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Income Taxes
3 Months Ended
Mar. 31, 2014
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes 

The Provision for income taxes reflects an estimated annual tax rate of 26 percent for the first quarter of 2014 compared with 27 percent in the first quarter of 2013. The decrease in rate is primarily due to changes in the geographic mix of pre-tax profits. The first-quarter 2013 estimated annual tax rate of 27 percent excludes a benefit of $7 million, reflecting the impact of the American Taxpayer Relief Act.