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Commitments and Contingencies (Tables)
3 Months Ended
Aug. 31, 2013
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
These reserves are adjusted once an issue is identified and the actual cost of correction becomes known or can be estimated.
(In millions)
Three Months Ended
 
August 31, 2013
 
September 1, 2012
Accrual Balance — beginning
$
24.8

 
$
22.2

Accrual for warranty matters
4.9

 
6.8

Settlements and adjustments
(5.1
)
 
(5.4
)
Accrual Balance — ending
$
24.6

 
$
23.6