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Contingencies - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended
Jun. 30, 2019
Apr. 30, 2019
Jan. 31, 2017
Dec. 31, 2018
Loss Contingencies [Line Items]        
Accrual of loss contingency $ 8.0      
Estimate of possible loss 300.0      
Unrecognized tax benefits 104.0     $ 108.0
Payments for settlements 48.8      
Invoicing Matter        
Loss Contingencies [Line Items]        
Amount awarded to other party 5.5   $ 40.0  
Shareholder Litigation        
Loss Contingencies [Line Items]        
Amount awarded to other party   $ 4.9    
Legal Reserve | Invoicing Matter        
Loss Contingencies [Line Items]        
Estimate of possible loss $ 380.0