v3.26.1
Loans - Summary of Concentration of Secured and Unsecured Loans (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 255,194 $ 239,882
Loans at fair value 4,379 4,905
Loans held for sale $ 23,112 $ 22,066
Concentration risk percentage 100 100
Corporate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 38,156 $ 30,676
Loans at fair value $ 342 $ 326
Concentration risk percentage 100 100
Commercial real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 38,779 $ 37,409
Loans at fair value $ 417 $ 420
Concentration risk percentage 100 100
Residential real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 32,885 $ 31,957
Loans at fair value $ 3,066 $ 3,257
Concentration risk percentage 100 100
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 $ 18,592 $ 18,079
Concentration risk percentage 100 100
Loan-to-value ratio   80.00%
Other collateralized    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 104,592 $ 98,999
Loans at fair value $ 511 $ 855
Concentration risk percentage 100 100
Credit cards    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 19,055 $ 19,742
Concentration risk percentage 100 100
Other    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 3,135 $ 3,020
Loans at fair value $ 43 $ 47
Concentration risk percentage 100 100
Secured    
Financing Receivable, Recorded Investment [Line Items]    
Concentration risk percentage 85 86
Unsecured    
Financing Receivable, Recorded Investment [Line Items]    
Concentration risk percentage 15 14
Amortized Cost    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 227,703 $ 212,911
Amortized Cost | Corporate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 36,685 29,432
Amortized Cost | Commercial real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 36,904 36,261
Amortized Cost | Residential real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 29,819 28,700
Amortized Cost | Securities-based    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 18,592 18,079
Amortized Cost | Other collateralized    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 102,653 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 3,050 2,920
Investment-Grade    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 164,550 150,972
Loans at fair value 594 595
Loans held for sale $ 1,127 $ 695
Concentration risk percentage 100 100
Investment-Grade | Corporate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 11,204 $ 9,243
Investment-Grade | Commercial real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 27,424 25,529
Investment-Grade | Residential real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 16,106 16,190
Investment-Grade | Securities-based    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 17,711 13,130
Investment-Grade | Other collateralized    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 89,431 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 $ 2,674 $ 2,701
Investment-Grade | Secured    
Financing Receivable, Recorded Investment [Line Items]    
Concentration risk percentage 94 94
Investment-Grade | Unsecured    
Financing Receivable, Recorded Investment [Line Items]    
Concentration risk percentage 6 6
Investment-Grade | Amortized Cost    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 162,829 $ 149,682
Non-Investment- Grade    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 57,114 50,278
Loans at fair value 816 1,025
Loans held for sale $ 2,849 $ 1,578
Concentration risk percentage 100 100
Non-Investment- Grade | Corporate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 26,873 $ 21,432
Non-Investment- Grade | Commercial real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 11,285 11,763
Non-Investment- Grade | Residential real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 3,018 2,262
Non-Investment- Grade | Securities-based    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 846 343
Non-Investment- Grade | Other collateralized    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 14,684 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 $ 408 $ 247
Non-Investment- Grade | Secured    
Financing Receivable, Recorded Investment [Line Items]    
Concentration risk percentage 85 90
Non-Investment- Grade | Unsecured    
Financing Receivable, Recorded Investment [Line Items]    
Concentration risk percentage 15 10
Non-Investment- Grade | Amortized Cost    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 53,449 $ 47,675
Other Metrics/Unrated    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 33,530 38,632
Loans at fair value 2,969 3,285
Loans held for sale $ 19,136 $ 19,793
Concentration risk percentage 100 100
Other Metrics/Unrated | Corporate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 79 $ 1
Other Metrics/Unrated | Commercial real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 70 117
Other Metrics/Unrated | Residential real estate    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 13,761 13,505
Other Metrics/Unrated | Securities-based    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 35 4,606
Other Metrics/Unrated | Other collateralized    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 477 589
Other Metrics/Unrated | Credit cards    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross 19,055 19,742
Other Metrics/Unrated | Other    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 53 $ 72
Other Metrics/Unrated | Secured    
Financing Receivable, Recorded Investment [Line Items]    
Concentration risk percentage 43 49
Other Metrics/Unrated | Unsecured    
Financing Receivable, Recorded Investment [Line Items]    
Concentration risk percentage 57 51
Other Metrics/Unrated | Amortized Cost    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 11,425 $ 15,554