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Receivables (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jan. 01, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Accumulated deficit   $ 472.0   $ 472.0   $ 423.5
Allowances for doubtful accounts   33.8   33.8   $ 25.0
Deferred income taxes       27.2 $ (58.3)  
Provisions   $ (0.9) $ 0.9 $ 5.1 $ 2.6  
Accounting Standards Update 2016-13            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Accumulated deficit $ 6.3          
Allowances for doubtful accounts 8.4          
Deferred income taxes $ (2.1)