v3.26.1
Commitments and Contingencies (Narrative) (Details)
$ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
entity
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
Commitments and Contingencies Disclosure [Abstract]        
Financial guarantees in connection with standby letters of credit   $ 0 $ 0  
Standby letters of credit expiring within one year   424    
Standby letters of credit expiring thereafter   $ 14    
iCap Entities [Member]        
Concentration Risk [Line Items]        
Number of defendant entities | entity 34      
Loss contingency, damages sought, value $ 290      
Product Concentration Risk | Revenue Benchmark | Real Estate Loans As Part Of Loan Portfolio        
Concentration Risk [Line Items]        
Concentration risk (as a percent)   75.00%   76.00%
Product Concentration Risk | Revenue Benchmark | Multifamily Loans as Part of Loan portfolio        
Concentration Risk [Line Items]        
Concentration risk (as a percent)   24.00%   24.00%
Product Concentration Risk | Revenue Benchmark | Commercial Office Loans as Part of Loan portfolio        
Concentration Risk [Line Items]        
Concentration risk (as a percent)   8.00%   8.00%