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STOCKHOLDERS' EQUITY (Tables)
9 Months Ended
Feb. 28, 2021
STOCKHOLDERS' EQUITY  
Schedule of changes in AOCI, net of tax

Foreign

Accumulated

Currency 

Pension and 

Other

Translation 

Post-Retirement

Comprehensive

    

Gains (Losses)

    

Benefits

    

Income (Loss)

Balance as of May 31, 2020

$

(36.3)

  

$

(4.2)

  

$

(40.5)

Other comprehensive income before reclassifications, net of tax

63.2

63.2

Amounts reclassified out of AOCI, net of tax

0.1

0.1

Net current-period other comprehensive income (loss)

 

63.2

  

 

0.1

 

63.3

Balance as of February 28, 2021

$

26.9

  

$

(4.1)

  

$

22.8