Acquisitions, Disposals, and Related Items Acquisitions, Disposals, and Related Items (Details) (USD $)	9 Months Ended
	Oct. 31, 2013
Agreed Upon Sales Price	$ 625,000,000
Redeemable Noncontrolling Interest, Change In Redemption Value	977,000,000
Redemption Value of Redeemable Noncontrolling Interest	1,400,000,000
Payments to Acquire Interest in Joint Venture	100,000,000
Indebtedness forgiven in connection with joint venture	$ 234,000,000
Walmart Chile Ownership Percentage [Member]
Sale of Stock, Percentage of Ownership after Transaction	99.70%
Public Ownership Percentage [Member]
Sale of Stock, Percentage of Ownership after Transaction	0.30%