Income taxes	6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income taxes	Note 21. Income taxes Our consolidated effective income tax rates for the second quarter and first six months of 2019 were 20.2% and 20.9%, respectively, and 20.0% and 18.9% in the second quarter and first six months of 2018, respectively. Our effective income tax rate normally reflects recurring benefits from dividends-received deductions applicable to investments in equity securities and production tax credits related to wind-powered electricity generation placed in service in the U.S. Our periodic effective income tax rate will also vary due to the changes in mix of pre-tax earnings and underlying income tax rates applicable in the various taxing jurisdictions. In the first quarter of 2019, we recorded income tax expense of $377 million for uncertain tax positions related to investments in certain tax equity investment funds that generated income tax benefits from 2015 through 2018. We now believe that it is more likely than not those income tax benefits are not valid.

Income taxes

6 Months Ended

Jun. 30, 2019

Note 21. Income taxes

Our consolidated effective income tax rates for the second quarter and first six months of 2019 were 20.2% and 20.9%, respectively, and 20.0% and 18.9% in the second quarter and first six months of 2018, respectively. Our effective income tax rate normally reflects recurring benefits from dividends-received deductions applicable to investments in equity securities and production tax credits related to wind-powered electricity generation placed in service in the U.S. Our periodic effective income tax rate will also vary due to the changes in mix of pre-tax earnings and underlying income tax rates applicable in the various taxing jurisdictions. In the first quarter of 2019, we recorded income tax expense of $377 million for uncertain tax positions related to investments in certain tax equity investment funds that generated income tax benefits from 2015 through 2018. We now believe that it is more likely than not those income tax benefits are not valid.