Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 31, 2016	Aug. 02, 2015	Aug. 03, 2014
Beginning Balance		$ 13	$ 12	$ 11
Charged to (Reduction in) Cost and Expense		117	118	115
Deductions		(118)	(117)	(116)
Acquisitions		0	0	2
Ending Balance		12	13	12
Actual Returns		95	105	118
Reserve for Cash Discount [Member]
Beginning Balance		5	4	5
Charged to (Reduction in) Cost and Expense		116	116	114
Deductions		(117)	(115)	(115)
Acquisitions		0	0	0
Ending Balance		4	5	4
Allowance for Doubtful Accounts [Member]
Beginning Balance		4	3	2
Charged to (Reduction in) Cost and Expense		(1)	2	0
Deductions		0	(1)	(1)
Acquisitions		0	0	2
Ending Balance		3	4	3
Allowance for Sales Returns [Member]
Beginning Balance	[1]	4	5	4
Charged to (Reduction in) Cost and Expense	[1]	2	0	1
Deductions	[1]	(1)	(1)	0
Acquisitions	[1]	0	0	0
Ending Balance	[1]	$ 5	$ 4	$ 5
Maximum [Member]
Percentage Of Actual Returns		2.00%	2.00%	2.00%

[1] The returns reserve is evaluated quarterly and adjusted accordingly. During each period, returns are charged to net sales in the Consolidated Statements of Earnings as incurred. Actual returns were approximately $95 in 2016, $105 in 2015 and $118 in 2014, or less than 2% of net sales.