Income Taxes	6 Months Ended
Jun. 30, 2016
Income Taxes	Note 13. Income Taxes Based on current tax laws, our estimated annual effective tax rate for 2016 is 22.5%, reflecting favorable impacts from the mix of pre-tax income in various non-U.S. tax jurisdictions. Our 2016 second quarter effective tax rate of 24.2% includes net expense from discrete one-time events of $6 million, mainly due to interest accruals on uncertain tax positions. Our effective tax rate for the six months ended June 30, 2016 of 17.3% was favorably impacted by net tax benefit from $49 million of discrete one-time events. The discrete net tax benefit primarily consisted of a $39 million benefit from release of uncertain tax positions due to expirations of statutes of limitations in several jurisdictions. As of the second quarter of 2015, our estimated annual effective tax rate for 2015 was 19.0%, reflecting favorable impacts from the mix of pre-tax income in various non-U.S. tax jurisdictions. Our 2015 second quarter effective tax rate of 19.0% included net tax expense from $8 million of discrete one-time events. The discrete net tax expense primarily consisted of $22 million related to the sale of our interest in AGF, partially offset by $11 million related to favorable audit settlements and expirations of statutes of limitations in several jurisdictions. Our effective tax rate for the six months ended June 30, 2015 of 22.4% was unfavorably impacted by net tax expense from $33 million of discrete one-time events. The discrete net tax expense primarily consisted of $54 million of tax charges related to the sale of our interest in AGF ($32 million in the first quarter upon the investment’s change to held-for-sale status and an additional $22 million upon the closing of the sale in the second quarter), partially offset by $33 million from favorable audit settlements and expirations of statutes of limitations in several jurisdictions.

Income Taxes

6 Months Ended

Jun. 30, 2016

Note 13. Income Taxes

Based on current tax laws, our estimated annual effective tax rate for 2016 is 22.5%, reflecting favorable impacts from the mix of pre-tax income in various non-U.S. tax jurisdictions. Our 2016 second quarter effective tax rate of 24.2% includes net expense from discrete one-time events of $6 million, mainly due to interest accruals on uncertain tax positions. Our effective tax rate for the six months ended June 30, 2016 of 17.3% was favorably impacted by net tax benefit from $49 million of discrete one-time events. The discrete net tax benefit primarily consisted of a $39 million benefit from release of uncertain tax positions due to expirations of statutes of limitations in several jurisdictions.

As of the second quarter of 2015, our estimated annual effective tax rate for 2015 was 19.0%, reflecting favorable impacts from the mix of pre-tax income in various non-U.S. tax jurisdictions. Our 2015 second quarter effective tax rate of 19.0% included net tax expense from $8 million of discrete one-time events. The discrete net tax expense primarily consisted of $22 million related to the sale of our interest in AGF, partially offset by $11 million related to favorable audit settlements and expirations of statutes of limitations in several jurisdictions. Our effective tax rate for the six months ended June 30, 2015 of 22.4% was unfavorably impacted by net tax expense from $33 million of discrete one-time events. The discrete net tax expense primarily consisted of $54 million of tax charges related to the sale of our interest in AGF ($32 million in the first quarter upon the investment’s change to held-for-sale status and an additional $22 million upon the closing of the sale in the second quarter), partially offset by $33 million from favorable audit settlements and expirations of statutes of limitations in several jurisdictions.