Basis of Presentation (Policies)	3 Months Ended
Aug. 31, 2012
Basis of Presentation [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In June 2011, the FASB issued guidance on presentation of comprehensive income. The new guidance eliminates the current option to report other comprehensive income (OCI) and its components in the statement of changes in equity. Instead, an entity will be required to present components of comprehensive income in either (1) a continuous statement of net income or (2) two separate but consecutive statements. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. Early adoption of the new guidance is permitted and full retrospective application is required. We adopted this guidance effective June 1, 2012 and elected to disclose comprehensive income in a single continuous statement. Adoption of this guidance had no material impact on our consolidated financial position, results of operations or cash flows. In September 2011, the FASB issued guidance to simplify how an entity tests goodwill for impairment. The amendments in the update provide for an option to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. An entity that adopts this option will no longer be required to calculate the fair value of a reporting unit (Step 1) unless the entity determines, based on a qualitative assessment, that it is more likely than not that the fair value of the reporting unit is less than its carrying amount. We adopted this guidance effective June 1, 2012 with no material impact on our consolidated financial position, results of operations or cash flows. In July 2012, the FASB issued guidance to simplify how an entity tests indefinite-lived intangible assets other than goodwill for impairment and permitting an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of the indefinite-lived intangible asset is less than its carrying amount as a basis for determining whether it is necessary to perform a quantitative impairment test. This ASU is effective for annual and interim impairment tests performed for fiscal years beginning after December 15, 2011 (early adoption is permitted). The guidance for the qualitative process became effective our first quarter of fiscal 2013.

Basis of Presentation (Policies)

3 Months Ended

Aug. 31, 2012

Recent Accounting Pronouncements

In June 2011, the FASB issued guidance on presentation of comprehensive income. The new guidance eliminates the current option to report other comprehensive income (OCI) and its components in the statement of changes in equity. Instead, an entity will be required to present components of comprehensive income in either (1) a continuous statement of net income or (2) two separate but consecutive statements. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. Early adoption of the new guidance is permitted and full retrospective application is required. We adopted this guidance effective June 1, 2012 and elected to disclose comprehensive income in a single continuous statement. Adoption of this guidance had no material impact on our consolidated financial position, results of operations or cash flows.

In September 2011, the FASB issued guidance to simplify how an entity tests goodwill for impairment. The amendments in the update provide for an option to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. An entity that adopts this option will no longer be required to calculate the fair value of a reporting unit (Step 1) unless the entity determines, based on a qualitative assessment, that it is more likely than not that the fair value of the reporting unit is less than its carrying amount. We adopted this guidance effective June 1, 2012 with no material impact on our consolidated financial position, results of operations or cash flows.

In July 2012, the FASB issued guidance to simplify how an entity tests indefinite-lived intangible assets other than goodwill for impairment and permitting an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of the indefinite-lived intangible asset is less than its carrying amount as a basis for determining whether it is necessary to perform a quantitative impairment test. This ASU is effective for annual and interim impairment tests performed for fiscal years beginning after December 15, 2011 (early adoption is permitted). The guidance for the qualitative process became effective our first quarter of fiscal 2013.