v3.26.1
Borrowings and Federal Home Loan Bank Advances (Narrative) (Details)
3 Months Ended 6 Months Ended
Feb. 04, 2026
USD ($)
Mar. 31, 2026
USD ($)
Jun. 30, 2026
USD ($)
Item
Short-term Debt [Line Items]      
Uncommitted secured lines of credit   $ 100,000,000 $ 780,000,000
Number of banks | Item     3
Daily borrowings under our uncommitted secured lines     $ 100,000,000
Compensating balances     0
Federal Home Loan Bank advances     450,000,000
Outstanding credit facility     0
Two Thousand and Twenty Three Credit Agreement Amended [Member]      
Short-term Debt [Line Items]      
Outstanding credit facility     0
Unsecured Debt [Member]      
Short-term Debt [Line Items]      
Aggregate borrowings $ 1,000,000,000    
Credit agreement maturity date Feb. 04, 2031    
Company Owned Securities [Member]      
Short-term Debt [Line Items]      
Uncommitted secured lines of credit     0
Uncommitted unsecured lines of credit     $ 0
Federal Home Loan Bank advances [Member]      
Short-term Debt [Line Items]      
Weighted average interest rate on borrowings     3.35%