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Equity (Schedule of Stock by Class - Preferred) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Class of Stock [Line Items]      
Preferred Stock, Shares Outstanding 1,302,500 1,302,500  
Preferred Stock, Value, Outstanding $ 1,546.5 $ 1,546.5  
Series A Preferred Stock      
Class of Stock [Line Items]      
Preferred Stock, Liquidation Preference Per Share $ 1,000    
Preferred Stock, Shares Outstanding 400,000    
Preferred Stock, Dividends Per Share, Declared $ 56.50 $ 56.50 $ 56.50
Preferred Stock, Value, Outstanding $ 393.9 $ 393.9  
Series B Preferred Stock      
Class of Stock [Line Items]      
Preferred Stock, Liquidation Preference Per Share $ 25,000    
Preferred Stock, Shares Outstanding 20,000    
Preferred Stock, Dividends Per Share, Declared $ 1,625 $ 1,625 1,625
Preferred Stock, Value, Outstanding $ 486.1 $ 486.1  
Series C Preferred Stock      
Class of Stock [Line Items]      
Preferred Stock, Liquidation Preference Per Share $ 1,000    
Preferred Stock, Shares Outstanding 862,500    
Preferred Stock, Dividends Per Share, Declared $ 0 $ 0 $ 0
Preferred Stock, Value, Outstanding $ 666.5 $ 666.5