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Inventories (Details) (USD $) In Millions, unless otherwise specified	Jan. 25, 2013	Apr. 27, 2012
Inventory Disclosure [Abstract]
Finished goods	$ 1,266	$ 1,175
Work in process	282	288
Raw materials	341	337
Total	$ 1,889	$ 1,800

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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