XML 68 R31.htm IDEA: XBRL DOCUMENT
v3.23.1

Cash and Cash Equivalents, Restricted Cash and Restricted Cash - Asbestos (Tables) | 12 Months Ended
--- | ---
Mar. 31, 2023
Cash and Cash Equivalents, Restricted Cash and Restricted Cash - Asbestos [Abstract] |
Reconciliation of Cash and Cash Equivalents, Restricted Cash and Restricted Cash - Asbestos | The following table provides a reconciliation of Cash and cash equivalents, Restricted cash and Restricted cash - Asbestos reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows:
| 31 March
(Millions of US dollars) | 2023 |  | 2022 |  |  |  |
Cash and cash equivalents | $ | 113.0 |  |  | $ | 125.0 |  |  |  |  |
Restricted cash | 5.0 |  |  | 5.0 |  |  |  |  |
Restricted cash - Asbestos | 67.6 |  |  | 141.9 |  |  |  |  |
Total cash and cash equivalents, restricted cash and restricted cash - Asbestos | $ | 185.6 |  |  | $ | 271.9 |  |  |  |  |
Reconciliation of Cash and Cash Equivalents, Restricted Cash and Restricted Cash - Asbestos | The following table provides a reconciliation of Cash and cash equivalents, Restricted cash and Restricted cash - Asbestos reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows:
| 31 March
(Millions of US dollars) | 2023 |  | 2022 |  |  |  |
Cash and cash equivalents | $ | 113.0 |  |  | $ | 125.0 |  |  |  |  |
Restricted cash | 5.0 |  |  | 5.0 |  |  |  |  |
Restricted cash - Asbestos | 67.6 |  |  | 141.9 |  |  |  |  |
Total cash and cash equivalents, restricted cash and restricted cash - Asbestos | $ | 185.6 |  |  | $ | 271.9 |  |  |  |  |

X
- Definition Cash and Cash Equivalents, Restricted Cash and Restricted Cash - Asbestos [Abstract] + References No definition available. + Details
Name: | jhx_CashandCashEquivalentsRestrictedCashandRestrictedCashAsbestosAbstract
Namespace Prefix: | jhx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cash and cash equivalents restricted as to withdrawal or usage. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 8 -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-8 + Details
Name: | us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration