Income Taxes - Summary of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred income tax assets:
Federal net operating loss carryforward	$ 573.6	$ 488.3
State net operating loss carryforward	59.6	61.0
Total deferred tax assets, gross	633.2	549.3
Valuation allowance	(151.6)	(153.3)
Total deferred tax assets, net of valuation allowance	481.6	396.0
Deferred tax liabilities:
Property, plant, equipment, and intangible assets	(619.1)	(504.6)
Total deferred tax liabilities	(619.1)	(504.6)
Deferred tax liability, net	$ (137.5)	$ (108.6)