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Accounts and Other Receivables
 12 Months Ended
Mar. 31, 2025
Receivables [Abstract]  
Accounts and Other Receivables Accounts and Other Receivables
Accounts and other receivables consist of the following components:
 31 March
(Millions of US dollars)20252024
Trade receivables$335.3 $321.2 
Income taxes receivable37.7 34.4 
Other receivables25.2 19.0 
Provision for doubtful trade receivables(6.4)(8.5)
Total$391.8 $366.1 
The following are changes in the provision for doubtful trade receivables:
 31 March
(Millions of US dollars)202520242023
Balance at beginning of period$8.5 $2.6 $3.4 
Adjustment to provision(0.7)6.2 (0.6)
Write-offs, net of recoveries(1.4)(0.3)(0.2)
Balance at end of period$6.4 $8.5 $2.6