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Goodwill and Other Intangibles (Tables)
 12 Months Ended
May 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of goodwill
The following table summarizes the activity in Goodwill for the fiscal years ended May 31: 
 
2019
 
2018
Gross beginning balance
$
158.8

 
$
158.5

Accumulated impairment
(39.6
)
 
(39.6
)
Beginning balance
$
119.2

 
$
118.9

Additions
6.3

 
—

Foreign currency translation
(0.3
)
 
0.2

Other
—

 
0.1

Ending balance
$
125.2

 
$
119.2
Schedule of finite-lived intangible assets
The following table summarizes Other intangibles for the fiscal years ended May 31: 
 
2019
 
2018
Other intangibles subject to amortization - beginning balance
$
10.1

 
$
9.0

Additions
4.5

 
3.3

Other
0.6

 
—

Amortization expense
(2.8
)
 
(2.1
)
Foreign currency translation
(0.2
)
 
(0.1
)
Total other intangibles subject to amortization, net of accumulated amortization of $26.9 and $24.1, respectively
$
12.2

 
$
10.1

 
 
 
 
Total other intangibles not subject to amortization
2.1

 
2.1

Total other intangibles
$
14.3

 
$
12.2
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: 
2020
$
3.1

2021
2.7

2022
2.4

2023
1.1

2024
0.8

Thereafter
2.1