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Subsequent Events (Narrative) (Details) - $ / shares
May 07, 2024
Apr. 05, 2024
Jun. 10, 2020
Nov. 21, 2019
May 02, 2024
Mar. 31, 2024
Dec. 31, 2023
Subsequent Event [Line Items]              
Common stock, par value (dollars per share)           $ 1 $ 1
Depositary Shares, each representing a 1/1,000th interest in a share of 6.625% Fixed-Rate Reset Non-Cumulative Preferred Stock, Series B              
Subsequent Event [Line Items]              
Preferred stock, dividend rate, percentage     6.625%        
Preferred stock, par value (dollars per share)     $ 1.00     1 1
Depositary Shares, each representing a 1/1,000th interest in a share of 5.95% Fixed-Rate Reset Non-Cumulative Preferred Stock, Series A              
Subsequent Event [Line Items]              
Preferred stock, dividend rate, percentage       5.95%      
Preferred stock, par value (dollars per share)       $ 1.00   $ 1 $ 1
Subsequent Event              
Subsequent Event [Line Items]              
Common stock dividend declared, per share   $ 0.38          
Subsequent Event | Depositary Shares, each representing a 1/1,000th interest in a share of 6.625% Fixed-Rate Reset Non-Cumulative Preferred Stock, Series B              
Subsequent Event [Line Items]              
Preferred stock dividends declared, per share $ 414.0625000            
Preferred stock dividends declared, per depositary share $ 0.414062500            
Preferred stock, dividend rate, percentage 6.625%            
Preferred stock, par value (dollars per share) $ 1.00            
Subsequent Event | Depositary Shares, each representing a 1/1,000th interest in a share of 5.95% Fixed-Rate Reset Non-Cumulative Preferred Stock, Series A              
Subsequent Event [Line Items]              
Preferred stock dividends declared, per share 371.8750000            
Preferred stock dividends declared, per depositary share $ 0.371875000            
Preferred stock, dividend rate, percentage 5.95%            
Preferred stock, par value (dollars per share) $ 1.00            
Subsequent Event | Brookfield Reinsurance Ltd.              
Subsequent Event [Line Items]              
Common stock, par value (dollars per share)         $ 1.00    
Business acquisition, share price (in dollars per share)         $ 38.85    
Business acquisition, stock consideration         0.45464