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OTHER GAINS - NET (Tables)
 12 Months Ended
Mar. 31, 2018
Analysis of income and expense [abstract]  
Schedule of other gains

2018

 
2017

Disposal of property, plant and equipment
$
9.7

 
$
7.7

Net foreign exchange gains
2.5

 
0.1

Net loss on litigation
—

 
(1.1
)
Disposal of interest in investment
14.3

 
—

Remeasurement of investment, net of reorganization and others costs
12.2

 
—

Other
(1.3
)
 
6.0

Other gains – net
$
37.4

 
$
12.7