Annual report pursuant to Section 13 and 15(d)

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings (Details)

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Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Federal funds purchased and securities loaned or sold under agreements to repurchase    
Amount    
Average during year $ 199,501 $ 183,818
Maximum month-end balance during year $ 218,017 $ 196,631
Rate    
Average during year (percent) 1.30% 0.97%
Short-term borrowings    
Amount    
Average during year $ 37,337 $ 29,440
Maximum month-end balance during year $ 46,202 $ 33,051
Rate    
Average during year (percent) 2.48% 1.95%
Federal funds sold and securities borrowed or purchased under agreements to resell    
Amount    
Average during year $ 222,818 $ 216,161
Maximum month-end asset outstanding amount $ 237,064 $ 225,015
Rate    
Average asset outstanding rate (percent) 1.07% 0.52%