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Inventories (Tables)
6 Months Ended
Nov. 30, 2021
Inventories  
Summary of inventories

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November 30, 

    

May 31, 

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2021

    

2021

Aircraft and engine parts, components and finished goods

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$

453.1

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$

468.4

Raw materials and parts

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58.7

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53.0

Work-in-process

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19.9

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19.2

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$

531.7

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$

540.6