Basis of Presentation (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Aug. 31, 2012	Aug. 31, 2011	May 31, 2012
Selling, General and Administrative Expense	$ 173.9	$ 175.7
Restricted Cash	0.8	0.2	1.0
Pension And Post Retirement Benefit Plans [Member]
Selling, General and Administrative Expense	$ 1.1	$ 1.3

- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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