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Changes in Capital Structure - Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Mar. 09, 2023
Sep. 30, 2023
Sep. 30, 2023
Sep. 30, 2023
Sep. 30, 2022
Class of Stock [Line Items]          
Proceeds from issuance of preferred stock       $ 635 $ 0
Dividends per preferred share (in usd per share)     $ 52.96    
Series A Preferred Stock dividends [1]     $ 34    
Series A Preferred Stock          
Class of Stock [Line Items]          
Dividends per preferred share (in usd per share)   $ 52.96      
Series A Preferred Stock dividends   $ 34      
Series A Preferred Stock | Preferred Stock          
Class of Stock [Line Items]          
Issuance of Series A Preferred Stock (in shares) 650,000     650,000  
Preferred stock, dividend rate, percentage 10.25%        
Proceeds from issuance of preferred stock $ 635        
Series A Preferred Stock | Preferred Stock | US Treasury (UST) Interest Rate          
Class of Stock [Line Items]          
Preferred stock, dividend rate, floor 1.00%        
Preferred stock, liquidation preference (in usd per share) $ 1,000        
Preferred stock, dividend rate, basis spread on variable rate 5.92%        
[1] Dividend per Series A Preferred Stock was $52.96