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Accounts and Other Receivables (Tables)
12 Months Ended
Mar. 31, 2022
Receivables [Abstract]  
Components of Accounts and Other Receivables
Accounts and other receivables consist of the following components:
 31 March
(Millions of US dollars)20222021
Trade receivables$336.4 $296.7 
Income taxes receivable29.8 25.4 
Other receivables and advances35.6 17.2 
Provision for doubtful trade receivables(3.4)(6.1)
Total accounts and other receivables$398.4 $333.2 
Provision for Doubtful Trade Debts
The following are changes in the provision for doubtful trade receivables:
 31 March
(Millions of US dollars)202220212020
Balance at beginning of period$6.1 $4.4 $2.9 
Adjustment to provision(2.2)3.1 1.7 
Write-offs, net of recoveries(0.5)(1.4)(0.2)
Balance at end of period$3.4 $6.1 $4.4