v3.25.4
Bank Loans and Related Allowance for Credit Losses - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accrued interest $ 223 $ 171
Total bank loans 57,991 45,236
Residential real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total bank loans 30,911 27,813
First Mortgages | Residential real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Bank loans $ 26,200  
Percent of loans with interest-only payments 23.00%  
Percent of interest-only adjustable rate 66.00%  
Total bank loans $ 30,484 27,389
First Mortgages | Minimum | Residential real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fixed rate interest rate period 3 years  
Adjusting rate interest rate period 6 months  
Interest-only reset period 3 years  
First Mortgages | Maximum | Residential real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fixed rate interest rate period 10 years  
Adjusting rate interest rate period 12 months  
HELOCs | Residential real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loan term 30 years  
Initial draw period 10 years  
Converting to amortizing loan period 20 years  
Total bank loans $ 427 $ 424
Percent of loan balance outstanding, borrowers paid only minimum due 61.00%  
Home Equity Secured By Second Liens | Residential real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total bank loans $ 329