Condensed Consolidated Statement Of Shareholders' Equity (Unaudited) - 3 months ended Apr. 30, 2017 - 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	Noncontrolling interest
Balances at Jan. 31, 2017	$ 80,535	$ 305	$ 2,371	$ 89,354	$ (14,232)	$ 77,798	$ 2,737
Balances, in shares at Jan. 31, 2017		3,048
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income	3,152			3,039		3,039	113
Other comprehensive income (loss), net of income taxes	1,560				1,278	1,278	282
Cash dividends declared	(6,173)			(6,173)		(6,173)
Purchase of Company stock	(2,155)	$ (3)	(56)	(2,096)		(2,155)
Purchase of Company stock (in shares)		(30)
Dividends declared to noncontrolling interest	(698)						(698)
Other, in shares		5
Other	(107)		(92)	(4)		(96)	(11)
Balances at Apr. 30, 2017	$ 76,114	$ 302	$ 2,223	$ 84,120	$ (12,954)	$ 73,691	$ 2,423
Balances, in shares at Apr. 30, 2017		3,023