v3.26.1
Loans, Lending Commitments and Related Allowance for Credit Losses - Modified Loans Held for Investment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 407 $ 242 $ 1,302 $ 401
Term Extension        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 50 $ 443 $ 59 $ 489
Interest Rate Reduction (%) 0.60% 2.80% 0.00% 0.40%
Other-than-insignificant Payment Delay        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 5 $ 0 $ 5 $ 29
Interest Rate Reduction (%) 0.00% 0.00% 0.00% 0.00%
Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 27 $ 77 $ 27 $ 77
Interest Rate Reduction (%) 0.30% 0.10% 0.30% 0.10%
Corporate        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 82 $ 520 $ 91 $ 595
Interest Rate Reduction (%) 0.10% 0.60% 0.10% 0.30%
Corporate | Term Extension        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 0 $ 113 $ 5 $ 126
Interest Rate Reduction (%) 0.00% 1.50% 0.10% 1.60%
Corporate | Term Extension | Single Modifications        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification   26 months 20 months 27 months
Corporate | Term Extension | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification 28 months   28 months  
Corporate | Other-than-insignificant Payment Delay | Single Modifications        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification   0 months 0 months 0 months
Corporate | Other-than-insignificant Payment Delay | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification 0 months   0 months  
Corporate | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 27 $ 0 $ 27 $ 0
Interest Rate Reduction (%) 0.30% 0.00% 0.30% 0.00%
Corporate | Principal Forgiveness | Single Modifications        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount   $ 0 $ 0 $ 0
Corporate | Principal Forgiveness | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 0   $ 0  
Corporate | Interest Rate Reduction | Single Modifications        
Financing Receivable, Modified [Line Items]        
Interest Rate Reduction (%)   0.00% 0.00% 0.00%
Corporate | Interest Rate Reduction | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Interest Rate Reduction (%) 0.10%   0.10%  
Commercial real estate | Term Extension        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 50 $ 330 $ 50 $ 330
Interest Rate Reduction (%) 0.60% 4.00% 0.60% 4.00%
Commercial real estate | Term Extension | Single Modifications        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification 48 months 33 months 48 months 33 months
Commercial real estate | Term Extension | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification   65 months   65 months
Commercial real estate | Other-than-insignificant Payment Delay | Single Modifications        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification 0 months 0 months 0 months 0 months
Commercial real estate | Other-than-insignificant Payment Delay | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification   0 months   0 months
Commercial real estate | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 0 $ 75 $ 0 $ 75
Interest Rate Reduction (%) 0.00% 0.90% 0.00% 0.90%
Commercial real estate | Principal Forgiveness | Single Modifications        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 0 $ 0 $ 0 $ 0
Commercial real estate | Principal Forgiveness | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount   $ 0   $ 0
Commercial real estate | Interest Rate Reduction | Single Modifications        
Financing Receivable, Modified [Line Items]        
Interest Rate Reduction (%) 0.00% 0.00% 0.00% 0.00%
Commercial real estate | Interest Rate Reduction | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Interest Rate Reduction (%)   0.60%   0.60%
Securities-based lending and Other | Term Extension        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount     $ 4 $ 33
Interest Rate Reduction (%)     0.00% 0.00%
Securities-based lending and Other | Term Extension | Single Modifications        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification 0 months   24 months 12 months
Securities-based lending and Other | Other-than-insignificant Payment Delay        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 5 $ 0 $ 5 $ 29
Interest Rate Reduction (%) 0.00% 0.00% 0.00% 0.00%
Securities-based lending and Other | Other-than-insignificant Payment Delay | Single Modifications        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification 4 months   4 months 11 months
Securities-based lending and Other | Principal Forgiveness | Single Modifications        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 0   $ 0 $ 0
Securities-based lending and Other | Interest Rate Reduction | Single Modifications        
Financing Receivable, Modified [Line Items]        
Interest Rate Reduction (%) 0.00%   0.00% 0.00%
Residential real estate | Term Extension | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification   120 months   120 months
Residential real estate | Other-than-insignificant Payment Delay | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Weighted average term increase from modification   0 months   0 months
Residential real estate | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount $ 0 $ 2 $ 0 $ 2
Interest Rate Reduction (%) 0.00% 0.00% 0.00% 0.00%
Residential real estate | Principal Forgiveness | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount   $ 0   $ 0
Residential real estate | Interest Rate Reduction | Multiple Modifications - Term Extension and Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Interest Rate Reduction (%)   1.00%   1.00%