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Commitments And Contingencies Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Loss Contingencies [Line Items]            
Income tax expense $ 3.8     $ 15.3 $ 6.9 $ 25.9
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil            
Loss Contingencies [Line Items]            
Brazil Tax Credits   $ 3.3 $ 4.3      
Income tax expense     $ 1.6