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Temporary Equity, Equity and Dividends (Schedule of Quarterly Dividends Declared and Paid) (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended
Mar. 07, 2023
Sep. 30, 2023
Sep. 30, 2022
Fourth quarter 2022      
Dividends Payable [Line Items]      
Dividend per share (usd per share)   $ 0.27  
Total dividends   $ 30.0  
Special Dividend      
Dividends Payable [Line Items]      
Dividend per share (usd per share) $ 1.08 $ 1.08  
Total dividends   $ 120.4  
First quarter 2023      
Dividends Payable [Line Items]      
Dividend per share (usd per share)   $ 0.27  
Total dividends   $ 49.1  
Second quarter 2023      
Dividends Payable [Line Items]      
Dividend per share (usd per share)   $ 0.27  
Total dividends   $ 49.2  
Fourth quarter 2021      
Dividends Payable [Line Items]      
Dividend per share (usd per share)     $ 0.25
Total dividends     $ 27.7
First quarter 2022      
Dividends Payable [Line Items]      
Dividend per share (usd per share)     $ 0.25
Total dividends     $ 27.7
Second quarter 2022      
Dividends Payable [Line Items]      
Dividend per share (usd per share)     $ 0.27
Total dividends     $ 29.9