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Income Taxes
6 Months Ended
Jul. 04, 2015
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes

We determine the tax provision for interim periods using an estimate of our annual effective tax rate, adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter we update our estimate of the annual effective tax rate, and if our estimated tax rate changes, we make a cumulative adjustment.

Our effective tax rate was 33.1% and 33.8% for the first six months of 2015 and 2014, respectively. The decrease in the 2015 effective tax rate results principally from the favorability of net discrete items recorded in 2015 as compared to 2014.