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Derivatives, Gains (Losses) on Derivatives Not Designated as Hedging Instruments (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Derivatives (Textual) [Abstract]        
Net derivative gains (losses) from economic hedges related to mortgage loans held for sale and derivative loan commitments $ 568 $ 142 $ 2,600 $ 987
Not designated as hedging instrument [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 6,114 486 17,395 (752)
Derivatives (Textual) [Abstract]        
Gains (losses) on derivatives used to hedge residential mortgage servicing rights (863) (176) (3,489) (1,109)
Not designated as hedging instrument [Member] | Mortgage banking [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (570) 75 (2,020) (62)
Not designated as hedging instrument [Member] | Net gains (losses) on trading and securities [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 5,807 160 17,619 (519)
Not designated as hedging instrument [Member] | Other [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 877 251 1,796 (171)
Not designated as hedging instrument [Member] | Personnel expense [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 188 42 1,031 (357)
Economic hedges [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 617 832 1,012 378
Economic hedges [Member] | Interest contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (324) (35) (1,014) (129)
Economic hedges [Member] | Equity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 3 562 12 226
Economic hedges [Member] | Foreign exchange contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 940 310 2,009 291
Economic hedges [Member] | Credit contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (2) (5) 5 (10)
Economic hedges [Member] | Mortgage banking [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (295) (34) (933) (122)
Economic hedges [Member] | Mortgage banking [Member] | Interest contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (295) (34) (933) (122)
Economic hedges [Member] | Mortgage banking [Member] | Equity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Economic hedges [Member] | Mortgage banking [Member] | Foreign exchange contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Economic hedges [Member] | Mortgage banking [Member] | Credit contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Economic hedges [Member] | Net gains (losses) on trading and securities [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 564 0 227
Economic hedges [Member] | Net gains (losses) on trading and securities [Member] | Interest contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Economic hedges [Member] | Net gains (losses) on trading and securities [Member] | Equity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 564 0 227
Economic hedges [Member] | Net gains (losses) on trading and securities [Member] | Foreign exchange contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Economic hedges [Member] | Net gains (losses) on trading and securities [Member] | Credit contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Economic hedges [Member] | Other [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 912 302 1,945 273
Economic hedges [Member] | Other [Member] | Interest contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (29) (1) (81) (7)
Economic hedges [Member] | Other [Member] | Equity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 3 (2) 12 (1)
Economic hedges [Member] | Other [Member] | Foreign exchange contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 940 310 2,009 291
Economic hedges [Member] | Other [Member] | Credit contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (2) (5) 5 (10)
Economic hedges [Member] | Personnel expense [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 188 42 1,031 (357)
Economic hedges [Member] | Personnel expense [Member] | Interest contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Economic hedges [Member] | Personnel expense [Member] | Equity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 188 42 1,031 (357)
Economic hedges [Member] | Personnel expense [Member] | Foreign exchange contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Economic hedges [Member] | Personnel expense [Member] | Credit contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 5,497 (346) 16,383 (1,130)
Customer accommodation trading and other derivatives [Member] | Interest contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 3,586 298 8,779 1,579
Customer accommodation trading and other derivatives [Member] | Commodity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 69 31 286 75
Customer accommodation trading and other derivatives [Member] | Equity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 1,623 (773) 6,413 (3,251)
Customer accommodation trading and other derivatives [Member] | Foreign exchange contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 240 105 885 545
Customer accommodation trading and other derivatives [Member] | Credit contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (21) (7) 20 (78)
Customer accommodation trading and other derivatives [Member] | Mortgage banking [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (275) 109 (1,087) 60
Customer accommodation trading and other derivatives [Member] | Mortgage banking [Member] | Interest contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (275) 109 (1,087) 60
Customer accommodation trading and other derivatives [Member] | Mortgage banking [Member] | Commodity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Mortgage banking [Member] | Equity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Mortgage banking [Member] | Foreign exchange contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Mortgage banking [Member] | Credit contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Net gains (losses) on trading and securities [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 5,807 (404) 17,619 (746)
Customer accommodation trading and other derivatives [Member] | Net gains (losses) on trading and securities [Member] | Interest contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 3,861 189 9,866 1,519
Customer accommodation trading and other derivatives [Member] | Net gains (losses) on trading and securities [Member] | Commodity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 69 31 286 75
Customer accommodation trading and other derivatives [Member] | Net gains (losses) on trading and securities [Member] | Equity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 1,658 (722) 6,562 (2,807)
Customer accommodation trading and other derivatives [Member] | Net gains (losses) on trading and securities [Member] | Foreign exchange contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 240 105 885 545
Customer accommodation trading and other derivatives [Member] | Net gains (losses) on trading and securities [Member] | Credit contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (21) (7) 20 (78)
Customer accommodation trading and other derivatives [Member] | Other [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (35) (51) (149) (444)
Customer accommodation trading and other derivatives [Member] | Other [Member] | Interest contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Other [Member] | Commodity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Other [Member] | Equity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments (35) (51) (149) (444)
Customer accommodation trading and other derivatives [Member] | Other [Member] | Foreign exchange contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Other [Member] | Credit contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Personnel expense [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Personnel expense [Member] | Interest contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Personnel expense [Member] | Commodity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Personnel expense [Member] | Equity contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Personnel expense [Member] | Foreign exchange contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments 0 0 0 0
Customer accommodation trading and other derivatives [Member] | Personnel expense [Member] | Credit contracts [Member]        
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]        
Net gains (losses) recognized related to derivatives not designated as hedging instruments $ 0 $ 0 $ 0 $ 0