Supplemental Financial Statement Data (Schedule of Statement of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended					6 Months Ended
	Jan. 31, 2021		Jan. 26, 2020		Oct. 27, 2019	Jan. 31, 2021		Jan. 26, 2020
Amortization of Intangible Assets	$ 11		$ 11			$ 21		$ 22
Net periodic benefits expense (income), other than the service cost	(20)		(23)			(41)		(46)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), (Gain) Loss Due to Settlement	(30)		(11)			(34)		(11)
Investment (gains) / losses	0		0			0		4
Net (gain) loss on sale of business						0		(972)
Transition services fees	(8)		(1)			(12)		(2)
Other	2		2			3		3
Other expenses / (income)	(45)		(22)			(63)		34
European chips business [Member]
Net (gain) loss on sale of business	$ 0	[1]	$ 0	[1]	$ 64	$ 0	[1]	$ 64	[1]

[1] See Note 3 for additional information.