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PROVISIONS (Tables)
 12 Months Ended
Mar. 31, 2019
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]  
Schedule of provisions
Changes in provisions are as follows:
 
Restoration
 
 
 
 
 
 
 
 
 

 
 

and removal
 
Restructuring
 
 
Legal

Warranties
 
 
Other

 
Total

Total provisions, beginning of year
$
8.6

$
16.8

$
3.3

$
40.0

$
2.9

$
71.6

Additions
 
0.9

 
—

 
0.9

 
16.9

 
7.1

 
25.8

Amounts used
 
(1.5
)
 
(4.4
)
 
(0.5
)
 
(19.3
)
 
(5.4
)
 
(31.1
)
Unused amounts reversed
 
—

 
—

 
(0.2
)
 
(0.2
)
 
(0.3
)
 
(0.7
)
Exchange differences
 
—

 
(0.6
)
 
(0.1
)
 
0.1

 
—

 
(0.6
)
Total provisions, end of year
$
8.0

$
11.8

$
3.4

$
37.5

$
4.3

$
65.0

Less: current portion
 
0.3

 
3.8

 
2.7

 
18.7

 
3.2

 
28.7

Long-term portion
$
7.7

$
8.0

$
0.7

$
18.8

$
1.1

$
36.3