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 provision (benefit)	$ 46.5	$ 10.7	$ 238.7	$ 21.0
Foreign Tax Authority
Income Taxes
Remeasurement of income tax	$ (3.3)	$ (1.6)	$ (2.6)	$ (3.5)