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Concentrations of Risk (Tables)

12 Months Ended

Mar. 31, 2025

Risks and Uncertainties [Abstract]

Summary of Gross Sales by Major Customers

The following represents net sales generated by this customer, which is from the North America Fiber Cement segment:

						Years Ended 31 March
(Millions of US dollars)						2025												2024												2023
Customer A						$	586.6					15.1		%				$	558.2					14.2		%				$	450.1					12.0		%

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- References

No definition available.

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- Definition

Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-20

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