PENSION AND POSTRETIREMENT HEALTH CARE BENEFITS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
Nov. 30, 2011	May 31, 2011
Postretirement Benefits, U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to retirement plans	$ 7.5	$ 5.2
Total expected contribution to retirement plans	12.7
Postretirement Benefits, Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to retirement plans		$ 8.0

The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan in the current remaining fiscal period. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant