Income Taxes	3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Grace’s effective tax rates for the three months ended March 31, 2019 and 2018, were 30.7% and 36.4%, respectively. For both periods, Grace’s effective tax rate was higher than the U.S. federal statutory rate primarily due to the effect of taxes in foreign jurisdictions. Additionally, the 2018 provision for income taxes includes a Global Intangible Low-Taxed Income (“GILTI”) charge on income earned by certain foreign subsidiaries of $5.9 million. The effect of the GILTI charge on the 2019 provision for income taxes is immaterial because Grace forecasts U.S. federal taxable income and expects to significantly utilize its remaining U.S. net operating losses in 2019. This would allow Grace to benefit from the GILTI deduction in 2019, while it could not in 2018 because it had insufficient U.S. federal taxable income. As of March 31, 2019, Grace has $301.2 million in federal tax credit carryforwards before unrecognized tax benefits. Based on the status of examinations in our significant taxing jurisdictions, Grace expects that the amount of the liability for unrecognized tax benefits could decrease by approximately $3 million to $5 million in the 2019 second quarter.

Income Taxes

3 Months Ended

Mar. 31, 2019

Grace’s effective tax rates for the three months ended March 31, 2019 and 2018, were 30.7% and 36.4%, respectively. For both periods, Grace’s effective tax rate was higher than the U.S. federal statutory rate primarily due to the effect of taxes in foreign jurisdictions. Additionally, the 2018 provision for income taxes includes a Global Intangible Low-Taxed Income (“GILTI”) charge on income earned by certain foreign subsidiaries of $5.9 million. The effect of the GILTI charge on the 2019 provision for income taxes is immaterial because Grace forecasts U.S. federal taxable income and expects to significantly utilize its remaining U.S. net operating losses in 2019. This would allow Grace to benefit from the GILTI deduction in 2019, while it could not in 2018 because it had insufficient U.S. federal taxable income.

As of March 31, 2019, Grace has $301.2 million in federal tax credit carryforwards before unrecognized tax benefits.

Based on the status of examinations in our significant taxing jurisdictions, Grace expects that the amount of the liability for unrecognized tax benefits could decrease by approximately $3 million to $5 million in the 2019 second quarter.