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Inventories	9 Months Ended
Inventories	Oct. 31, 2011
Inventories [Abstract]
Inventories	Note 4. Inventories The Company values inventories at the lower of cost or market as determined primarily by the retail method of accounting, using the last-in, first-out ("LIFO") method for substantially all of the Walmart U.S. segment's merchandise inventories. The retail method of accounting results in inventory being valued at the lower of cost or market since permanent markdowns are currently taken as a reduction of the retail value of inventory. The Sam's Club segment's merchandise is valued based on the weighted-average cost using the LIFO method. Inventories for the Walmart International operations are primarily valued by the retail method of accounting and are stated using the first-in, first-out ("FIFO") method. At October 31, 2011 and 2010, the Company's inventories valued at LIFO approximate those inventories as if they were valued at FIFO.

The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.

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