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Income Taxes
9 Months Ended
Sep. 30, 2020
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
 Quarter endedYear to date
 2020201920202019
Income tax provision$33 $45 $96 $170 
Effective tax rate10.5 %15.1 %14.4 %17.4 %
Our third quarter and year to date effective tax rates are lower than prior year primarily due to the favorable impact of the remeasurement of our deferred tax assets in the United Kingdom resulting from an increase in the corporate tax rate enacted in the quarter ended September 30, 2020 and return to provision adjustments from completing the 2019 U.S. federal income tax return. These favorable impacts were partially offset by lapping the favorable resolution in the prior year of an uncertain tax position in a foreign market and lapping higher excess tax benefits on share-based compensation.