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Inventories - Components of Inventories (Detail) (USD $)	Jan. 31, 2015	Jan. 31, 2014
Inventory Disclosure [Abstract]
Finished goods	$ 1,386,823,000	$ 1,333,926,000
Raw materials	866,934,000	874,799,000
Work-in-process	108,355,000	117,855,000
Inventories, net	$ 2,362,112,000us-gaap_InventoryNet	$ 2,326,580,000us-gaap_InventoryNet

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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