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Operating Segment Information and Concentrations of Risk (Details 1) (USA & Europe Fibre Cement [Member], USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Mar. 31, 2012
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Mar. 31, 2011
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Mar. 31, 2010
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| Summary of gross sales by major customers | |||
| Gross Sales of Major Customers | $ 343.1 | $ 342.9 | $ 368.9 |
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Customer A [Member]
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| Summary of gross sales by major customers | |||
| Gross Sales of Major Customers | 207.4 | 208.9 | 224.4 |
| Gross sales percentage | 16.80% | 17.90% | 20.00% |
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Customer B [Member]
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| Summary of gross sales by major customers | |||
| Gross Sales of Major Customers | $ 135.7 | $ 134.0 | $ 144.5 |
| Gross sales percentage | 11.00% | 11.50% | 12.80% |
| X | ||||||||||
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- Details
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| 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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| X | ||||||||||
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- Definition
Major customer percentage of the Company's total gross sales. No definition available.
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