James Hardie Industries plc Annual and transition report of foreign private issuers [Sections 13 or 15(d)]

Annual and transition report of foreign private issuers [Sections 13 or 15(d)]

Concentrations of Risk - Summary of Gross Sales by Major Customers (Details)

Concentrations of Risk - Summary of Gross Sales by Major Customers (Details) - Customer A - Sales Revenue, Net - Customer Concentration Risk - North America Fiber Cement - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Concentration Risk [Line Items]
Net sales	$ 586.6	$ 558.2	$ 450.1
Concentration risk, percentage	15.10%	14.20%	12.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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