Income Taxes	6 Months Ended
Nov. 30, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes. The Company applies guidance issued by the Financial Accounting Standards Board for uncertainty in income taxes. The Company records the liability for unrecognized tax positions as a long-term liability. The Company conducts business globally and, as a result, certain of its subsidiaries file income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. In the normal course of business, the Company is subject to examinations by taxing authorities throughout the world, including major jurisdictions such as Australia, Canada, China, France, Germany, Japan, Luxembourg, the Netherlands, Spain, the United Kingdom and the United States. In addition, certain state and foreign tax returns are under examination by various regulatory authorities. The Company is no longer subject to U.S. federal income tax examinations for the fiscal years prior to and including the year ended May 31, 2010. The Company regularly reviews issues that are raised from ongoing examinations and open tax years to evaluate the adequacy of its liabilities. As the various taxing authorities continue with their audit/examination programs, the Company will adjust its reserves accordingly to reflect these settlements. As of November 30, 2014, the Company does not anticipate a significant change in its worldwide gross liabilities for unrecognized tax benefits within the succeeding twelve months. The Company’s effective income tax rate was 3.6% and 2.7% for the three and six months ended November 30, 2014, compared to (16.7)% and (233.3)% for the three and six months ended November 30, 2013. Primary factors in determining the effective tax rates include the mix of various jurisdictions in which profits are projected to be earned and taxed, as well as assertions regarding the expected repatriation of earnings of the Company’s foreign operations. Fluctuations in effective tax rates between comparable periods also reflect the discrete tax benefit or expense of items in continuing operations that represent tax effects not attributable to current-year ordinary income. Discrete items, consisting primarily of changes in deferred taxes due to state and international reorganizations, release of valuation allowance on state net operating loss carryforwards and the prospective reduction of the United Kingdom statutory corporate tax rate enacted in July 2013, decreased the quarterly income tax provision by ($26.1) million, or (242.1)%, in the six months ended November 30, 2013.

Income Taxes.

The Company applies guidance issued by the Financial Accounting Standards Board for uncertainty in income taxes. The Company records the liability for unrecognized tax positions as a long-term liability.

The Company conducts business globally and, as a result, certain of its subsidiaries file income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. In the normal course of business, the Company is subject to examinations by taxing authorities throughout the world, including major jurisdictions such as Australia, Canada, China, France, Germany, Japan, Luxembourg, the Netherlands, Spain, the United Kingdom and the United States. In addition, certain state and foreign tax returns are under examination by various regulatory authorities. The Company is no longer subject to U.S. federal income tax examinations for the fiscal years prior to and including the year ended May 31, 2010.

The Company regularly reviews issues that are raised from ongoing examinations and open tax years to evaluate the adequacy of its liabilities. As the various taxing authorities continue with their audit/examination programs, the Company will adjust its reserves accordingly to reflect these settlements. As of November 30, 2014, the Company does not anticipate a significant change in its worldwide gross liabilities for unrecognized tax benefits within the succeeding twelve months.

The Company’s effective income tax rate was 3.6% and 2.7% for the three and six months ended November 30, 2014, compared to (16.7)% and (233.3)% for the three and six months ended November 30, 2013. Primary factors in determining the effective tax rates include the mix of various jurisdictions in which profits are projected to be earned and taxed, as well as assertions regarding the expected repatriation of earnings of the Company’s foreign operations. Fluctuations in effective tax rates between comparable periods also reflect the discrete tax benefit or expense of items in continuing operations that represent tax effects not attributable to current-year ordinary income. Discrete items, consisting primarily of changes in deferred taxes due to state and international reorganizations, release of valuation allowance on state net operating loss carryforwards and the prospective reduction of the United Kingdom statutory corporate tax rate enacted in July 2013, decreased the quarterly income tax provision by ($26.1) million, or (242.1)%, in the six months ended November 30, 2013.