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INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012	May 31, 2012
Income Taxes [Abstract]
Effective income tax rate	19.00%	20.70%	21.50%	23.90%
Net deferred tax assets	$ 1,400		$ 1,400		$ 1,400

- 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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