|
Asbestos - Asbestos-Related Assets and Liabilities (Detail) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2015
|
Mar. 31, 2014
|
|---|---|---|
| Insurance [Abstract] | ||
| Asbestos liability - current | $ (131.6)jhx_AsbestosFundLiabilityCurrent | $ (134.5)jhx_AsbestosFundLiabilityCurrent |
| Asbestos liability - non-current | (1,290.0)jhx_AsbestosFundLiabilityNonCurrent | (1,571.7)jhx_AsbestosFundLiabilityNonCurrent |
| Asbestos liability - Total | (1,421.6)jhx_AsbestosFundLiability | (1,706.2)jhx_AsbestosFundLiability |
| Insurance receivable - current | 16.7jhx_InsuranceReceivableAsbestosCurrent | 28.0jhx_InsuranceReceivableAsbestosCurrent |
| Insurance receivable - non-current | 161.9jhx_InsuranceReceivableAsbestosNoncurrent | 198.1jhx_InsuranceReceivableAsbestosNoncurrent |
| Insurance receivable - Total | 178.6jhx_InsuranceReceivableAsbestos | 226.1jhx_InsuranceReceivableAsbestos |
| Workers' compensation asset - current | 4.5jhx_WorkersCompensationAssetsAsbestosCurrent | 4.3jhx_WorkersCompensationAssetsAsbestosCurrent |
| Workers' compensation asset - non-current | 45.5jhx_WorkersCompensationAssetsAsbestosNoncurrent | 47.6jhx_WorkersCompensationAssetsAsbestosNoncurrent |
| Workers' compensation liability - current | (4.5)jhx_WorkersCompensationLiabilityAsbestosCurrent | (4.3)jhx_WorkersCompensationLiabilityAsbestosCurrent |
| Workers' compensation liability - non-current | (45.5)jhx_WorkersCompensationLiabilitiesAsbestosNoncurrent | (47.6)jhx_WorkersCompensationLiabilitiesAsbestosNoncurrent |
| Workers' compensation - Total | 0jhx_AsbestosWorkersCompensationAssetsLiabilitiesNet | 0jhx_AsbestosWorkersCompensationAssetsLiabilitiesNet |
| Loan facility | (13.6)jhx_CurrentPortionOfLongTermDebtAsbestos | (47.0)jhx_CurrentPortionOfLongTermDebtAsbestos |
| Other net liabilities | (1.5)jhx_OtherNetAssetsLiabilitiesRelatedToAsbestos | (0.8)jhx_OtherNetAssetsLiabilitiesRelatedToAsbestos |
| Restricted cash and cash equivalents and restricted short-term investment assets of AICF | 22.0jhx_RestrictedCashAndCashEquivalentsAndShortTermInvestmentsAsbestos | 60.3jhx_RestrictedCashAndCashEquivalentsAndShortTermInvestmentsAsbestos |
| Net AFFA liability | (1,236.1)jhx_AsbestosNetAmendedLiability | (1,467.6)jhx_AsbestosNetAmendedLiability |
| Deferred income taxes - current | 15.9jhx_DeferredTaxAssetsNetAsbestosCurrent | 16.5jhx_DeferredTaxAssetsNetAsbestosCurrent |
| Deferred income taxes - non-current | 389.3jhx_DeferredTaxAssetsNetAsbestosNoncurrent | 455.2jhx_DeferredTaxAssetsNetAsbestosNoncurrent |
| Deferred income taxes - Total | 405.2jhx_DeferredTaxAssetsNetAsbestos | 471.7jhx_DeferredTaxAssetsNetAsbestos |
| Income tax payable | 19.2jhx_IncomeTaxPayableAsbestos | 16.7jhx_IncomeTaxPayableAsbestos |
| Net Unfunded AFFA liability, net of tax | $ (811.7)jhx_AsbestosUnfundedNetAmendedLiability | $ (979.2)jhx_AsbestosUnfundedNetAmendedLiability |
| X | ||||||||||
|
- Definition
Carrying amount as of the balance sheet date for total reserves related to asbestos claims. No definition available.
|
| X | ||||||||||
|
- Definition
Carrying value as of the balance sheet date of asbestos-related obligations incurred through that date and due within one year for estimated future asbestos claims. No definition available.
|
| X | ||||||||||
|
- Definition
Carrying value as of the balance sheet date of asbestos-related obligations incurred through that date and due after one year for estimated future asbestos claims. No definition available.
|
| X | ||||||||||
|
- Definition
Asbestos net amended liability. No definition available.
|
| X | ||||||||||
|
- Definition
Asbestos unfunded net amended liability. No definition available.
|
| X | ||||||||||
|
- Definition
Asbestos workers compensation assets liabilities net. No definition available.
|
| X | ||||||||||
|
- Definition
Total portion of carrying amounts as of the balance sheet date of AICF drawdown of loan facility with The State of New South Wales Australia. All amounts outstanding were fully repaid on 3 April 2012. No definition available.
|
| X | ||||||||||
|
- Definition
Total Australian tax benefits as of the balance sheet date that will be available to the Company in relation to the Company's contributions to the AICF. No definition available.
|
| X | ||||||||||
|
- Definition
Current portion of Australian tax benefits as of the balance sheet date that will be available to the Company during the subsequent twelve months in relation to the Company's contributions to the AICF. No definition available.
|
| X | ||||||||||
|
- Definition
Non current portion of Australian tax benefits as of the balance sheet date that will be available to the Company in relation to the Company's contributions to the AICF. No definition available.
|
| X | ||||||||||
|
- Definition
Australian tax deduction available to be taken by the Company resulting from the Company's previous contributions to AICF. No definition available.
|
| X | ||||||||||
|
- Definition
Total receivable due as of the balance sheet date from various insurance policies and insurance companies for reimbursement and payment of asbestos claims. No definition available.
|
| X | ||||||||||
|
- Definition
The estimated receivable due within one year of the balance sheet date from various insurance policies and insurance companies for reimbursement and payment of asbestos claims. No definition available.
|
| X | ||||||||||
|
- Definition
The estimated receivable due after one year from the balance sheet date from various insurance policies and insurance companies for reimbursement and payment of asbestos claims. No definition available.
|
| X | ||||||||||
|
- Definition
Comprised of a provision for asbestos-related education and medical research contributions and other assets and liabilities of the AICF. No definition available.
|
| X | ||||||||||
|
- Definition
Total carrying amounts of cash and cash equivalents and short term investments of the AICF that are restricted for use in the settlement of asbestos claims and payment of the operating costs of the AICF. No definition available.
|
| X | ||||||||||
|
- Definition
Current amount of workers compensation receivable that is expected to be paid within one year of the balance sheet by the workers' compensation schemes or policies of the Former James Hardie Companies. No definition available.
|
| X | ||||||||||
|
- Definition
Noncurrent amount of workers compensation receivable that is expected to be paid after one year of the balance sheet by the workers' compensation schemes or policies of the Former James Hardie Companies. No definition available.
|
| X | ||||||||||
|
- Definition
Noncurrent portion of workers' compensation claims (due after one year or the normal operating cycle, if longer) that are expected to be met by the workers' compensation schemes or policies of the Former James Hardie Companies. Since these amounts are expected to be paid by the workers' compensation schemes or policies, the company records an equivalent workers' compensation receivable. No definition available.
|
| X | ||||||||||
|
- Definition
Current portion of workers' compensation claims (due within one year or within the normal operating cycle if longer) that are expected to be met by the workers' compensation schemes or policies of the Former James Hardie Companies. Since these amounts are expected to be paid by the workers' compensation schemes or policies, the company records an equivalent workers' compensation receivable. No definition available.
|
| X | ||||||||||
|
- Details
|