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Income Taxes (Tables)
9 Months Ended
Sep. 30, 2021
Income Tax Disclosure [Abstract]  
Income Tax And Effective Tax Rate
 Quarter endedYear to date
 2021202020212020
Income tax (benefit) provision$(77)$33 $22 $96 
Effective tax rate(17.0)%10.5 %1.8 %14.4 %