Quarterly Data (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Aug. 03, 2014	Apr. 27, 2014	Jan. 26, 2014	Oct. 27, 2013	Jul. 28, 2013	Apr. 28, 2013	Jan. 27, 2013	Oct. 28, 2012	Aug. 03, 2014		Jul. 28, 2013		Jul. 29, 2012
Net sales	$ 1,852	$ 1,970	$ 2,281	$ 2,165	$ 1,723	$ 1,962	$ 2,162	$ 2,205	$ 8,268		$ 8,052		$ 7,175
Gross Profit	631	676	814	777	623	706	762	821
Earnings from continuing operations	137	184	235	181	117	169	171	232	726		680		724
Earnings (loss) from discontinued operations	0	0	90	(9)	(275)	12	19	13	81		(231)		40
Net Income (Loss) Attributable to Parent	137	184	325	172	(158)	181	190	245	818		458		774
Earnings (Loss) from Continuing Operations, Per Basic Share	$ 0.44	$ 0.59	$ 0.75	$ 0.58	$ 0.37	$ 0.54	$ 0.54	$ 0.74	$ 2.35		$ 2.19		$ 2.30
Earnings (loss) from discontinued operations, Per Basic Share	$ 0.00	$ 0.00	$ 0.29	$ (0.03)	$ (0.88)	$ 0.04	$ 0.06	$ 0.04	$ 0.26		$ (0.74)		$ 0.12
Earnings Per Share, Basic	$ 0.44	$ 0.59	$ 1.04	$ 0.55	$ (0.50)	$ 0.58	$ 0.61	$ 0.78	$ 2.61	[1]	$ 1.46	[1]	$ 2.43	[1]
Common Stock, Dividends, Per Share, Declared	$ 0.312	$ 0.312	$ 0.312	$ 0.312	$ 0.290	$ 0.000	$ 0.580	$ 0.290	$ 1.248		$ 1.16		$ 1.16
Earnings (Loss) from Continuing Operations, Per Diluted Share	$ 0.43	$ 0.58	$ 0.74	$ 0.57	$ 0.37	$ 0.53	$ 0.54	$ 0.73	$ 2.33		$ 2.17		$ 2.29
Earnings (loss) from discontinued operations, Per Diluted Share	$ 0.00	$ 0.00	$ 0.28	$ (0.03)	$ (0.87)	$ 0.04	$ 0.06	$ 0.04	$ 0.26		$ (0.73)		$ 0.12
Earnings Per Share, Diluted	$ 0.43	$ 0.58	$ 1.03	$ 0.54	$ (0.50)	$ 0.57	$ 0.60	$ 0.78	$ 2.59	[1]	$ 1.44	[1]	$ 2.41	[1]
Restructuring charges, after tax	15	1	5	15	19	14	30	27
Defined Benefit Plan Recognized Net Gain (Loss) Due to Settlements Net Of Tax	(3)	(11)	0	0
Derivatives (Gain) Loss	0	0	0	6
Other Tax Expense (Benefit)	0	0	0	7
Business Combination Acquisition Related Costs After Tax					0	0	0	7
Restructuring charges, Per Diluted Share	$ 0.05	$ 0.00	$ 0.02	$ 0.05	$ 0.06	$ 0.04	$ 0.09	$ 0.09
Business Combination Acquisition Related Costs, Per Diluted Share					$ 0.00	$ 0.00	$ 0.00	$ 0.02
Defined Benefit Plan Recognized (Gain) Loss Due To Settlements, Per Diluted Share	$ 0.01	$ 0.03	$ 0.00	$ 0.00
Derivative Gain Loss On Derivative Net, Per Diluted Share	$ 0.00	$ 0.00	$ 0.00	$ 0.02
Other Tax Expense Benefit, Per Diluted Share	$ 0.00	$ 0.00	$ 0.00	$ 0.02
Market Price Per Share High					$ 48.83	$ 46.85	$ 37.16	$ 36.28
Market Price Per Share Low					$ 42.32	$ 36.09	$ 34.30	$ 32.24
Discontinued Operations [Member]
Earnings (loss) from discontinued operations									81		(231)		40
Impairment Of Goodwill And Indefinite Lived Intangible Assets, Net Of Tax					263	0	0	0			263
Tax Effect of Difference Between Book Value and Tax Basis Resulting From Reorganization					18	0	0	0			18
Discontinued Operation, (Gain) Loss on Disposal of Discontinued Operation, Net of Tax	$ 0	$ 0	$ (90)	$ 18					$ (72)
(Income) Loss from Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.00	$ 0.00	$ (0.28)	$ 0.06					$ (0.23)
Impairment Of Goodwill And Indefinite Lived Intangible Assets, Per Share Diluted					$ 0.83	$ 0.00	$ 0.00	$ 0.00			$ 0.83
Deferred Other Tax Expense (Benefit), Per Share Diluted					$ 0.06	$ 0.00	$ 0.00	$ 0.00			$ 0.06
Maximum [Member]
Share Price	$ 46.67	$ 45.48	$ 43.70	$ 48.08					$ 46.67
Minimum [Member]
Share Price	$ 41.39	$ 39.60	$ 38.30	$ 39.87					$ 41.39

[1] The sum of the individual per share amounts may not add due to rounding.