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Inventories (Details) - USD ($)
$ in Millions
Nov. 30, 2022
May 31, 2022
Inventories    
Aircraft and engine parts, components and finished goods $ 520.4 $ 465.9
Raw materials and parts 56.0 62.2
Work-in-process 18.6 22.4
Total inventories $ 595.0 $ 550.5