Income Taxes	3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We consider new evidence (both positive and negative) at each reporting date that could affect our view of the future realization of deferred tax assets. Based upon the evaluation of all available evidence, and considering the projected U.S. pre-tax losses for 2019, we maintain a valuation allowance for our U.S. operations as of March 31, 2019. We maintained other valuation allowances for certain non-U.S. jurisdictions with cumulative losses. The effective income tax rates for the three months ended March 31, 2019 and 2018 were (18%) and (3%), respectively, and were determined using an estimated annual effective tax rate after considering any discrete items for such periods. Due to the aforementioned valuation allowance against our U.S. deferred tax assets, the effective tax rates for the three months ended March 31, 2019 and 2018 do not include the benefits of the U.S. tax losses, and we recorded an overall tax expense in both periods due to foreign pre-tax earnings. The change in the effective tax rates relates primarily to the overall mix of income in our foreign jurisdictions.

Income Taxes

3 Months Ended

Mar. 31, 2019

We consider new evidence (both positive and negative) at each reporting date that could affect our view of the future realization of deferred tax assets. Based upon the evaluation of all available evidence, and considering the projected U.S. pre-tax losses for 2019, we maintain a valuation allowance for our U.S. operations as of March 31, 2019. We maintained other valuation allowances for certain non-U.S. jurisdictions with cumulative losses.

The effective income tax rates for the three months ended March 31, 2019 and 2018 were (18%) and (3%), respectively, and were determined using an estimated annual effective tax rate after considering any discrete items for such periods. Due to the aforementioned valuation allowance against our U.S. deferred tax assets, the effective tax rates for the three months ended March 31, 2019 and 2018 do not include the benefits of the U.S. tax losses, and we recorded an overall tax expense in both periods due to foreign pre-tax earnings. The change in the effective tax rates relates primarily to the overall mix of income in our foreign jurisdictions.