Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
Apr. 30, 2015	Apr. 30, 2014
Consolidated net income	$ 3,283us-gaap_ProfitLoss	$ 3,726us-gaap_ProfitLoss
Less consolidated net income attributable to nonredeemable noncontrolling interest	58	(133)
Consolidated net income attributable to Walmart	3,341us-gaap_NetIncomeLoss	3,593us-gaap_NetIncomeLoss
Other comprehensive income (loss), net of income taxes
Currency translation and other	(1,684)	284
Minimum pension liability	70	4
Other comprehensive income (loss), net of income taxes	(1,558)	242
Less other comprehensive income (loss) attributable to nonredeemable noncontrolling interest	131	42
Other comprehensive income (loss) attributable to Walmart	(1,427)	284
Comprehensive income, net of income taxes	1,725	3,968
Less comprehensive income attributable to nonredeemable noncontrolling interest	189	(91)
Comprehensive income attributable to Walmart	1,914us-gaap_ComprehensiveIncomeNetOfTax	3,877us-gaap_ComprehensiveIncomeNetOfTax
Net Investment Hedging [Member]
Other comprehensive income (loss), net of income taxes
Derivative instruments	(64)	(50)
Cash Flow Hedging [Member]
Other comprehensive income (loss), net of income taxes
Derivative instruments	$ 120	$ 4

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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