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Income Taxes - Schedule of Income Tax Expense (Benefit) on Income from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ (0.1)	$ (1.6)	$ (0.3)
State	(0.3)	(0.4)	0.0
Current	(0.4)	(2.0)	(0.3)
Deferred:
Federal	0.0	0.0	14.0
State	0.0	0.0	2.6
Deferred	0.0	0.0	16.6
Income tax expense (benefit)	$ (0.4)	$ (2.0)	$ 16.3

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Income Tax Expense (Benefit), Net of REIT Conversion

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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

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