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Discontinued Operations - Loss, Assets and Liabilities of Discontinued Operations (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Loss from discontinued operations, net of income taxes $ (2.2) $ (3.4)  
Discontinued Operations, Held-for-sale or Disposed of by Sale      
Liabilities:      
Accounts payable and accrued expenses 58.4   $ 58.8
Other noncurrent liabilities 105.1   105.5
Total liabilities classified as discontinued operations $ 163.5   $ 164.3