Commitments and Contingencies (Details 1) (USD $) In Millions, unless otherwise specified	May 31, 2012
Summary of future minimum lease payments under various non-cancelable operating leases
Operating Leases Future Minimum Payments, Due 2013	$ 38.9
Operating Leases Future Minimum Payments, Due 2014	32.3
Operating Leases Future Minimum Payments, Due 2015	27.3
Operating Leases Future Minimum Payments, Due 2016	20.0
Operating Leases Future Minimum Payments, Due 2017	15.0
Operating Leases Future Minimum Payments, Due Thereafter	$ 21.4

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fifth year of the balance sheet date relating to leases defined as operating.

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- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fourth year of the balance sheet date relating to leases defined as operating.

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- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the third year of the balance sheet date relating to leases defined as operating.

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- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the second year of the balance sheet date relating to leases defined as operating.

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- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due after the fifth year from the balance sheet date on leases defined as operating.

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