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Debt (Tables)
12 Months Ended
Mar. 31, 2024
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
The Company’s debt obligations are as follows:
31 March
(Millions of US dollars)20242023
Unsecured debt:
3.625% Senior notes due 2026 (€400.0 million)
$431.0 $436.1 
5.000% Senior notes due 2028
400.0 400.0 
Term Loan298.1 — 
Unsecured revolving credit facility 230.0 
Unamortized debt issuance costs:(6.5)(7.1)
Total debt1,122.6 1,059.0 
Less current portion(7.5)— 
Total Long-term debt$1,115.1 $1,059.0 
Weighted average interest rate of Long-term debt5.1 %4.7 %
Weighted average term of available Long-term debt3.2 years4.0 years
Fair value of Senior unsecured notes (Level 1)
$811.5 $785.2 
Schedule of Debt Maturities
At 31 March 2024, the Company’s debt maturities for the next five fiscal years are as follows:
(Millions of US dollars)Amount
Fiscal 2025$7.5 
Fiscal 2026440.4 
Fiscal 202715.0
Fiscal 2028415.0
Fiscal 2029251.2
Total$1,129.1