XML 48 R33.htm IDEA: XBRL DOCUMENT v3.7.0.1
Inventory (Details) - USD ($)
$ in Millions
Aug. 31, 2017
May 31, 2017
Inventory    
Raw materials and parts $ 45.9 $ 45.0
Work-in-process 29.3 25.8
Aircraft and engine parts, components and finished goods 379.8 393.1
Aircraft held for sale and related support parts 18.0 19.2
Total inventories $ 473.0 $ 483.1