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INCOME TAX
 6 Months Ended
Jun. 30, 2021
Income Tax Disclosure [Abstract]  
INCOME TAX INCOME TAX
Our effective income tax rates for the three and six months ended June 30, 2021 were 21.2% and 16.8%, respectively. Our effective income tax rate for the three and six months ended June 30, 2021 differed from the U.S. statutory rate primarily as a result of foreign interest income not subject to tax, tax credits and the foreign-derived intangible income deduction, each favorably affecting the effective rate, and the effect of enacted tax law changes in the U.K. which required a remeasurement of deferred tax balances raising the effective rate. A change in the assessment of the need for a valuation allowance related to foreign tax credit carryforwards also had a favorable effect on the effective income tax rate for the six months ended June 30, 2021.

Our effective income tax rates for three and six months ended June 30, 2020 were 3.0% and 9.0%, respectively. Our effective income tax rate for the three and six months ended June 30, 2020 differed from the U.S. statutory rate primarily as a result of tax credits, excess tax benefits of share-based awards and the foreign-derived intangible income deduction. The prior year effective tax rates were unusually low due to the effects of permanent differences on the lower income before income taxes.