Income Taxes	9 Months Ended
Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We recorded income tax expense at an effective rate of 23.0% for the three months ended September 30, 2018, as compared to an effective rate of 36.5% for the three months ended September 30, 2017. The 2018 rate was favorably impacted by the enactment of the Tax Act in December 2017. The 23.0% effective tax rate in the quarter was higher than the United States Federal statutory rate of 21% due primarily to the French business tax. We recorded income tax expense at an effective rate of 26.3% for the nine months ended September 30, 2018 as compared to an effective rate of 35.9% for the nine months ended September 30, 2017. The 2018 rate was favorably impacted by the enactment of the Tax Act in December 2017. The 26.3% effective tax rate for the nine months ended September 30, 2018 was higher than the United States Federal statutory rate of 21% primarily due to the French business tax. We currently expect a 2018 annual effective tax rate of approximately 26% to 27%. In December 2017, the Tax Act made broad changes to the United States tax code, including a reduction of the United States federal corporate income tax rate from 35% to 21% effective January 1, 2018 and a transition to a territorial tax regime resulting in a one-time transition tax on the mandatory deemed repatriation of unremitted post-1986 non-United States earnings. The Tax Act also established new provisions related to global intangible low-taxed income ("GILTI"), foreign derived intangible income and a base erosion and anti-abuse tax. The computation of these new provisions is highly complex, and our estimates could significantly change as a result of new rules or guidance from the various standard-setting bodies. Our accounting for certain elements of the Tax Act was incomplete as of December 31, 2017 and remains incomplete as of September 30, 2018. However, we were able to make reasonable estimates of the impact of the Tax Act as of December 31, 2017 and, therefore, recorded provisional estimates for these items, including the one-time transition tax and the revaluation of our deferred tax assets and liabilities. In accordance with accounting guidance, we are allowed to make an accounting policy choice to either treat taxes due on future inclusions in United States taxable income related to GILTI as a current-period expense when incurred or factor such amounts into our measurement of deferred taxes. We have made a policy decision to treat taxes related to GILTI as a current-period expense when incurred and have included estimates of this provision as current-period expenses for the nine months ended September 30, 2018. During the first nine months of 2018, the Internal Revenue Service issued new guidance affecting the computation of our 2017 transition tax liability. As a result of the new guidance and additional analysis of the impacts of the Tax Act, during the first nine months of 2018 we revised our provisional estimates of the impact of enactment of the Tax Act in December 2017 and recorded tax expense of $0.2. The ultimate impact of the Tax Act may differ from our estimates as of September 30, 2018, possibly materially, due to changes in interpretations and assumptions we have made, future guidance that may be issued and actions we may take as a result of the Tax Act. As of September 30, 2018, we had gross unrecognized tax benefits related to various tax jurisdictions, including interest and penalties, of $78.9 that would favorably impact the effective tax rate if recognized. As of December 31, 2017, we had gross unrecognized tax benefits related to various tax jurisdictions, including interest and penalties, of $66.5. We believe it is reasonably possible over the next twelve months that our unrecognized tax benefits could decrease by up to $42.4 due to pending resolution of non-United States litigation. All tax contingencies are deemed appropriately reserved. We conduct business globally in various countries and territories. We are routinely audited by the tax authorities of the various tax jurisdictions in which we operate. Generally, the tax years that could be subject to examination are 2010 through 2017 for our major operations in France, Germany, Japan, the United Kingdom and the United States. As of September 30, 2018, we are subject to tax audits in Austria, Canada, Denmark, France, Germany and the United States. We believe that the resolution of these audits will not have a material impact on earnings.

Income Taxes

We recorded income tax expense at an effective rate of 23.0% for the three months ended September 30, 2018, as compared to an effective rate of 36.5% for the three months ended September 30, 2017. The 2018 rate was favorably impacted by the enactment of the Tax Act in December 2017. The 23.0% effective tax rate in the quarter was higher than the United States Federal statutory rate of 21% due primarily to the French business tax.

We recorded income tax expense at an effective rate of 26.3% for the nine months ended September 30, 2018 as compared to an effective rate of 35.9% for the nine months ended September 30, 2017. The 2018 rate was favorably impacted by the enactment of the Tax Act in December 2017. The 26.3% effective tax rate for the nine months ended September 30, 2018 was higher than the United States Federal statutory rate of 21% primarily due to the French business tax. We currently expect a 2018 annual effective tax rate of approximately 26% to 27%.

In December 2017, the Tax Act made broad changes to the United States tax code, including a reduction of the United States federal corporate income tax rate from 35% to 21% effective January 1, 2018 and a transition to a territorial tax regime resulting in a one-time transition tax on the mandatory deemed repatriation of unremitted post-1986 non-United States earnings. The Tax Act also established new provisions related to global intangible low-taxed income ("GILTI"), foreign derived intangible income and a base erosion and anti-abuse tax. The computation of these new provisions is highly complex, and our estimates could significantly change as a result of new rules or guidance from the various standard-setting bodies.

Our accounting for certain elements of the Tax Act was incomplete as of December 31, 2017 and remains incomplete as of September 30, 2018. However, we were able to make reasonable estimates of the impact of the Tax Act as of December 31, 2017 and, therefore, recorded provisional estimates for these items, including the one-time transition tax and the revaluation of our deferred tax assets and liabilities. In accordance with accounting guidance, we are allowed to make an accounting policy choice to either treat taxes due on future inclusions in United States taxable income related to GILTI as a current-period expense when incurred or factor such amounts into our measurement of deferred taxes. We have made a policy decision to treat taxes related to GILTI as a current-period expense when incurred and have included estimates of this provision as current-period expenses for the nine months ended September 30, 2018.

During the first nine months of 2018, the Internal Revenue Service issued new guidance affecting the computation of our 2017 transition tax liability. As a result of the new guidance and additional analysis of the impacts of the Tax Act, during the first nine months of 2018 we revised our provisional estimates of the impact of enactment of the Tax Act in December 2017 and recorded tax expense of $0.2. The ultimate impact of the Tax Act may differ from our estimates as of September 30, 2018, possibly materially, due to changes in interpretations and assumptions we have made, future guidance that may be issued and actions we may take as a result of the Tax Act.

As of September 30, 2018, we had gross unrecognized tax benefits related to various tax jurisdictions, including interest and penalties, of $78.9 that would favorably impact the effective tax rate if recognized. As of December 31, 2017, we had gross unrecognized tax benefits related to various tax jurisdictions, including interest and penalties, of $66.5. We believe it is reasonably possible over the next twelve months that our unrecognized tax benefits could decrease by up to $42.4 due to pending resolution of non-United States litigation. All tax contingencies are deemed appropriately reserved.

We conduct business globally in various countries and territories. We are routinely audited by the tax authorities of the various tax jurisdictions in which we operate. Generally, the tax years that could be subject to examination are 2010 through 2017 for our major operations in France, Germany, Japan, the United Kingdom and the United States. As of September 30, 2018, we are subject to tax audits in Austria, Canada, Denmark, France, Germany and the United States. We believe that the resolution of these audits will not have a material impact on earnings.