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Goodwill and Intangible Assets
 6 Months Ended
Sep. 30, 2018
Goodwill and Intangible Assets [Abstract]  
Goodwill and Intangible Assets
Note 13: Goodwill and Intangible Assets

Changes in the carrying amount of goodwill were as follows:

  
VTS
  
Building
HVAC
  
CIS
  
Total
 
Goodwill, March 31, 2018
 
$
0.5
  
$
15.0
  
$
158.3
  
$
173.8
 
Effect of exchange rate changes
  
-
   
(0.9
)
  
(3.2
)
  
(4.1
)
Goodwill, September 30, 2018
 
$
0.5
  
$
14.1
  
$
155.1
  
$
169.7
 

Intangible assets consisted of the following:

  
September 30, 2018
  
March 31, 2018
 
 
 
Gross
Carrying
Value
  
Accumulated
Amortization
  
Net
Intangible
Assets
  
Gross
Carrying
Value
  
Accumulated
Amortization
  
Net
Intangible
Assets
 
Customer relationships
 
$
62.4
  
$
(7.4
)
 
$
55.0
  
$
64.2
  
$
(5.7
)
 
$
58.5
 
Trade names
  
59.3
   
(11.9
)
  
47.4
   
60.6
   
(10.8
)
  
49.8
 
Acquired technology
  
24.3
   
(4.5
)
  
19.8
   
25.2
   
(3.6
)
  
21.6
 
Total intangible assets
 
$
146.0
  
$
(23.8
)
 
$
122.2
  
$
150.0
  
$
(20.1
)
 
$
129.9
 

The Company recorded amortization expense of $2.3 million and $2.4 million for the three months ended September 30, 2018 and 2017, respectively. The Company recorded amortization expense of $4.6 million and $4.8 million for the six months ended September 30, 2018 and 2017, respectively. The Company estimates that it will record $4.5 million of amortization expense during the remainder of fiscal 2019, $9.0 million of amortization expense in fiscal 2020 and approximately $8.0 million of annual amortization expense in fiscal 2021 through 2024.