v3.26.1
Loans - Summary of Loans (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Loans Receivable [Line Items]            
Total loans, gross $ 263,076   $ 239,882      
Fair Value 4,640   4,905      
Held For Sale 24,045   22,066      
Allowance for loan losses (2,188) $ (2,345) (2,148) $ (4,537) $ (4,508) $ (4,666)
Total loans 260,888   237,734      
Amortized Cost            
Loans Receivable [Line Items]            
Total loans, gross 234,391   212,911      
Allowance for loan losses (2,188)   (2,148)      
Total loans 232,203   210,763      
Fair Value            
Loans Receivable [Line Items]            
Fair Value 4,640   4,905      
Allowance for loan losses 0   0      
Total loans 4,640   4,905      
Held For Sale            
Loans Receivable [Line Items]            
Held For Sale 24,045   22,066      
Allowance for loan losses 0   0      
Total loans 24,045   22,066      
Corporate            
Loans Receivable [Line Items]            
Total loans, gross 35,564   30,676      
Fair Value 615   326      
Corporate | Amortized Cost            
Loans Receivable [Line Items]            
Total loans, gross 33,663   29,432      
Corporate | Fair Value            
Loans Receivable [Line Items]            
Fair Value 615   326      
Corporate | Held For Sale            
Loans Receivable [Line Items]            
Held For Sale 1,286   918      
Commercial real estate            
Loans Receivable [Line Items]            
Total loans, gross 40,309   37,409      
Fair Value 408   420      
Commercial real estate | Amortized Cost            
Loans Receivable [Line Items]            
Total loans, gross 39,377   36,261      
Commercial real estate | Fair Value            
Loans Receivable [Line Items]            
Fair Value 408   420      
Commercial real estate | Held For Sale            
Loans Receivable [Line Items]            
Held For Sale 524   728      
Residential real estate            
Loans Receivable [Line Items]            
Total loans, gross 35,542   31,957      
Fair Value 3,104   3,257      
Residential real estate | Amortized Cost            
Loans Receivable [Line Items]            
Total loans, gross 32,438   28,700      
Residential real estate | Fair Value            
Loans Receivable [Line Items]            
Fair Value 3,104   3,257      
Residential real estate | Held For Sale            
Loans Receivable [Line Items]            
Held For Sale 0   0      
Securities-based            
Loans Receivable [Line Items]            
Total loans, gross 19,110   18,079      
Securities-based | Amortized Cost            
Loans Receivable [Line Items]            
Total loans, gross 19,110   18,079      
Securities-based | Fair Value            
Loans Receivable [Line Items]            
Fair Value 0   0      
Securities-based | Held For Sale            
Loans Receivable [Line Items]            
Held For Sale 0   0      
Other collateralized            
Loans Receivable [Line Items]            
Total loans, gross 108,991   98,999      
Fair Value 487   855      
Other collateralized | Amortized Cost            
Loans Receivable [Line Items]            
Total loans, gross 105,809   97,519      
Other collateralized | Fair Value            
Loans Receivable [Line Items]            
Fair Value 487   855      
Other collateralized | Held For Sale            
Loans Receivable [Line Items]            
Held For Sale 2,695   625      
Credit cards            
Loans Receivable [Line Items]            
Total loans, gross 19,506   19,742      
Credit cards | Amortized Cost            
Loans Receivable [Line Items]            
Total loans, gross 0   0      
Credit cards | Fair Value            
Loans Receivable [Line Items]            
Fair Value 0   0      
Credit cards | Held For Sale            
Loans Receivable [Line Items]            
Held For Sale 19,506   19,742      
Other            
Loans Receivable [Line Items]            
Total loans, gross 4,054   3,020      
Fair Value 26   47      
Other | Amortized Cost            
Loans Receivable [Line Items]            
Total loans, gross 3,994   2,920      
Other | Fair Value            
Loans Receivable [Line Items]            
Fair Value 26   47      
Other | Held For Sale            
Loans Receivable [Line Items]            
Held For Sale $ 34   $ 53