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Equity Schedule of Stock by Class - Preferred (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Class of Stock [Line Items]          
Preferred Stock, Shares Outstanding 1,302,500   1,302,500   440,000
Shares outstanding $ 6,494.9   $ 6,494.9   $ 5,752.2
Series A Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Liquidation Preference Per Share $ 1,000   $ 1,000    
Preferred Stock, Shares Outstanding 400,000   400,000    
Dividends Declared Per Share $ 28.25 $ 28.25 $ 56.50 $ 56.50  
Series B Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Liquidation Preference Per Share $ 25,000   $ 25,000    
Preferred Stock, Shares Outstanding 20,000   20,000    
Dividends Declared Per Share $ 406.25 406.25 $ 1,625 1,625  
Series B-1 Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Shares Outstanding 20,000   20,000    
Series C Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Liquidation Preference Per Share $ 1,000   $ 1,000    
Preferred Stock, Shares Outstanding 862,500   862,500    
Dividends Declared Per Share $ 0 $ 0 $ 0 $ 0  
Preferred Stock | Series A Preferred Stock          
Class of Stock [Line Items]          
Shares outstanding $ 393.9   $ 393.9   393.9
Preferred Stock | Series B Preferred Stock          
Class of Stock [Line Items]          
Shares outstanding 486.1   486.1   486.1
Preferred Stock | Series C Preferred Stock          
Class of Stock [Line Items]          
Shares outstanding $ 839.8   $ 839.8   $ 0.0