INCOME TAX	6 Months Ended
Nov. 30, 2016
Income Tax Disclosure [Abstract]
INCOME TAX	INCOME TAX Our effective income tax rates were 2.9% and 24.7% for the three months ended November 30, 2016 and November 30, 2015, respectively. Our effective income tax rates were 16.9% and 25.4% for the six months ended November 30, 2016 and November 30, 2015, respectively. Our effective income tax rates differ from the U.S. statutory rate primarily due to income generated in international jurisdictions with lower tax rates. We also changed our estimate of the mix of earnings by jurisdiction in determining our annual estimated effective tax rate and our estimate of certain U.S. inclusion items during the three months ended November 30, 2016. We conduct business globally and file income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business, we are subject to examination by taxing authorities around the world, including, without limitation, the United States and the United Kingdom. We are no longer subject to state income tax examinations for years ended on or before May 31, 2008, U.S. federal income tax examinations for fiscal years prior to 2013 and U.K. federal income tax examinations for years ended on or before May 31, 2013.

INCOME TAX

6 Months Ended

Nov. 30, 2016

Our effective income tax rates were 2.9% and 24.7% for the three months ended November 30, 2016 and November 30, 2015, respectively. Our effective income tax rates were 16.9% and 25.4% for the six months ended November 30, 2016 and November 30, 2015, respectively. Our effective income tax rates differ from the U.S. statutory rate primarily due to income generated in international jurisdictions with lower tax rates. We also changed our estimate of the mix of earnings by jurisdiction in determining our annual estimated effective tax rate and our estimate of certain U.S. inclusion items during the three months ended November 30, 2016.

We conduct business globally and file income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business, we are subject to examination by taxing authorities around the world, including, without limitation, the United States and the United Kingdom. We are no longer subject to state income tax examinations for years ended on or before May 31, 2008, U.S. federal income tax examinations for fiscal years prior to 2013 and U.K. federal income tax examinations for years ended on or before May 31, 2013.