Discontinued Operations - Loss, Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of income taxes	$ (0.8)	$ (2.0)
Discontinued Operations, Held-for-sale or Disposed of by Sale
Liabilities:
Accounts payable and accrued expenses	45.0		$ 45.0
Other noncurrent liabilities	58.7		59.0
Total liabilities classified as discontinued operations	$ 103.7		$ 104.0