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Property, Plant and Equipment (Tables)
12 Months Ended
May 31, 2017
Property, Plant and Equipment [Abstract]  
Schedule Property, Plant and Equipment
The following table summarizes the major classes of assets at cost and accumulated depreciation for the fiscal years ended May 31:
 
2017
 
2016
Land
$
77.5

   
$
77.4

Buildings
239.7

   
240.4

Capitalized software
202.0

   
196.0

Furniture, fixtures and equipment
224.7

   
221.5

Building and leasehold improvements
176.9

   
141.7

Total at cost
920.8

   
877.0

Less: Accumulated depreciation and amortization
(445.5
)
 
(439.4
)
Property, plant and equipment, net
$
475.3

   
$
437.6