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Accounts Payable and Accrued Liabilities (Tables)
12 Months Ended
Mar. 31, 2018
Payables and Accruals [Abstract]  
Components of Accounts Payable and Accrued Liabilities
Accounts payable and accrued liabilities consist of the following components:
 
31 March
(Millions of US dollars)
2018
 
2017
Trade creditors
$
111.8

 
$
108.4

Accrued interest
12.5

 
4.8

Other creditors and accruals
69.0

 
60.3

Total accounts payable and accrued liabilities
$
193.3

 
$
173.5