v3.22.0.1
Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Jan. 01, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Summary of Accounting and Financial Policies [Line Items]        
Firm's revenues from contracts with clients subject to ASU 2014-09 as a percentage of firm's total non-interest revenues   45.00% 45.00% 45.00%
Investment Banking revenues from contracts with clients subject to ASU 2014-09 as a percentage of firm's investment banking revenues   90.00% 90.00% 85.00%
Investment management revenues from contracts with clients subject to ASU 2014-09 as a percentage of firm's investment management revenue   95.00% 95.00% 95.00%
Cash and due from banks   $ 10,140 $ 11,950  
Interest-bearing deposits with banks   250,900 143,890  
Cash segregated for regulatory and other purposes   24,870 24,520  
Receivable from customers and counterparties   103,820 82,390  
Receivables from brokers, dealers and clearing organizations   56,850 38,940  
Firm's receivables from contracts with clients   3,010 2,600  
Payables to customers and counterparties   241,930 183,570  
Payables to brokers, dealers and clearing organizations   10,000 $ 7,090  
Maximum [Member]        
Summary of Accounting and Financial Policies [Line Items]        
Annual average revenues associated with known remaining performance obligations   $ 250    
Accounting Standards Update 2016-13 [Member]        
Summary of Accounting and Financial Policies [Line Items]        
New accounting standards impact on retained earnings $ (638)      
Accounting Standards Update 2016-13 [Member] | Maximum [Member]        
Summary of Accounting and Financial Policies [Line Items]        
Allowance for credit losses 848      
Accounting Standards Update 2016-13 [Member] | Minimum [Member]        
Summary of Accounting and Financial Policies [Line Items]        
Allowance for credit losses $ (169)