Condensed Consolidated Statement Of Shareholders' Equity (Unaudited) - 9 months ended Oct. 31, 2016 - USD ($) shares in Millions, $ in Millions	Total	Common stock	Capital in excess of par value	Retained earnings	Accumulated other comprehensive income (loss)	Total Walmart shareholders' equity	Nonredeemable noncontrolling interest
Balances at Jan. 31, 2016	$ 83,611	$ 317	$ 1,805	$ 90,021	$ (11,597)	$ 80,546	$ 3,065
Balances, in shares at Jan. 31, 2016		3,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income	10,307			9,886		9,886	421
Other comprehensive income (loss), net of income taxes	(830)				(738)	(738)	(92)
Cash dividends declared	(6,221)			(6,221)		(6,221)
Purchase of Company stock	(6,178)	$ (9)	(125)	(6,044)		(6,178)
Purchase of Company stock (in shares)		(89)
Dividends declared to noncontrolling interest	(522)						(522)
Other, in shares		6
Other	308		404	(6)		398	(90)
Balances at Oct. 31, 2016	$ 80,475	$ 308	$ 2,084	$ 87,636	$ (12,335)	$ 77,693	$ 2,782
Balances, in shares at Oct. 31, 2016		3,079