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Investments (Tables)
6 Months Ended
Nov. 30, 2019
Equity Method And Cost Method Investments [Abstract]  
Investments The following table summarizes the Company’s investments as of the dates indicated:
 
November 30, 2019
 
May 31, 2019
 
November 30, 2018
 
Segment
Equity method investments
$26.0
 
$23.4
 
$34.3
 
International
Other equity investments
6.0
 
6.0
 
0.0
 
Children's Book Publishing & Distribution
Total Investments
$32.0
 
$29.4
 
$34.3