v3.26.1
Shareholders' Equity - Schedule of Stockholders Equity (Details)
 6 Months Ended
Jun. 30, 2026
USD ($)
$ / shares
shares
Series D Preferred Stock  
Class of Stock [Line Items]  
Preferred stock, dividend rate (as a percent) 5.00%
Preferred stock, amount outstanding | $ $ 525,000,000
Book value (net of capital surplus) | $ $ 519,000,000
Preferred stock, shares authorized (in shares) | shares 21,000
Preferred stock, shares outstanding (in shares) | shares 21,000
Preferred stock, par value (in usd per share) | $ / shares $ 1
Liquidation preference | $ $ 25,000
Ownership interest per depositary share ratio 0.04
Preferred stock, liquidation preference per depositary share (in usd per share) | $ / shares $ 1,000
Dividends paid per depositary share (in usd per share) | $ / shares $ 12.50
Series E Preferred Stock  
Class of Stock [Line Items]  
Preferred stock, dividend rate (as a percent) 6.125%
Preferred stock, amount outstanding | $ $ 500,000,000
Book value (net of capital surplus) | $ $ 490,000,000
Preferred stock, shares authorized (in shares) | shares 500,000
Preferred stock, shares outstanding (in shares) | shares 500,000
Preferred stock, par value (in usd per share) | $ / shares $ 1
Liquidation preference | $ $ 1,000
Ownership interest per depositary share ratio 0.025
Preferred stock, liquidation preference per depositary share (in usd per share) | $ / shares $ 25
Dividends paid per depositary share (in usd per share) | $ / shares $ 0.382813
Series F Preferred Stock  
Class of Stock [Line Items]  
Preferred stock, dividend rate (as a percent) 5.65%
Preferred stock, amount outstanding | $ $ 425,000,000
Book value (net of capital surplus) | $ $ 412,000,000
Preferred stock, shares authorized (in shares) | shares 425,000
Preferred stock, shares outstanding (in shares) | shares 425,000
Preferred stock, par value (in usd per share) | $ / shares $ 1
Liquidation preference | $ $ 1,000
Ownership interest per depositary share ratio 0.025
Preferred stock, liquidation preference per depositary share (in usd per share) | $ / shares $ 25
Dividends paid per depositary share (in usd per share) | $ / shares $ 0.353125
Series G Preferred Stock  
Class of Stock [Line Items]  
Preferred stock, dividend rate (as a percent) 5.625%
Preferred stock, amount outstanding | $ $ 450,000,000
Book value (net of capital surplus) | $ $ 435,000,000
Preferred stock, shares authorized (in shares) | shares 450,000
Preferred stock, shares outstanding (in shares) | shares 450,000
Preferred stock, par value (in usd per share) | $ / shares $ 1
Liquidation preference | $ $ 1,000
Ownership interest per depositary share ratio 0.025
Preferred stock, liquidation preference per depositary share (in usd per share) | $ / shares $ 25
Dividends paid per depositary share (in usd per share) | $ / shares $ 0.351563
Series H Preferred Stock  
Class of Stock [Line Items]  
Preferred stock, dividend rate (as a percent) 6.20%
Preferred stock, amount outstanding | $ $ 600,000,000
Book value (net of capital surplus) | $ $ 590,000,000
Preferred stock, shares authorized (in shares) | shares 600,000
Preferred stock, shares outstanding (in shares) | shares 600,000
Preferred stock, par value (in usd per share) | $ / shares $ 1
Liquidation preference | $ $ 1,000
Ownership interest per depositary share ratio 0.025
Preferred stock, liquidation preference per depositary share (in usd per share) | $ / shares $ 25
Dividends paid per depositary share (in usd per share) | $ / shares $ 0.387500