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Goodwill and Other Intangibles (Tables)
 12 Months Ended
May 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of goodwill
The following table summarizes the activity in Goodwill for the fiscal years ended May 31: 
 20212020
Gross beginning balance$164.5 $164.8 
Accumulated impairment(39.6)(39.6)
Beginning balance$124.9 $125.2 
Foreign currency translation1.4 (0.3)
Ending balance$126.3 $124.9 
Schedule of finite-lived intangible assets
The following table summarizes Other intangibles for the fiscal years ended May 31: 
 20212020
Other intangibles subject to amortization - beginning balance$10.5 $12.2 
Additions— 1.6 
Adjustments(0.5)— 
Amortization expense(2.2)(3.2)
Foreign currency translation0.6 (0.1)
Total other intangibles subject to amortization, net of accumulated amortization of $32.3 and $30.1, respectively
$8.4 $10.5 
Total other intangibles not subject to amortization2.1 2.1 
Total other intangibles$10.5 $12.6 
Schedule of future amortization of finite-lived intangible assets
The following table reflects the estimated amortization expense for intangibles for future fiscal years ending May 31: 
2022$2.0 
20231.9 
20241.5 
20251.2 
20260.4 
Thereafter1.4