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Accounts Receivable (Tables)
6 Months Ended
Nov. 30, 2021
Accounts Receivable  
Schedule of accounts receivable

November 30, 

May 31, 

    

2021

    

2021

U.S. Government contracts:

 

  

 

  

Trade receivables

$

22.8

$

24.1

Unbilled receivables

 

21.1

 

25.2

 

43.9

 

49.3

All other customers:

 

 

  

Trade receivables

 

131.6

 

104.9

Unbilled receivables

 

16.6

 

12.5

 

148.2

 

117.4

$

192.1

$

166.7