Taxes (Details) - Schedule for components for deferred income taxes (USD $) In Millions, unless otherwise specified	May 31, 2014	May 31, 2013
Deferred tax assets
Tax uniform capitalization	$ 26.6	$ 25.8
Inventory reserves	29.5	29.2
Allowance for doubtful accounts	4.9	5.4
Other reserves	26.4	26.3
Post-retirement, post-employment and pension obligations	15.5	12.6
Tax carryforwards	33.4	47.8
Lease accounting	(0.3)	11.7
Other - net	20.4	32.7
Gross deferred tax assets	156.4	191.5
Valuation allowance	(30.0)	(31.9)
Total deferred tax assets	126.4	159.6
Deferred tax liabilities
Prepaid expenses	(1.0)	(0.5)
Depreciation and amortization	(40.3)	(65.0)
Total deferred tax liability	(41.3)	(65.5)
Total net deferred tax assets	$ 85.1	$ 94.1