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FINANCE EXPENSE - NET (Tables)
 12 Months Ended
Mar. 31, 2018
Analysis of income and expense [abstract]  
Schedule of finance expense - net
   
 
2018

 
2017

Finance expense:
 
 

 
 

Long-term debt (other than finance leases)
 
$
53.5

 
$
53.7

Finance leases
 
9.0

 
10.5

Royalty obligations
 
11.9

 
10.6

Employee benefits obligations (Note 14)
 
4.9

 
5.2

Financing cost amortization
 
1.4

 
1.5

Other
 
12.9

 
5.7

Borrowing costs capitalized (1)
 
(3.7
)
 
(3.2
)
Finance expense
 
$
89.9

 
$
84.0

Finance income:
 
 

 
 

Loans and finance lease contracts
 
$
(9.9
)
 
$
(8.2
)
Other
 
(3.8
)
 
(3.4
)
Finance income
 
$
(13.7
)
 
$
(11.6
)
Finance expense – net
 
$
76.2

 
$
72.4

(1) The average capitalization rate used during fiscal 2018 to determine the amount of borrowing costs eligible for capitalization was 4.33% (2017 – 4.37%).