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Accounts Receivable (Tables)
9 Months Ended
Feb. 28, 2026
Accounts Receivable  
Schedule of accounts receivable

February 28, 

May 31, 

  ​ ​ ​

2026

  ​ ​ ​

2025

U.S. Government contracts:

 

  ​

 

  ​

Trade receivables

$

42.7

$

26.6

Unbilled receivables

 

6.0

 

13.4

 

48.7

 

40.0

All other customers:

 

 

Trade receivables

 

346.5

 

283.4

Unbilled receivables

 

31.0

 

31.4

 

377.5

 

314.8

$

426.2

$

354.8