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Income Taxes
6 Months Ended
Jun. 30, 2020
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes 

The provision for income taxes reflected an estimated annual tax rate of 27 percent in the second quarter of 2020, compared with 29 percent in the second quarter of 2019, excluding a discrete item in the second quarter of 2019 of $13 million for a valuation allowance against the deferred tax assets of a non-U.S. subsidiary. The decrease in the estimated annual tax rate was primarily due to changes in the geographic mix of profits.