Income Taxes	9 Months Ended
Feb. 28, 2017
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 8 — INCOME TAXES The effective income tax rate was 25.4% for the three months ended February 28, 2017 compared to an effective income tax rate of 11.9% for the three months ended February 29, 2016. The effective income tax rate was 4.8% for the nine months ended February 28, 2017 compared to an effective income tax rate of 28.3% for the nine months ended February 29, 2016. The effective tax rate for the three and nine months ended February 28, 2017 and February 29, 2016 reflect variances from the 35% federal statutory rate due to the lower effective tax rate of certain of our foreign subsidiaries, the benefit of the domestic manufacturing deduction and the unfavorable impact of state and local taxes. Additionally, the effective tax rate for the three and nine months ended February 28, 2017 was favorably impacted as a result of our current year early adoption of ASU 2016-09, “Improvements to Employee Share-Based Payment Accounting.” In conjunction with our adoption of the standard, we recorded discrete benefits of $0.2 million and $11.5 million during the three and nine months ended February 28, 2017, respectively, for excess tax benefits related to equity compensation. Please see Note 2, “New Accounting Pronouncements,” for additional discussion regarding our adoption of the standard. The effective tax rate for the three and nine month periods ended February 29, 2016 was favorably impacted by $3.9 million of discrete tax benefits recorded in the fiscal 2016 third quarter. The discrete benefits were primarily related to the reversal of tax contingency reserves and benefits related to the distribution of foreign earnings that were previously subjected to U.S. tax. At May 31, 2016, we determined that it was possible that we would repatriate approximately $377.3 million of undistributed foreign earnings in the foreseeable future. Accordingly, as of May 31, 2016, we recorded a deferred income tax liability of $98.5 million, which represented our estimate of the net U.S income and foreign withholding tax associated with the $377.3 million of unremitted foreign earnings. As of February 28, 2017, the amount of undistributed earnings that may be repatriated and the corresponding deferred tax liability has been adjusted to $372.6 million and $96.3 million, respectively. The adjustments are primarily due to foreign currency translation, which was recorded as a component of other comprehensive income. We have not provided for U.S. income and foreign withholding taxes on the remaining foreign subsidiaries’ undistributed earnings because such earnings have been retained and reinvested by the subsidiaries as of February 28, 2017. Accordingly, no provision has been made for U.S. income taxes or foreign withholding taxes, which may become payable if the remaining undistributed earnings of those foreign subsidiaries were paid to us as dividends.

NOTE 8 — INCOME TAXES

The effective income tax rate was 25.4% for the three months ended February 28, 2017 compared to an effective income tax rate of 11.9% for the three months ended February 29, 2016. The effective income tax rate was 4.8% for the nine months ended February 28, 2017 compared to an effective income tax rate of 28.3% for the nine months ended February 29, 2016.

The effective tax rate for the three and nine months ended February 28, 2017 and February 29, 2016 reflect variances from the 35% federal statutory rate due to the lower effective tax rate of certain of our foreign subsidiaries, the benefit of the domestic manufacturing deduction and the unfavorable impact of state and local taxes.

Additionally, the effective tax rate for the three and nine months ended February 28, 2017 was favorably impacted as a result of our current year early adoption of ASU 2016-09, “Improvements to Employee Share-Based Payment Accounting.” In conjunction with our adoption of the standard, we recorded discrete benefits of $0.2 million and $11.5 million during the three and nine months ended February 28, 2017, respectively, for excess tax benefits related to equity compensation. Please see Note 2, “New Accounting Pronouncements,” for additional discussion regarding our adoption of the standard.

The effective tax rate for the three and nine month periods ended February 29, 2016 was favorably impacted by $3.9 million of discrete tax benefits recorded in the fiscal 2016 third quarter. The discrete benefits were primarily related to the reversal of tax contingency reserves and benefits related to the distribution of foreign earnings that were previously subjected to U.S. tax.

At May 31, 2016, we determined that it was possible that we would repatriate approximately $377.3 million of undistributed foreign earnings in the foreseeable future. Accordingly, as of May 31, 2016, we recorded a deferred income tax liability of $98.5 million, which represented our estimate of the net U.S income and foreign withholding tax associated with the $377.3 million of unremitted foreign earnings. As of February 28, 2017, the amount of undistributed earnings that may be repatriated and the corresponding deferred tax liability has been adjusted to $372.6 million and $96.3 million, respectively. The adjustments are primarily due to foreign currency translation, which was recorded as a component of other comprehensive income. We have not provided for U.S. income and foreign withholding taxes on the remaining foreign subsidiaries’ undistributed earnings because such earnings have been retained and reinvested by the subsidiaries as of February 28, 2017. Accordingly, no provision has been made for U.S. income taxes or foreign withholding taxes, which may become payable if the remaining undistributed earnings of those foreign subsidiaries were paid to us as dividends.