James Hardie Industries plc Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Cover
- Cover
- Audit Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Organization and Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Organization and Significant Accounting Policies - Narrative (Details)

v3.24.1.1.u2

Organization and Significant Accounting Policies - Narrative (Details) shares in Millions		12 Months Ended
	Jan. 01, 2024 USD ($)	Mar. 31, 2024 USD ($) director shares	Mar. 31, 2023 USD ($) shares	Mar. 31, 2022 USD ($) shares
Summary Of Significant Accounting Policies [Line Items]
Ownership interest rate percentage (as percent)		100.00%
Goodwill and intangible asset impairment \| $	$ 0
Advertising costs \| $		$ 110,800,000	$ 83,100,000	$ 53,700,000
Equity awards vested percentage after first year		25.00%
Equity awards vested percentage after second year		25.00%
Equity awards vested percentage after third year		50.00%
Number of trading days		20 days
Contingent Shares Not Expected To Vest
Summary Of Significant Accounting Policies [Line Items]
Potential diluted common shares outstanding (in shares) \| shares		0.6	0.4	0.7
Share-Based Payment Arrangement, Option
Summary Of Significant Accounting Policies [Line Items]
Vesting period		3 years
Minimum
Summary Of Significant Accounting Policies [Line Items]
Weighted average useful life of finite-lived intangible assets		2 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Weighted average useful life of finite-lived intangible assets		13 years
AICF Funding
Summary Of Significant Accounting Policies [Line Items]
Ownership interest rate percentage (as percent)		0.00%
AICF Funding
Summary Of Significant Accounting Policies [Line Items]
Number of directors appointed by Company \| director		3
AICF Funding \| New South Wales, Australia
Summary Of Significant Accounting Policies [Line Items]
Number of directors appointed by NSW government \| director		2

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