v3.26.1
Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Summary of Accounting and Financial Policies [Line Items]          
Firm's revenues from contracts with clients as a percentage of firm's total non-interest revenues 50.00% 50.00% 50.00% 50.00%  
Investment banking revenues from contracts with clients as a percentage of firms' investment banking revenue 90.00% 85.00% 90.00% 85.00%  
Investment management revenues from contracts with clients as a percentage of firm's investment management revenue 95.00% 95.00% 95.00% 95.00%  
Cash and cash equivalents due from banks $ 7,210   $ 7,210   $ 6,520
Interest-bearing deposits with banks 180,060   180,060   157,740
Cash segregated for regulatory and other purposes 18,560   18,560   14,800
Receivable from customers and counterparties 145,840   145,840   125,000
Receivables from brokers, dealers and clearing organizations 84,450   84,450   60,840
Firm's receivables from contracts with clients 4,870   4,870   4,160
Payables to customers and counterparties 272,770   272,770   224,460
Payables to brokers, dealers and clearing organizations $ 27,290   27,290   $ 7,410
Maximum          
Summary of Accounting and Financial Policies [Line Items]          
Annual average revenues associated with known remaining performance obligations     $ 450