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Equipment on Long-Term Lease (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2005	May 31, 2013	May 31, 2012
Equipment on Long-Term Lease
Net book value		$ 361.7	$ 382.9
Long-term lease
Equipment on Long-Term Lease
Term of agreements	10 years
Purchase of equipment	58.4
Net book value		$ 28.1	$ 30.9

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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