v3.25.4
Loans - Summary of Loans (Detail) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Loans Receivable [Line Items]          
Total loans, gross $ 239,882,000,000 $ 239,882,000,000 $ 239,882,000,000 $ 200,866,000,000  
Fair Value 4,905,000,000 4,905,000,000 4,905,000,000 5,460,000,000  
Held For Sale 22,066,000,000 22,066,000,000 22,066,000,000 3,525,000,000  
Allowance for loan losses (2,148,000,000) (2,148,000,000) (2,148,000,000) (4,666,000,000) $ (5,050,000,000)
Total loans 237,734,000,000 237,734,000,000 237,734,000,000 196,200,000,000  
Loans sold     425,000,000 4,440,000,000  
Reduction in loan loss reserves     2,460,000,000 330,000,000  
Seller Financing Loan Portfolio          
Loans Receivable [Line Items]          
Loans sold       0  
GreenSky          
Loans Receivable [Line Items]          
Loans sold       3,690,000,000  
GM          
Loans Receivable [Line Items]          
Loans sold     1,540,000,000    
Apple Card Loans          
Loans Receivable [Line Items]          
Total loans 19,740,000,000 19,740,000,000 19,740,000,000    
Loans transferred to held-for-sale 21,260,000,000        
Reduction in loan loss reserves   2,480,000,000 2,480,000,000    
Decrease in loan revenue   2,260,000,000 2,260,000,000    
Amortized Cost          
Loans Receivable [Line Items]          
Total loans, gross 212,911,000,000 212,911,000,000 212,911,000,000 191,881,000,000  
Allowance for loan losses (2,148,000,000) (2,148,000,000) (2,148,000,000) (4,666,000,000)  
Total loans 210,763,000,000 210,763,000,000 210,763,000,000 187,215,000,000  
Fair Value          
Loans Receivable [Line Items]          
Fair Value 4,905,000,000 4,905,000,000 4,905,000,000 5,460,000,000  
Allowance for loan losses 0 0 0 0  
Total loans 4,905,000,000 4,905,000,000 4,905,000,000 5,460,000,000  
Held For Sale          
Loans Receivable [Line Items]          
Held For Sale 22,066,000,000 22,066,000,000 22,066,000,000 3,525,000,000  
Allowance for loan losses 0 0 0 0  
Total loans 22,066,000,000 22,066,000,000 22,066,000,000 3,525,000,000  
Corporate          
Loans Receivable [Line Items]          
Total loans, gross 30,676,000,000 30,676,000,000 30,676,000,000 29,972,000,000  
Fair Value 326,000,000 326,000,000 326,000,000 467,000,000  
Corporate | Amortized Cost          
Loans Receivable [Line Items]          
Total loans, gross 29,432,000,000 29,432,000,000 29,432,000,000 28,689,000,000  
Corporate | Fair Value          
Loans Receivable [Line Items]          
Fair Value 326,000,000 326,000,000 326,000,000 467,000,000  
Corporate | Held For Sale          
Loans Receivable [Line Items]          
Held For Sale 918,000,000 918,000,000 918,000,000 816,000,000  
Commercial real estate          
Loans Receivable [Line Items]          
Total loans, gross 37,409,000,000 37,409,000,000 37,409,000,000 29,789,000,000  
Fair Value 420,000,000 420,000,000 420,000,000 424,000,000  
Commercial real estate | Amortized Cost          
Loans Receivable [Line Items]          
Total loans, gross 36,261,000,000 36,261,000,000 36,261,000,000 28,899,000,000  
Commercial real estate | Fair Value          
Loans Receivable [Line Items]          
Fair Value 420,000,000 420,000,000 420,000,000 424,000,000  
Commercial real estate | Held For Sale          
Loans Receivable [Line Items]          
Held For Sale 728,000,000 728,000,000 728,000,000 466,000,000  
Residential real estate          
Loans Receivable [Line Items]          
Total loans, gross 31,957,000,000 31,957,000,000 31,957,000,000 25,969,000,000  
Fair Value 3,257,000,000 3,257,000,000 3,257,000,000 3,726,000,000  
Residential real estate | Amortized Cost          
Loans Receivable [Line Items]          
Total loans, gross 28,700,000,000 28,700,000,000 28,700,000,000 22,243,000,000  
Residential real estate | Fair Value          
Loans Receivable [Line Items]          
Fair Value 3,257,000,000 3,257,000,000 3,257,000,000 3,726,000,000  
Residential real estate | Held For Sale          
Loans Receivable [Line Items]          
Held For Sale 0 0 0 0  
Securities-based          
Loans Receivable [Line Items]          
Total loans, gross 18,079,000,000 18,079,000,000 18,079,000,000 16,477,000,000  
Securities-based | Amortized Cost          
Loans Receivable [Line Items]          
Total loans, gross 18,079,000,000 18,079,000,000 18,079,000,000 16,477,000,000  
Securities-based | Fair Value          
Loans Receivable [Line Items]          
Fair Value 0 0 0 0  
Securities-based | Held For Sale          
Loans Receivable [Line Items]          
Held For Sale 0 0 0 0  
Other collateralized          
Loans Receivable [Line Items]          
Total loans, gross 98,999,000,000 98,999,000,000 98,999,000,000 75,107,000,000  
Fair Value 855,000,000 855,000,000 855,000,000 783,000,000  
Other collateralized | Amortized Cost          
Loans Receivable [Line Items]          
Total loans, gross 97,519,000,000 97,519,000,000 97,519,000,000 74,008,000,000  
Other collateralized | Fair Value          
Loans Receivable [Line Items]          
Fair Value 855,000,000 855,000,000 855,000,000 783,000,000  
Other collateralized | Held For Sale          
Loans Receivable [Line Items]          
Held For Sale 625,000,000 625,000,000 625,000,000 316,000,000  
Credit cards          
Loans Receivable [Line Items]          
Total loans, gross 19,742,000,000 19,742,000,000 19,742,000,000 21,403,000,000  
Credit cards | Amortized Cost          
Loans Receivable [Line Items]          
Total loans, gross 0 0 0 19,615,000,000  
Credit cards | Fair Value          
Loans Receivable [Line Items]          
Fair Value 0 0 0 0  
Credit cards | Held For Sale          
Loans Receivable [Line Items]          
Held For Sale 19,742,000,000 19,742,000,000 19,742,000,000 1,788,000,000  
Other          
Loans Receivable [Line Items]          
Total loans, gross 3,020,000,000 3,020,000,000 3,020,000,000 2,149,000,000  
Fair Value 47,000,000 47,000,000 47,000,000 60,000,000  
Other | Amortized Cost          
Loans Receivable [Line Items]          
Total loans, gross 2,920,000,000 2,920,000,000 2,920,000,000 1,950,000,000  
Other | Fair Value          
Loans Receivable [Line Items]          
Fair Value 47,000,000 47,000,000 47,000,000 60,000,000  
Other | Held For Sale          
Loans Receivable [Line Items]          
Held For Sale 53,000,000 53,000,000 53,000,000 139,000,000  
Installment          
Loans Receivable [Line Items]          
Total loans, gross $ 22,000,000 $ 22,000,000 $ 22,000,000 $ 70,000,000