v3.26.1
Loans - Summary of Concentration of Secured and Unsecured Loans (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 263,076 $ 239,882
Loans at fair value 4,640 4,905
Loans held for sale $ 24,045 $ 22,066
Loans receivable, percent to total 100.00% 100.00%
Corporate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 35,564 $ 30,676
Loans at fair value $ 615 $ 326
Loans receivable, percent to total 100.00% 100.00%
Commercial real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 40,309 $ 37,409
Loans at fair value $ 408 $ 420
Loans receivable, percent to total 100.00% 100.00%
Residential real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 35,542 $ 31,957
Loans at fair value $ 3,104 $ 3,257
Loans receivable, percent to total 100.00% 100.00%
Loan-to-value ratio 80.00% 80.00%
Residential real estate | FICO Credit Score Greater Than 740    
Financing Receivable, Recorded Investment [Line Items]    
Credit score 740 740
Securities-based    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 19,110 $ 18,079
Loans receivable, percent to total 100.00% 100.00%
Loan-to-value ratio   80.00%
Other collateralized    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 108,991 $ 98,999
Loans at fair value $ 487 $ 855
Loans receivable, percent to total 100.00% 100.00%
Credit cards    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 19,506 $ 19,742
Loans receivable, percent to total 100.00% 100.00%
Other    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 4,054 $ 3,020
Loans at fair value $ 26 $ 47
Loans receivable, percent to total 100.00% 100.00%
Secured    
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, percent to total 86.00% 86.00%
Unsecured    
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, percent to total 14.00% 14.00%
Amortized Cost    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 234,391 $ 212,911
Amortized Cost | Corporate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 33,663 29,432
Amortized Cost | Commercial real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 39,377 36,261
Amortized Cost | Residential real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 32,438 28,700
Amortized Cost | Securities-based    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 19,110 18,079
Amortized Cost | Other collateralized    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 105,809 97,519
Amortized Cost | Credit cards    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 0 0
Amortized Cost | Other    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 3,994 2,920
Investment-Grade    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 176,088 150,972
Loans at fair value 989 595
Loans held for sale $ 1,775 $ 695
Loans receivable, percent to total 100.00% 100.00%
Investment-Grade | Corporate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 12,172 $ 9,243
Investment-Grade | Commercial real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 29,852 25,529
Investment-Grade | Residential real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 18,444 16,190
Investment-Grade | Securities-based    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 18,275 13,130
Investment-Grade | Other collateralized    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 93,906 84,179
Investment-Grade | Credit cards    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 0 0
Investment-Grade | Other    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 3,439 $ 2,701
Investment-Grade | Secured    
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, percent to total 93.00% 94.00%
Investment-Grade | Unsecured    
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, percent to total 7.00% 6.00%
Investment-Grade | Amortized Cost    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 173,324 $ 149,682
Non-Investment- Grade    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 52,286 50,278
Loans at fair value 606 1,025
Loans held for sale $ 2,730 $ 1,578
Loans receivable, percent to total 100.00% 100.00%
Non-Investment- Grade | Corporate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 23,357 $ 21,432
Non-Investment- Grade | Commercial real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 10,357 11,763
Non-Investment- Grade | Residential real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 2,615 2,262
Non-Investment- Grade | Securities-based    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 809 343
Non-Investment- Grade | Other collateralized    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 14,558 14,231
Non-Investment- Grade | Credit cards    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 0 0
Non-Investment- Grade | Other    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 590 $ 247
Non-Investment- Grade | Secured    
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, percent to total 88.00% 90.00%
Non-Investment- Grade | Unsecured    
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, percent to total 12.00% 10.00%
Non-Investment- Grade | Amortized Cost    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 48,950 $ 47,675
Other Metrics/Unrated    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 34,702 38,632
Loans at fair value 3,045 3,285
Loans held for sale $ 19,540 $ 19,793
Loans receivable, percent to total 100.00% 100.00%
Other Metrics/Unrated | Corporate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 35 $ 1
Other Metrics/Unrated | Commercial real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 100 117
Other Metrics/Unrated | Residential real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 14,483 13,505
Other Metrics/Unrated | Securities-based    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 26 4,606
Other Metrics/Unrated | Other collateralized    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 527 589
Other Metrics/Unrated | Credit cards    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 19,506 19,742
Other Metrics/Unrated | Other    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 25 $ 72
Other Metrics/Unrated | Secured    
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, percent to total 43.00% 49.00%
Other Metrics/Unrated | Unsecured    
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, percent to total 57.00% 51.00%
Other Metrics/Unrated | Amortized Cost    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 12,117 $ 15,554