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Inventories - Components of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013	Jan. 31, 2013	Oct. 31, 2012
Inventory Disclosure [Abstract]
Finished goods	$ 1,440,114	$ 1,291,235	$ 1,377,518
Raw materials	860,507	790,732	745,334
Work-in-process	118,089	152,367	166,719
Inventories, net	$ 2,418,710	$ 2,234,334	$ 2,289,571

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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