
Losses as result of cardholder disputed transactions   6,000,000 $ 4,000,000  
Merchant escrow deposits held as collateral   187,000,000   $ 181,000,000
Merchant Processing Servicers, Sponsored Entities | Merchant Services        
Operating Leases, Future Minimum Payments Due [Abstract]        
Maximum potential exposure   $ 268,300,000,000   $ 277,100,000,000
FHLB Seattle Litigation | Subsequent Event        
Operating Leases, Future Minimum Payments Due [Abstract]        
Litigation settlement $ 190,000,000