XML 107 R70.htm IDEA: XBRL DOCUMENT v3.23.1

Product Warranties - Narrative (Details)	12 Months Ended
	Mar. 31, 2023
Guarantees [Abstract]
Limited warranty period	30 years

X

- Definition

Limited warranty period on its products.

+ References

No definition available.

+ Details

Name:	jhx_LimitedWarrantyPeriod
Namespace Prefix:	jhx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_GuaranteesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration