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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
May 31, 2014
Summary of Significant Accounting Policies  
Schedule of goodwill by reportable segment
 
   May 31,  
 
   2014   2013  

Aviation Services

   $ 107.4   $ 105.4  

Technology Products

     154.3     150.2  
           
​ ​ ​ ​ ​ ​ ​ ​

 

   $ 261.7   $ 255.6  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           
Schedule of intangible assets, other than goodwill
  May 31,  
 
   2014   2013  

Amortizable intangible assets:

              

Customer relationships

   $ 124.0   $ 108.0  

Developed technology

     32.8     31.0  

Lease agreements

     21.5     21.5  

FAA certificates

     5.0     5.0  
           
​ ​ ​ ​ ​ ​ ​ ​

 

     183.3     165.5  

Accumulated amortization

     (36.2 )   (25.1 )
           
​ ​ ​ ​ ​ ​ ​ ​

 

     147.1     140.4  

Unamortized intangible assets:

              

Trademarks

     18.3     17.4  
           
​ ​ ​ ​ ​ ​ ​ ​

 

   $ 165.4   $ 157.8  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           
Summary of inventories

 

 

 
   May 31,  
 
   2014   2013  

Raw materials and parts

   $ 114.1   $ 83.9  

Work-in-process

     57.5     84.0  

Aircraft and engine parts, components and finished goods

     323.7     285.8  
           
​ ​ ​ ​ ​ ​ ​ ​

 

   $ 495.3   $ 453.7  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           
Summary of equipment on or available for long-term lease
  May 31,  
 
   2014   2013  

Rotable parts

   $ 73.1   $ 41.7  

Aircraft

     25.3     23.0  
           
​ ​ ​ ​ ​ ​ ​ ​

 

   $ 98.4   $ 64.7  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           
Schedule of supplemental information on cash flow

  For the Year Ended
May 31,		  
 
   2014   2013   2012  

Interest paid

   $ 33.8   $ 28.3   $ 16.6  

Income taxes paid

     17.3     24.1     11.4  

Income tax refunds and interest received

     7.5     23.2     7.2