Income Taxes	6 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	12. Income Taxes Our effective tax rate for the three months ended March 31, 2019 and 2018 was 25.9% and 28.5%, respectively. For the three months ended March 31, 2019, our effective tax rate was favorably impacted by a lower federal statutory rate when compared the prior year as a result of the Tax Cut and Jobs Act (“U.S. Tax Reform”). For the fiscal year 2019, our U.S. federal statutory rate will be 21.0% compared to 24.5% for the prior fiscal year. Our effective tax rate for the six months ended March 31, 2019 and 2018 was 24.4% and 15.9%, respectively. For the six months ended March 31, 2018, our effective tax rate was favorably impacted by a net income tax benefit of $22.2 million related to U.S. Tax Reform when compared to the current period. This benefit was partially offset by the lower federal statutory rates recorded in the current period as compared to the prior period. In December 2017, the SEC issued Staff Accounting Bulletin No. 118 (“SAB 118”) which provided guidance allowing registrants to record provisional amounts, during a specified measurement period, when the necessary information is not available, prepared or analyzed in reasonable detail to account for the impact of U.S. Tax Reform. As of December 31, 2018, we have completed our analysis on our provisional calculations within the measurement period provided by SAB 118. As a result, during the six months ended March 31, 2019, we identified certain immaterial adjustments to our provisional calculations, including a benefit of $3.0 million related to the transition tax on unremitted earnings of our foreign operations. In addition, the U.S. Treasury Department has recently released proposed regulations covering the one-time transition tax on unrepatriated foreign earnings, which was enacted as part of the U.S. Tax Reform. Included within the proposed regulations, certain guidance is inconsistent with our interpretation of the enacted tax law. This proposed regulation is not authoritative and is subject to change in the regulatory review process. However, if the proposed regulation is included in the final regulations as drafted, we may be required to reverse $2.5 million of benefit in the quarter the regulations become final. Beginning in our first quarter of fiscal year 2019, we are subject to taxation on global intangible low-taxed income (“GILTI”) earned by certain foreign subsidiaries. We have made the policy election to record this tax as a period cost at the time it is incurred. The impact from GILTI was immaterial for the three months ended March 31, 2019 and is expected to be immaterial for the full fiscal year 2019.

Income Taxes

6 Months Ended

Mar. 31, 2019

12. Income Taxes

Our effective tax rate for the three months ended March 31, 2019 and 2018 was 25.9% and 28.5%, respectively. For the three months ended March 31, 2019, our effective tax rate was favorably impacted by a lower federal statutory rate when compared the prior year as a result of the Tax Cut and Jobs Act (“U.S. Tax Reform”). For the fiscal year 2019, our U.S. federal statutory rate will be 21.0% compared to 24.5% for the prior fiscal year.

Our effective tax rate for the six months ended March 31, 2019 and 2018 was 24.4% and 15.9%, respectively. For the six months ended March 31, 2018, our effective tax rate was favorably impacted by a net income tax benefit of $22.2 million related to U.S. Tax Reform when compared to the current period. This benefit was partially offset by the lower federal statutory rates recorded in the current period as compared to the prior period.

In December 2017, the SEC issued Staff Accounting Bulletin No. 118 (“SAB 118”) which provided guidance allowing registrants to record provisional amounts, during a specified measurement period, when the necessary information is not available, prepared or analyzed in reasonable detail to account for the impact of U.S. Tax Reform. As of December 31, 2018, we have completed our analysis on our provisional calculations within the measurement period provided by SAB 118. As a result, during the six months ended March 31, 2019, we identified certain immaterial adjustments to our provisional calculations, including a benefit of $3.0 million related to the transition tax on unremitted earnings of our foreign operations.

In addition, the U.S. Treasury Department has recently released proposed regulations covering the one-time transition tax on unrepatriated foreign earnings, which was enacted as part of the U.S. Tax Reform. Included within the proposed regulations, certain guidance is inconsistent with our interpretation of the enacted tax law. This proposed regulation is not authoritative and is subject to change in the regulatory review process. However, if the proposed regulation is included in the final regulations as drafted, we may be required to reverse $2.5 million of benefit in the quarter the regulations become final.

Beginning in our first quarter of fiscal year 2019, we are subject to taxation on global intangible low-taxed income (“GILTI”) earned by certain foreign subsidiaries. We have made the policy election to record this tax as a period cost at the time it is incurred. The impact from GILTI was immaterial for the three months ended March 31, 2019 and is expected to be immaterial for the full fiscal year 2019.