Income Taxes - Summary (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income (loss) before income taxes	$ 151.5	$ (73.5)	$ 252.2	$ (181.7)
Provision for income taxes	$ 12.5	$ 78.4	$ 23.1	$ 11.5
Effective income tax provision rate (as a percent)	8.30%	(106.70%)	9.20%	(6.30%)