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Operating Segment Information and Concentrations of Risk - Summary of Gross Sales by Major Customers (Detail) (USA and Europe Fibre Cement [Member], USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Mar. 31, 2013
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Mar. 31, 2012
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Mar. 31, 2011
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| Segment Reporting Information [Line Items] | |||
| Gross Sales of Major Customers | $ 360.7 | $ 343.1 | $ 342.9 |
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Customer A [Member]
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| Segment Reporting Information [Line Items] | |||
| Gross Sales of Major Customers | 223.0 | 207.4 | 208.9 |
| Gross sales percentage | 16.90% | 16.80% | 17.90% |
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Customer B [Member]
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| Segment Reporting Information [Line Items] | |||
| Gross Sales of Major Customers | $ 137.7 | $ 135.7 | $ 134.0 |
| Gross sales percentage | 10.40% | 11.00% | 11.50% |
| X | ||||||||||
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- Definition
Gross sales of the Company's major customers that individually account for over 10% of the Company's net sales in one or all of the past three fiscal years. No definition available.
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- Definition
Major customer percentage of the Company's total gross sales. No definition available.
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- Details
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