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Commitments And Contingencies Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Loss Contingencies [Line Items]          
Income tax expense $ 6.8   $ 12.2 $ 13.7 $ 38.1
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