Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Common Stock Narrative (Details)

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Shareholders' Equity - Common Stock Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Oct. 24, 2018
Jul. 26, 2018
Apr. 25, 2018
Jan. 31, 2018
Aug. 24, 2017
Sep. 30, 2011
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jun. 28, 2018
Dec. 05, 2017
Common Stock                      
Common dividends declared (in dollars per share) $ 0.15 $ 0.15 $ 0.12 $ 0.12     $ 0.54 $ 0.39 $ 0.25    
Authorized amount                     $ 5,000,000,000.0
Common stock repurchased             $ 20,094,000,000 $ 12,814,000,000 $ 5,112,000,000    
Share-based compensation, number of shares authorized (in shares)             781,000,000        
Common Stock                      
Common Stock                      
Common stock repurchased             $ 20,094,000,000 $ 12,814,000,000 $ 5,112,000,000    
Common stock issued in connection with exercise of warrants and exchange of preferred stock (in shares)         700,000,000            
Stock issued (in shares)             75,000,000        
Shares paid for tax withholding for share based compensation (in shares)             29,000,000        
Warrants Expiring January 16, 2019                      
Common Stock                      
Warrants outstanding (in shares)             121,000,000        
2018 Comprehensive CCAR                      
Common Stock                      
Authorized amount                   $ 20,600,000,000  
2018 Comprehensive CCAR, Equity-based Compensation Plan Effect Offset                      
Common Stock                      
Authorized amount                   $ 600,000,000  
Series T Preferred Stock                      
Common Stock                      
Per annum dividend rate         6.00% 6.00% 6.00%        
Preferred stock outstanding         $ 2,900,000,000