Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Aug. 03, 2014		Jul. 28, 2013		Jul. 29, 2012
Beginning Balance	$ 11		$ 10		$ 11
Charged to (Reduction in) Cost and Expense	115		116		113
Deductions	(116)		(115)		(114)
Acquisitions	2		0		0
Ending Balance	12		11		10
Actual Returns	118		124		122
Reserve for Cash Discount [Member]
Beginning Balance	5		4		5
Charged to (Reduction in) Cost and Expense	114		114		112
Deductions	(115)		(113)		(113)
Acquisitions	0		0		0
Ending Balance	4		5		4
Allowance for Doubtful Accounts [Member]
Beginning Balance	2		2		2
Charged to (Reduction in) Cost and Expense	0		1		1
Deductions	(1)		(1)		(1)
Acquisitions	2		0		0
Ending Balance	3		2		2
Allowance for Sales Returns [Member]
Beginning Balance	4	[1]	4	[1]	4	[1]
Charged to (Reduction in) Cost and Expense	1	[1]	1	[1]	0	[1]
Deductions	0	[1]	(1)	[1]	0	[1]
Acquisitions	0	[1]	0	[1]	0	[1]
Ending Balance	$ 5	[1]	$ 4	[1]	$ 4	[1]
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 $118 in 2014, $124 in 2013 and $122 in 2012, or less than 2% of net sales.