v3.26.1
Loans - Summary of Credit Concentration by Region (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Product Information [Line Items]    
Carrying Value $ 263,076 $ 239,882
Loans receivable, percent to total 100.00% 100.00%
Americas    
Product Information [Line Items]    
Loans receivable, percent to total 80.00% 81.00%
EMEA    
Product Information [Line Items]    
Loans receivable, percent to total 17.00% 16.00%
Asia    
Product Information [Line Items]    
Loans receivable, percent to total 3.00% 3.00%
Corporate    
Product Information [Line Items]    
Carrying Value $ 35,564 $ 30,676
Loans receivable, percent to total 100.00% 100.00%
Corporate | Americas    
Product Information [Line Items]    
Loans receivable, percent to total 62.00% 66.00%
Corporate | EMEA    
Product Information [Line Items]    
Loans receivable, percent to total 26.00% 25.00%
Corporate | Asia    
Product Information [Line Items]    
Loans receivable, percent to total 12.00% 9.00%
Commercial real estate    
Product Information [Line Items]    
Carrying Value $ 40,309 $ 37,409
Loans receivable, percent to total 100.00% 100.00%
Commercial real estate | Americas    
Product Information [Line Items]    
Loans receivable, percent to total 79.00% 76.00%
Commercial real estate | EMEA    
Product Information [Line Items]    
Loans receivable, percent to total 17.00% 20.00%
Commercial real estate | Asia    
Product Information [Line Items]    
Loans receivable, percent to total 4.00% 4.00%
Residential real estate    
Product Information [Line Items]    
Carrying Value $ 35,542 $ 31,957
Loans receivable, percent to total 100.00% 100.00%
Residential real estate | Americas    
Product Information [Line Items]    
Loans receivable, percent to total 91.00% 92.00%
Residential real estate | EMEA    
Product Information [Line Items]    
Loans receivable, percent to total 7.00% 7.00%
Residential real estate | Asia    
Product Information [Line Items]    
Loans receivable, percent to total 2.00% 1.00%
Securities-based    
Product Information [Line Items]    
Carrying Value $ 19,110 $ 18,079
Loans receivable, percent to total 100.00% 100.00%
Securities-based | Americas    
Product Information [Line Items]    
Loans receivable, percent to total 84.00% 78.00%
Securities-based | EMEA    
Product Information [Line Items]    
Loans receivable, percent to total 16.00% 22.00%
Other collateralized    
Product Information [Line Items]    
Carrying Value $ 108,991 $ 98,999
Loans receivable, percent to total 100.00% 100.00%
Other collateralized | Americas    
Product Information [Line Items]    
Loans receivable, percent to total 79.00% 80.00%
Other collateralized | EMEA    
Product Information [Line Items]    
Loans receivable, percent to total 19.00% 18.00%
Other collateralized | Asia    
Product Information [Line Items]    
Loans receivable, percent to total 2.00% 2.00%
Credit cards    
Product Information [Line Items]    
Carrying Value $ 19,506 $ 19,742
Loans receivable, percent to total 100.00% 100.00%
Credit cards | Americas    
Product Information [Line Items]    
Loans receivable, percent to total 100.00% 100.00%
Other    
Product Information [Line Items]    
Carrying Value $ 4,054 $ 3,020
Loans receivable, percent to total 100.00% 100.00%
Other | Americas    
Product Information [Line Items]    
Loans receivable, percent to total 95.00% 97.00%
Other | EMEA    
Product Information [Line Items]    
Loans receivable, percent to total 5.00% 3.00%
Technology Media Telecommunications    
Product Information [Line Items]    
Loans receivable, percent to total 24.00% 26.00%
Diversified Industrials    
Product Information [Line Items]    
Loans receivable, percent to total 21.00% 18.00%
Real estate    
Product Information [Line Items]    
Loans receivable, percent to total 15.00% 16.00%
Financial Institution    
Product Information [Line Items]    
Loans receivable, percent to total 9.00% 8.00%
Consumer and Retail    
Product Information [Line Items]    
Loans receivable, percent to total 9.00% 10.00%