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)

Property, Plant and Equipment - Additional Information (Detail)

Property, Plant and Equipment - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 61.3	$ 60.0
Restricted assets value of property, plant and equipment	1.7	2.1
Asset impairment charges		16.9	14.3
USA & Europe Fibre Cement [Member]
Property, Plant and Equipment [Line Items]
Asset impairment charges	0	16.9	14.3
USA & Europe Fibre Cement [Member] \| Buildings, Land and Manufacturing Equipment [Member]
Property, Plant and Equipment [Line Items]
Asset impairment charges		4.4
USA & Europe Fibre Cement [Member] \| Redundant and Manufacturing Equipment [Member]
Property, Plant and Equipment [Line Items]
Asset impairment charges		12.5
USA & Europe Fibre Cement [Member] \| Redundant Equipment [Member]
Property, Plant and Equipment [Line Items]
Asset impairment charges		2.8
USA & Europe Fibre Cement [Member] \| Manufacturing Equipment [Member]
Property, Plant and Equipment [Line Items]
Asset impairment charges		$ 9.7

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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