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PROVISIONS (Tables)
 12 Months Ended
Mar. 31, 2018
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
 
$
7.1

 
$
21.2

 
$
2.9

 
$
41.2

 
$
9.9

 
$
82.3

Additions
 
—

 
—

 
1.0

 
12.0

 
3.2

 
16.2

Acquisition of subsidiaries
 
1.6

 
—

 
—

 
—

 
0.6

 
2.2

Amounts used
 
(0.2
)
 
(5.6
)
 
(0.8
)
 
(15.3
)
 
(11.1
)
 
(33.0
)
Unused amounts reversed
 
(0.2
)
 
—

 
—

 
(0.1
)
 
(0.1
)
 
(0.4
)
Exchange differences
 
0.3

 
1.2

 
0.2

 
2.2

 
0.4

 
4.3

Total provisions, end of year
 
$
8.6

 
$
16.8

 
$
3.3

 
$
40.0

 
$
2.9

 
$
71.6

Less: current portion
 
1.6

 
6.8

 
2.6

 
18.9

 
2.2

 
32.1

Long-term portion
 
$
7.0

 
$
10.0

 
$
0.7

 
$
21.1

 
$
0.7

 
$
39.5