v3.22.0.1
Business Segments - Summary of Gross Loans by Segment and Loan and Allowance for Loan Losses (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Loans, gross $ 162,135 $ 119,989  
Allowance for loan losses (3,573) (3,874) $ (2,168)
Loans 158,562 116,115  
Investment Banking [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 30,421 27,866  
Allowance for loan losses (866) (1,322)  
Loans 29,555 26,544  
Global Markets [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 61,402 33,662  
Allowance for loan losses (486) (448)  
Loans 60,916 33,214  
Asset Management [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 14,430 17,345  
Allowance for loan losses (732) (787)  
Loans 13,698 16,558  
Consumer & Wealth Management [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 55,882 41,116  
Allowance for loan losses (1,489) (1,317)  
Loans 54,393 39,799  
Corporate [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 55,927 48,659  
Corporate [Member] | Investment Banking [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 30,421 27,866  
Corporate [Member] | Global Markets [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 18,578 13,248  
Corporate [Member] | Asset Management [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 6,928 7,545  
Real Estate [Member] | Global Markets [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 34,986 16,915  
Real Estate [Member] | Asset Management [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 6,810 9,125  
Other [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 8,530 4,174  
Other [Member] | Global Markets [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 7,838 3,499  
Other [Member] | Asset Management [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 692 675  
Wealth Management [Member] | Consumer & Wealth Management [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 43,998 33,023  
Installment [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 3,672 3,823  
Installment [Member] | Consumer & Wealth Management [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 3,672 3,823  
Credit Card Receivable [Member]      
Segment Reporting Information [Line Items]      
Loans, gross 8,212 4,270  
Credit Card Receivable [Member] | Consumer & Wealth Management [Member]      
Segment Reporting Information [Line Items]      
Loans, gross $ 8,212 $ 4,270