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Discontinued Operations (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Apr. 30, 2018
Sep. 30, 2018
Sep. 30, 2018
Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Stock-based compensation     $ 2.1 $ 0.6
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   $ 1.1 2.0  
Capital expenditure     $ 0.9 4.3
Depreciation and amortization       $ 15.4