Supplemental Financial Statement Data (Schedule of Statement of Earnings) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Apr. 26, 2020	Apr. 28, 2019	Apr. 26, 2020	Apr. 28, 2019
Amortization of Intangible Assets		$ 11	$ 13	$ 33	$ 36
Net periodic benefits expense (income), other than the service cost		(22)	(20)	(68)	(60)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		(54)	(28)	(43)	(28)
Investment (gains) / losses				49	0
Net (gain) loss on sale of business				(975)	18
Transition services fees		(3)	0	(5)	0
Other Income		4	(7)	1	(9)
Other expenses / (income)		81	20	115	12
Corporate, Non-Segment [Member]
Net (gain) loss on sale of business				64
European chips business [Member]
Net (gain) loss on sale of business	[1]	0	0	64	0
Acre Venture Partners [Member] | Corporate, Non-Segment [Member]
Investment (gains) / losses		45		45
Other Assets [Member]
Investment (gains) / losses	[2]	$ 45	$ (8)	$ 49	$ (1)

[1] See Note 3 for additional information

[2] Includes a loss of $45 on Acre for the three- and nine-month periods ended April 26, 2020. See Note 14 for additional information.