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Commitments and Contingencies (Tables)
12 Months Ended
Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Future Minimum Lease Payments for Non-Cancellable Operating Leases

The following are future minimum lease payments for non-cancellable operating leases having a remaining term in excess of one year at 31 March 2016:

 

Years ending 31 March (Millions of US dollars):        

2017

     $ 18.0     

2018

     15.0     

2019

     11.8     

2020

     8.3     

2021

     3.3     

Thereafter

     4.2     
  

 

 

 

Total

     $       60.6