Annual report pursuant to Section 13 and 15(d)

Deposits (Details)

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Deposits (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Deposits [Abstract]    
Time deposits that met or exceeded the FDIC insurance limit $ 17,000 $ 18,300
U.S.    
Time Deposits [Line Items]    
Three Months or Less 12,505  
Over Three Months to Twelve Months 10,660  
Thereafter 2,027  
Total 25,192 32,898
Non-U.S.    
Time Deposits [Line Items]    
Three Months or Less 10,561  
Over Three Months to Twelve Months 3,652  
Thereafter 1,259  
Total $ 15,472 $ 14,677