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Temporary Equity, Equity and Dividends (Schedule of Quarterly Dividends Declared and Paid) (Details) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Mar. 07, 2023
Jun. 30, 2023
Jun. 30, 2022
Special Dividend [Member]      
Dividends Payable [Line Items]      
Dividend per share $ 1.08 $ 1.08  
Total dividends   $ 120.4  
Fourth quarter 2021      
Dividends Payable [Line Items]      
Dividend per share     $ 0.25
Total dividends     $ 27.7
First quarter 2022      
Dividends Payable [Line Items]      
Dividend per share     $ 0.25
Total dividends     $ 27.7
Fourth Quarter 2022 [Member]      
Dividends Payable [Line Items]      
Dividend per share   $ 0.27  
Total dividends   $ 30.0  
First quarter 2023      
Dividends Payable [Line Items]      
Dividend per share   $ 0.27  
Total dividends   $ 49.1