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Stockholders' Equity - Dividends (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2021
Jun. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Class of Stock [Line Items]              
Dividends recorded on preferred stock $ 14.0     $ 14.0   $ 43.0 $ 30.0
Class A and Class B Common Stock              
Class of Stock [Line Items]              
Dividends per common share (in dollars per share) $ 0.24     $ 0.24   $ 0.72 $ 0.72
Dividends recorded on common stock $ 159.0     $ 159.0   $ 477.0 $ 468.0
Series A Convertible Preferred Stock              
Class of Stock [Line Items]              
Dividends per preferred share (in dollars per share) $ 1.4375 $ 1.4375 $ 1.4375 $ 1.4375 $ 1.5493    
Dividends recorded on preferred stock $ 14.4     $ 14.4   $ 43.1 $ 29.9