Income taxes	9 Months Ended
Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income taxes	Note 7. Income taxes Our consolidated effective income tax rates for the third quarter and first nine months of 2018 were 19.2% and 19.1%, respectively, and 25.3% and 27.2% in the third quarter and first nine months of 2017, respectively. Our effective income tax rate normally reflects recurring benefits from: (a) dividends received deductions applicable to certain investments in equity securities and (b) income production tax credits related to wind-powered electricity generation placed in service in the U.S. In 2018, our effective income tax rate reflects the current U.S. statutory rate of 21%, while the rate for 2017 reflects the then current U.S. statutory rate of 35%. The relative mix of pre-tax earnings or losses and underlying income tax rates applicable to the various taxing jurisdictions can also affect our periodic consolidated effective income tax rate. In December 2017, the Securities and Exchange Commission issued Staff Accounting Bulletin 118 (“SAB 118”) to provide clarification in implementing the Tax Cuts and Jobs Act of 2017 (“TCJA”) when registrants do not have the necessary information available to complete the accounting for an element of the TCJA in the period of its enactment. SAB 118 provides for tax amounts to be classified as provisional and subject to remeasurement for up to one year from the enactment date for such elements when the accounting effect is not complete, but can be reasonably estimated. We recorded income tax expense of approximately $1.4 billion in the fourth quarter of 2017, representing our provisional estimate of the U.S. Federal and state income taxes on the deemed repatriation of accumulated undistributed earnings of foreign subsidiaries. We continue to consider this estimate to be provisional and subject to remeasurement when we obtain the necessary additional information to complete the measurement. As of September 30, 2018, we had not finalized the inputs to the foreign earnings and profits calculations, the basis on which income taxes are determined. Our accounting for the repatriation tax under the TCJA will be completed during the fourth quarter of 2018. We do not anticipate significant adjustments to the provisional estimates.

Note 7. Income taxes

Our consolidated effective income tax rates for the third quarter and first nine months of 2018 were 19.2% and 19.1%, respectively, and 25.3% and 27.2% in the third quarter and first nine months of 2017, respectively. Our effective income tax rate normally reflects recurring benefits from: (a) dividends received deductions applicable to certain investments in equity securities and (b) income production tax credits related to wind-powered electricity generation placed in service in the U.S. In 2018, our effective income tax rate reflects the current U.S. statutory rate of 21%, while the rate for 2017 reflects the then current U.S. statutory rate of 35%. The relative mix of pre-tax earnings or losses and underlying income tax rates applicable to the various taxing jurisdictions can also affect our periodic consolidated effective income tax rate.

In December 2017, the Securities and Exchange Commission issued Staff Accounting Bulletin 118 (“SAB 118”) to provide clarification in implementing the Tax Cuts and Jobs Act of 2017 (“TCJA”) when registrants do not have the necessary information available to complete the accounting for an element of the TCJA in the period of its enactment. SAB 118 provides for tax amounts to be classified as provisional and subject to remeasurement for up to one year from the enactment date for such elements when the accounting effect is not complete, but can be reasonably estimated. We recorded income tax expense of approximately $1.4 billion in the fourth quarter of 2017, representing our provisional estimate of the U.S. Federal and state income taxes on the deemed repatriation of accumulated undistributed earnings of foreign subsidiaries. We continue to consider this estimate to be provisional and subject to remeasurement when we obtain the necessary additional information to complete the measurement. As of September 30, 2018, we had not finalized the inputs to the foreign earnings and profits calculations, the basis on which income taxes are determined. Our accounting for the repatriation tax under the TCJA will be completed during the fourth quarter of 2018. We do not anticipate significant adjustments to the provisional estimates.