Income Taxes	9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rates were 6.1 percent and 24.1 percent for the three and nine months ended September 30, 2017, respectively, compared with 19.9 percent and 20.8 percent for the same respective periods of 2016. The decrease in the effective tax rate for the third quarter of 2017 is primarily due to the income tax benefit of acquired IPR&D charges and asset impairment, restructuring, and other special charges. The increase in the effective tax rate for the first nine months of 2017 is primarily due to the non-tax deductible $857.6 million acquired IPR&D charge for the acquisition of CoLucid, partially offset by the income tax benefit of acquired IPR&D charges and asset impairment, restructuring, and other special charges. During the first quarter of 2016, we completed and effectively settled the U.S. examination of tax years 2010-2012. As a result of this resolution, our gross uncertain tax positions were reduced by approximately $140 million, and our consolidated condensed results of operations benefited from an immaterial reduction in income tax expense. During 2016, we made cash payments of approximately $150 million related to tax years 2010-2012 after application of available tax credit carryforwards and carrybacks. The U.S. examination of tax years 2013-2015 began in 2016 and is ongoing. The resolution of matters in this audit period will likely extend beyond the next 12 months.

Income Taxes

The effective tax rates were 6.1 percent and 24.1 percent for the three and nine months ended September 30, 2017, respectively, compared with 19.9 percent and 20.8 percent for the same respective periods of 2016. The decrease in the effective tax rate for the third quarter of 2017 is primarily due to the income tax benefit of acquired IPR&D charges and asset impairment, restructuring, and other special charges. The increase in the effective tax rate for the first nine months of 2017 is primarily due to the non-tax deductible $857.6 million acquired IPR&D charge for the acquisition of CoLucid, partially offset by the income tax benefit of acquired IPR&D charges and asset impairment, restructuring, and other special charges.

During the first quarter of 2016, we completed and effectively settled the U.S. examination of tax years 2010-2012. As a result of this resolution, our gross uncertain tax positions were reduced by approximately $140 million, and our consolidated condensed results of operations benefited from an immaterial reduction in income tax expense. During 2016, we made cash payments of approximately $150 million related to tax years 2010-2012 after application of available tax credit carryforwards and carrybacks. The U.S. examination of tax years 2013-2015 began in 2016 and is ongoing. The resolution of matters in this audit period will likely extend beyond the next 12 months.