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Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Dec. 31, 2022
Apr. 19, 2021
Preferred Stock, Shares Authorized 20,000,000   20,000,000 20,000,000  
Preferred Stock, Shares Outstanding 902,500   902,500 902,500  
Preferred Stock, Par or Stated Value Per Share $ 0.01   $ 0.01 $ 0.01  
Equity Units Stock Purchase Contract Liability Payments     $ 33.4    
Series A Corporate Units          
Shares Issued, Price Per Share         $ 100
Shares To Be Issued Under Stock Purchase Contracts     35,200,000    
Series C Preferred Stock          
Shares To Be Issued Under Stock Purchase Contracts     35,200,000    
Series A Corporate Units          
Shares Issued, Price Per Share         100
At The Market Program          
Common Stock Aggregate Sale Price     $ 750.0    
ATM Program Equity Remaining Available for Issuance     $ 300.0    
Series A Preferred Stock          
Preferred Stock, Shares Outstanding 0   0    
Preferred Stock, Amount of Preferred Dividends in Arrears $ 1.0 $ 1.0      
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears $ 2.51 $ 2.51      
Series B Preferred Stock          
Preferred Stock, Shares Outstanding 20,000   20,000    
Preferred Stock, Amount of Preferred Dividends in Arrears $ 1.4 $ 1.4      
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears $ 72.23 $ 72.23      
Series B-1 Preferred Stock          
Preferred Stock, Shares Outstanding 20,000   20,000    
Series C Preferred Stock          
Preferred Stock, Shares Outstanding 862,500   862,500    
Preferred Stock, Par or Stated Value Per Share         $ 0.01
Undivided Beneficial Ownership Interest, Percent         10.00%