Income Taxes	3 Months Ended
Mar. 31, 2017
Income Taxes	Note 13. Income Taxes Based on current tax laws, our estimated annual effective tax rate for 2017 is 26.3%, reflecting favorable impacts from the mix of pre-tax income in various non-U.S. tax jurisdictions, partially offset by an increase in domestic earnings as compared to the prior year. Our 2017 first quarter effective tax rate of 21.4% was favorably impacted by net tax benefits from $36 million of discrete one-time events. The discrete net tax benefits primarily consisted of a $16 million benefit from release of uncertain tax positions due to expirations of statutes of limitations and audit settlements in several jurisdictions and a $16 million benefit relating to the U.S. domestic production activities deduction. As of the first quarter of 2016, our estimated annual effective tax rate for 2016 was 22.0%, reflecting favorable impacts from the mix of pre-tax income in various non-U.S. tax jurisdictions. Our 2016 first quarter effective tax rate of 10.3% was favorably impacted by net tax benefits from $56 million of discrete one-time events. The discrete net tax benefits primarily consisted of a $39 million benefit from release of uncertain tax positions due to expirations of statutes of limitations in several jurisdictions.

Income Taxes

3 Months Ended

Mar. 31, 2017

Note 13. Income Taxes

Based on current tax laws, our estimated annual effective tax rate for 2017 is 26.3%, reflecting favorable impacts from the mix of pre-tax income in various non-U.S. tax jurisdictions, partially offset by an increase in domestic earnings as compared to the prior year. Our 2017 first quarter effective tax rate of 21.4% was favorably impacted by net tax benefits from $36 million of discrete one-time events. The discrete net tax benefits primarily consisted of a $16 million benefit from release of uncertain tax positions due to expirations of statutes of limitations and audit settlements in several jurisdictions and a $16 million benefit relating to the U.S. domestic production activities deduction.

As of the first quarter of 2016, our estimated annual effective tax rate for 2016 was 22.0%, reflecting favorable impacts from the mix of pre-tax income in various non-U.S. tax jurisdictions. Our 2016 first quarter effective tax rate of 10.3% was favorably impacted by net tax benefits from $56 million of discrete one-time events. The discrete net tax benefits primarily consisted of a $39 million benefit from release of uncertain tax positions due to expirations of statutes of limitations in several jurisdictions.