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Accumulated Other Comprehensive Loss
12 Months Ended
Mar. 31, 2025
Equity [Abstract]  
Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss is comprised of the following at 31 March 2025:
(Millions of US dollars)Cash Flow
Hedges
Pension
Actuarial
Gain
Foreign
Currency
Translation
Adjustments
Total
Balance at 31 March 2024
$0.2 $1.3 $(69.8)$(68.3)
Other comprehensive (income) loss(0.1)0.1 1.6 1.6 
Reclassification to Restructuring expenses
— — 8.3 8.3 
Reclassification to Selling, general and administrative expenses
— — 0.2 0.2 
Balance at 31 March 2025
$0.1 $1.4 $(59.7)$(58.2)