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)

Reclassifications Out of Accumulated Other Comprehensive Income (Loss) - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Detail)

Reclassifications Out of Accumulated Other Comprehensive Income (Loss) - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	$ 47.4
Other comprehensive loss before reclassifications	(15.2)
Cash flow hedges	0.9
Net current-period other comprehensive loss	(14.3)
Ending balance	33.1
Pension and Post-Retirement Benefit Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	(0.3)
Other comprehensive loss before reclassifications
Cash flow hedges
Net current-period other comprehensive loss
Ending balance	(0.3)
Unrealised Gain (Loss) on Investments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance
Other comprehensive loss before reclassifications
Cash flow hedges
Net current-period other comprehensive loss
Ending balance
Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance
Other comprehensive loss before reclassifications
Cash flow hedges	0.9
Net current-period other comprehensive loss	0.9
Ending balance	0.9
Foreign Currency Translation Adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	47.7
Other comprehensive loss before reclassifications	(15.2)
Cash flow hedges
Net current-period other comprehensive loss	(15.2)
Ending balance	$ 32.5

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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