Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ (5.1)	$ 56.9	$ (1.6)	$ 48.7
Increase (decrease) due to tax audit settlements		$ (46.2)
Effective tax rate (as a percent)	38.30%
Discrete tax expense (benefit) from revaluation of deferred tax liabilities	$ 1.3		$ 0.8	$ 2.7