Income Taxes	3 Months Ended
Aug. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	(5) Income Taxes Our effective tax rate was 24.2% for the first quarter of 2019, compared with 39.3% for the first quarter of 2018. The 2019 tax rate was favorably impacted by the TCJA, which resulted in an approximate $135 million benefit primarily from the lower statutory tax rate on first quarter 2019 earnings. The 2018 tax rate was negatively impacted by costs incurred in connection with the integration of the foreign operations of FedEx Express and TNT Express B.V. (“TNT Express”) and the effects of the NotPetya cyberattack on lower taxed foreign earnings, which were partially offset by tax benefits from share-based payments. On August 1, 2018, the U.S. Treasury Department released proposed regulations covering the one-time transition tax on unrepatriated foreign earnings, which was enacted as part of the TCJA. Certain guidance included in these proposed regulations is inconsistent with our interpretation that led to the recognition of a $225 million ($0.94 per diluted share) benefit in 2018 (the “2018 Benefit”). This proposed guidance is not authoritative and is subject to change in the regulatory review process. However, if the proposed guidance is included in the final regulations as drafted, we may be required to reverse the 2018 Benefit in the quarter the regulations become final. We are still completing our accounting for the income tax effects of the TCJA. As of August 31, 2018, there were no changes to the provisional amounts recorded at May 31, 2018.

(5) Income Taxes

Our effective tax rate was 24.2% for the first quarter of 2019, compared with 39.3% for the first quarter of 2018. The 2019 tax rate was favorably impacted by the TCJA, which resulted in an approximate $135 million benefit primarily from the lower statutory tax rate on first quarter 2019 earnings. The 2018 tax rate was negatively impacted by costs incurred in connection with the integration of the foreign operations of FedEx Express and TNT Express B.V. (“TNT Express”) and the effects of the NotPetya cyberattack on lower taxed foreign earnings, which were partially offset by tax benefits from share-based payments.

On August 1, 2018, the U.S. Treasury Department released proposed regulations covering the one-time transition tax on unrepatriated foreign earnings, which was enacted as part of the TCJA. Certain guidance included in these proposed regulations is inconsistent with our interpretation that led to the recognition of a $225 million ($0.94 per diluted share) benefit in 2018 (the “2018 Benefit”). This proposed guidance is not authoritative and is subject to change in the regulatory review process. However, if the proposed guidance is included in the final regulations as drafted, we may be required to reverse the 2018 Benefit in the quarter the regulations become final.

We are still completing our accounting for the income tax effects of the TCJA. As of August 31, 2018, there were no changes to the provisional amounts recorded at May 31, 2018.