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Inventory (Tables)
9 Months Ended
Feb. 29, 2020
Inventory  
Summary of inventories

    

February 29, 

    

May 31, 

2020

2019

Aircraft and engine parts, components and finished goods

$

553.0

$

467.9

Raw materials and parts

 

50.2

 

41.8

Work-in-process

18.4

14.0

$

621.6

$

523.7