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Income Taxes
9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]  
Income Taxes
INCOME TAXES
 
Effective January 1, 2017 we adopted ASU 2016-09, which requires the tax effects related to employee share-based payments to be recorded to income tax expense, thus increasing the volatility in our effective tax rate.

Our effective tax rate was 38 percent and 36 percent for the three-month periods ended September 30, 2017 and 2016, respectively. The increase in the rate is primarily due to a change in the mix of earnings from lower to higher tax jurisdictions.

Our effective tax rate was 34 percent and 35 percent for the nine-month periods ended September 30, 2017 and 2016, respectively.  The decrease in the rate is primarily due to income tax benefits on employee share-based payments, partially offset by a change in the mix of earnings from lower to higher tax jurisdictions.