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Property, Plant and Equipment - Useful Lives of Property, Plant and Equipment (Detail)
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9 Months Ended |
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Feb. 28, 2014
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Land improvements [Member]
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| Property, Plant and Equipment [Line Items] | |
| Useful life of property, plant and equipment | 20 years |
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Buildings and leasehold improvements [Member]
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| Property, Plant and Equipment [Line Items] | |
| Useful life of property, plant and equipment | 30 years |
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Machinery and equipment [Member] | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Useful life of property, plant and equipment | 5 years |
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Machinery and equipment [Member] | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |
| Useful life of property, plant and equipment | 10 years |
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Instruments [Member]
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| Property, Plant and Equipment [Line Items] | |
| Useful life of property, plant and equipment | 4 years |