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Inventories (Details) - USD ($)
$ in Millions
Nov. 30, 2023
May 31, 2023
Inventories    
Aircraft and engine parts, components and finished goods $ 563.8 $ 488.9
Raw materials and parts 52.3 59.6
Work-in-process 29.8 25.6
Total inventories $ 645.9 $ 574.1