Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Capital Stock Issued [Member]	Capital Stock In Treasury [Member]	Additional Paid-In Capital [Member]	Earnings Retained In The Business [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interests [Member]
Capital stock, shares at Jul. 31, 2016		323
Treasury stock, shares at Jul. 31, 2016			(15)
Balance, value at Jul. 31, 2016	$ 1,533	$ 12	$ (664)	$ 354	$ 1,927	$ (104)	$ 8
Net earnings (loss)	393				393		0
Other comprehensive income (loss)	(8)					(9)	1
Dividends	$ (218)				(218)
Dividends per share	$ 0.70
Treasury stock purchased, shares			(4)
Treasury stock purchased, value	$ (234)		$ (234)
Treasury stock issued under management incentive and stock option plans, shares			1
Treasury stock issued under management incentive and stock option plans, value	13		$ 33	(20)
Capital stock, shares at Jan. 29, 2017		323
Treasury stock, shares at Jan. 29, 2017			(18)
Balance, value at Jan. 29, 2017	1,479	$ 12	$ (865)	334	2,102	(113)	9
Capital stock, shares at Jul. 30, 2017		323
Treasury stock, shares at Jul. 30, 2017			(22)
Balance, value at Jul. 30, 2017	1,645	$ 12	$ (1,066)	359	2,385	(53)	8
Net earnings (loss)	560				560		0
Other comprehensive income (loss)	31					32	(1)
Dividends	$ (211)				(211)
Dividends per share	$ 0.70
Treasury stock purchased, shares			(2)
Treasury stock purchased, value	$ (86)		$ (86)
Treasury stock issued under management incentive and stock option plans, shares			2
Treasury stock issued under management incentive and stock option plans, value	10		$ 48	(38)
Capital stock, shares at Jan. 28, 2018		323
Treasury stock, shares at Jan. 28, 2018			(22)
Balance, value at Jan. 28, 2018	$ 1,949	$ 12	$ (1,104)	$ 321	$ 2,734	$ (21)	$ 7