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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2011	Jan. 31, 2011	Oct. 31, 2010
Inventories
Finished goods	$ 1,173,673	$ 988,085	$ 1,090,853
Raw materials	737,686	534,879	464,701
Work-in-process	154,107	102,338	98,998
Inventories, net	$ 2,065,466	$ 1,625,302	$ 1,654,552

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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