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INCOME TAXES Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 31, 2011	Aug. 31, 2010	May 31, 2011
Income Taxes (Narrative) [Abstract]
Effective income tax rate	25.60%	24.70%
Net deferred tax assets	$ 2,300		$ 2,100

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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