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Derivative Instruments (Tables)

12 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments

The following table sets forth the total outstanding notional amount and the fair value of the Company’s derivative instruments held at 31 March 2024 and 2023:

															Fair Value as of
(Millions of US dollars)			Notional Amount												31 March 2024												31 March 2023
Derivatives not accounted for as hedges			31 March 2024						31 March 2023						Assets						Liabilities						Assets						Liabilities
Foreign currency forward contracts			$	20.1					$	269.0					$	0.2					$	0.7					$	2.2					$	11.4

Gain (Loss) on the Company's Foreign Currency Forward Contracts Recorded in the Consolidated Statements of Operations and Comprehensive Income

The following table sets forth the gain and loss on the Company’s foreign currency forward contracts recorded in the Company’s consolidated statements of operations and comprehensive income as follows:

			31 March
(Millions of US dollars)			2024						2023						2022
Asbestos adjustments loss			$	7.8					$	24.5					$	5.3
Selling, general and administrative expenses (income)			—						4.0						(2.1)
Total loss			$	7.8					$	28.5					$	3.2

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Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

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Tabular disclosure of derivative instrument not designated or qualifying as hedging instrument.

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