Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Taxes
Income tax benefit (expense)	$ 35.6	$ (0.4)	$ 84.4	$ (4.5)