Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Deferred tax liabilities	$ 111.0		$ 108.6
Deferred tax assets	404.5		396.0
Deferred tax assets, valuation allowance	(154.5)		$ (153.3)
Change in valuation allowance	$ (1.2)	$ 0.0