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Restructuring Expenses (Tables)

12 Months Ended

Mar. 31, 2025

Restructuring and Related Activities [Abstract]

Schedule of Restructuring and Related Costs

Restructuring expenses consist of the following:

			Restructuring Expenses
			31 March
(Millions of US dollars)			2025						2024
Equipment write-offs, including disposal costs			$	30.3					$	—
Reclassification of foreign currency translation adjustments			8.3						—
Other exit costs			11.7						—
Asia Pacific Fiber Cement segment			50.3						—
General Corporate			—						20.1
Total			$	50.3					$	20.1

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- References

No definition available.

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- Definition

Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-1

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-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

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