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Goodwill and Intangible Assets (Tables)
 6 Months Ended
Sep. 30, 2021
Goodwill and Intangible Assets [Abstract]  
Changes in Carrying Amount of Goodwill
The following table presents a rollforward of the carrying value of goodwill from March 31, 2021 to September 30, 2021.  The Company has revised the March 31, 2021 goodwill balances to be comparable with the current segment structure.

  
BHVAC
    
CIS
    
Total
  
Goodwill, March 31, 2021
  
$
47.0
    
$
123.7
    
$
170.7
  
Effect of exchange rate changes
    
(0.5
)
    
(0.1
)
    
(0.6
)
Goodwill, September 30, 2021
  
$
46.5
    
$
123.6
    
$
170.1
  
Intangible Assets
Intangible assets consisted of the following:

  
September 30, 2021
    
March 31, 2021
  
   
Gross
Carrying
Value
    
Accumulated
Amortization
    
Net
Intangible
Assets
    
Gross
Carrying
Value
    
Accumulated
Amortization
    
Net
Intangible
Assets
  
Customer relationships
  
$
62.5
    
$
(18.7
)
  
$
43.8
    
$
62.8
    
$
(16.9
)
  
$
45.9
  
Trade names
    
51.3
      
(12.6
)
    
38.7
      
51.5
      
(11.4
)
    
40.1
  
Acquired technology
    
23.7
      
(10.2
)
    
13.5
      
23.9
      
(9.3
)
    
14.6
  
Total intangible assets
  
$
137.5
    
$
(41.5
)
  
$
96.0
    
$
138.2
    
$
(37.6
)
  
$
100.6