Income Taxes	6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate was 24% and 27% for the six months ended June 30, 2018 and 2017, respectively, and 24% and 25% for the three months ended June 30, 2018 and 2017, respectively. The effective tax rates for the six months and three months ended June 30, 2018 are lower than the effective tax rates for the comparable periods in 2017 primarily due to the enactment of the TCJA on December 22, 2017, which reduced the U.S. federal corporate income tax rate from 35% to 21%, effective January 1, 2018 (Note 2). That benefit is partially offset by additional U.S. federal and state income taxes on a portion of our non-U.S. income due to certain international tax provisions enacted as part of the TCJA, as well as tax benefits associated with a divestiture in the comparable periods in 2017. We recorded our income tax provision based on the TCJA as enacted as of June 30, 2018. We have also made reasonable estimates of the TCJA’s impact on state income tax. Our estimates are based on the best available information as of June 30, 2018 and our interpretation of the TCJA and related state tax implications, as currently enacted. Our estimates do not include any potential federal or state administrative and/or legislative adjustments to certain provisions of the TCJA and related state provisions. SAB 118 provides guidance for companies that have not completed their accounting for income tax effects of the TCJA, in the period of enactment, allowing for a measurement period of up to one year after the enactment date to finalize the recording of the related tax impacts. As of June 30, 2018, we have not completed our accounting for the tax effects of the enactment of the TJCA. We will continue to analyze the TCJA in order to finalize its enactment-date effects within the measurement period (Note 2). As of June 30, 2018, we have not adopted an accounting policy regarding the treatment of taxes due on future inclusion of non-U.S. income in U.S. taxable income under the Global Intangible Low-Taxed Income provisions. Therefore, no deferred tax related to these provisions has been recorded as of June 30, 2018. We will continue our analysis and will make an election within the measurement period as provided for under SAB 118.

Income Taxes

Our effective tax rate was 24% and 27% for the six months ended June 30, 2018 and 2017, respectively, and 24% and 25% for the three months ended June 30, 2018 and 2017, respectively. The effective tax rates for the six months and three months ended June 30, 2018 are lower than the effective tax rates for the comparable periods in 2017 primarily due to the enactment of the TCJA on December 22, 2017, which reduced the U.S. federal corporate income tax rate from 35% to 21%, effective January 1, 2018 (Note 2). That benefit is partially offset by additional U.S. federal and state income taxes on a portion of our non-U.S. income due to certain international tax provisions enacted as part of the TCJA, as well as tax benefits associated with a divestiture in the comparable periods in 2017.

We recorded our income tax provision based on the TCJA as enacted as of June 30, 2018. We have also made reasonable estimates of the TCJA’s impact on state income tax. Our estimates are based on the best available information as of June 30, 2018 and our interpretation of the TCJA and related state tax implications, as currently enacted. Our estimates do not include any potential federal or state administrative and/or legislative adjustments to certain provisions of the TCJA and related state provisions.

SAB 118 provides guidance for companies that have not completed their accounting for income tax effects of the TCJA, in the period of enactment, allowing for a measurement period of up to one year after the enactment date to finalize the recording of the related tax impacts. As of June 30, 2018, we have not completed our accounting for the tax effects of the enactment of the TJCA. We will continue to analyze the TCJA in order to finalize its enactment-date effects within the measurement period (Note 2).

As of June 30, 2018, we have not adopted an accounting policy regarding the treatment of taxes due on future inclusion of non-U.S. income in U.S. taxable income under the Global Intangible Low-Taxed Income provisions. Therefore, no deferred tax related to these provisions has been recorded as of June 30, 2018. We will continue our analysis and will make an election within the measurement period as provided for under SAB 118.