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INCOME TAX
9 Months Ended
Sep. 30, 2020
Income Tax Disclosure [Abstract]  
INCOME TAX INCOME TAX
Our effective income tax rates for the three and nine months ended September 30, 2020 were 18.0% and 14.1%, respectively. Our effective income tax rate for the three months ended September 30, 2020 differed from the U.S. statutory rate primarily due to tax credits, foreign interest income not subject to tax, the foreign-derived intangible income deduction, changes in uncertain tax positions and the tax effect of the U.K. statutory income tax rate change that took effect during the quarter. Our effective income tax rate for the nine months ended September 30, 2020 differed from the U.S. statutory rate primarily due to tax credits, foreign interest income not subject to tax, the foreign-derived intangible income deduction and excess tax benefits of share-based awards.

Our effective income tax rate for the three months ended September 30, 2019 was a benefit of 18.7%, and our effective income tax rate for the nine months ended September 30, 2019 was 10.1%. Our effective income tax rates for those periods differed from the U.S. statutory rate primarily due to the reduction of our U.S. deferred tax liability resulting from the effects of the Merger on the apportionment of income among states, excess tax benefits of share-based awards, the U.S. tax benefits associated with income derived from foreign sources and the benefits related to the effective settlement of uncertain tax positions.

We conduct business globally and file income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business, we are subject to examination by taxing authorities around the world. We are no longer subject to state income tax examinations for years ended on or before May 31, 2007, U.S. federal income tax examinations for years ended on or before May 31, 2016 and U.K. federal income tax examinations for years ended on or before May 31, 2016.