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

Long-Term Debt - Schedule of Long-term Debt Instruments (Details)

v3.21.1

Long-Term Debt - Schedule of Long-term Debt Instruments (Details) € in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021 EUR (€)	Jan. 15, 2021	Oct. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total Long-term debt	$ 858.6	$ 1,354.6
Weighted average interest rate of Long-term debt	4.30%	4.30%	4.30%
Weighted average term of available Long-term debt	4 years 6 months	5 years 3 months 18 days
Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 868.3	$ 1,240.7
Senior Notes \| Level 1
Debt Instrument [Line Items]
Fair value of Senior unsecured notes (Level 1)	904.7	1,147.7
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	0.0	130.0
Unamortized debt issuance costs	(1.2)	$ (1.9)
4.75% Senior Unsecured Notes Due 2025 \| Senior Notes
Debt Instrument [Line Items]
Interest rate (as percent)		4.75%		4.75%
Long-term debt, gross	0.0	$ 400.0
Unamortized debt issuance costs	$ 0.0	(4.3)
3.625% Senior Unsecured Notes Due 2026 \| Senior Notes
Debt Instrument [Line Items]
Interest rate (as percent)	3.625%		3.625%		3.625%
Long-term debt, gross	$ 468.3	440.7	€ 400
Unamortized debt issuance costs	$ (4.2)	(5.0)
5.000% Senior Unsecured Notes Due 2028
Debt Instrument [Line Items]
Interest rate (as percent)						5.00%
5.000% Senior Unsecured Notes Due 2028 \| Senior Notes
Debt Instrument [Line Items]
Interest rate (as percent)	5.00%		5.00%
Long-term debt, gross	$ 400.0	400.0
Unamortized debt issuance costs	$ (4.3)	$ (4.9)

- Definition

Long-Term Debt, Weighted Average Term Of Available Debt

+ References

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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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

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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