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Disposition of Subsidiaries (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Disposition of Subsidiaries [Abstract]        
Gain on disposition of subsidiary $ 0.0 $ 0.0 $ 78.8 $ 0.0