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Cash and Cash Equivalents (Tables)
12 Months Ended
Mar. 31, 2015
Cash and Cash Equivalents [Abstract]  
Summary of Cash and Cash Equivalents

Cash and cash equivalents consist of the following components:

 

  31 March  
 (Millions of US dollars) 2015   2014  

 Cash at bank and on hand

 $             60.0       $ 70.9     

 Short-term deposits

  7.0        96.6     
  

 

 

    

 

 

 

Total cash and cash equivalents

 $ 67.0       $       167.5