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Consolidated Statement of Comprehensive Income - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Statement of Comprehensive Income [Abstract]    
Net income $ 4,010 $ 7,311
Other comprehensive income (loss), net-of-tax:    
Net change in debt securities 4,795 2,309
Net change in debit valuation adjustments 1,346 (363)
Net change in derivatives 417 229
Employee benefit plan adjustments 43 28
Net change in foreign currency translation adjustments (88) (34)
Other comprehensive income (loss) 6,513 2,169
Comprehensive income $ 10,523 $ 9,480