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Discontinued Operations (Details) - USD ($)
$ in Millions
6 Months Ended
Apr. 30, 2018
Jun. 30, 2018
Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Stock-based compensation   $ 2.1 $ 0.3
CRM Business Franchise      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Consideration transferred $ 195.9    
Consideration transferred, cash $ 9.2    
Transition services   0.9  
Capital expenditure   $ 0.9 2.4
Depreciation and amortization     $ 9.9