Income Taxes - Components of The Provision For Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Current income tax expense	$ (0.8)	$ (1.1)	$ 0.0
Deferred tax expense	(24.6)	(142.1)	(6.9)
Total income tax expense	$ (25.4)	$ (143.2)	$ (6.9)