Goodwill, Purchased Technology and Other Intangible Assets (Finite-lived Intangible Assets) (Details) - USD ($) $ in Millions	Oct. 25, 2020	Oct. 27, 2019
Amortized intangible assets
Gross carrying amount	$ 2,041	$ 1,988
Accumulated amortization	(1,888)	(1,832)
Carrying amount	153	156
Purchased technology, net
Amortized intangible assets
Gross carrying amount	1,687	1,645
Accumulated amortization	(1,612)	(1,574)
Carrying amount	75	71
Other Intangible Assets
Amortized intangible assets
Gross carrying amount	354	343
Accumulated amortization	(276)	(258)
Carrying amount	78	85
Operating Segments | Semiconductor Systems
Amortized intangible assets
Gross carrying amount	1,732	1,701
Accumulated amortization	(1,608)	(1,568)
Operating Segments | Semiconductor Systems | Purchased technology, net
Amortized intangible assets
Gross carrying amount	1,476	1,449
Accumulated amortization	(1,423)	(1,400)
Operating Segments | Semiconductor Systems | Other Intangible Assets
Amortized intangible assets
Gross carrying amount	256	252
Accumulated amortization	(185)	(168)
Operating Segments | Applied Global Services
Amortized intangible assets
Gross carrying amount	79	77
Accumulated amortization	(75)	(74)
Operating Segments | Applied Global Services | Purchased technology, net
Amortized intangible assets
Gross carrying amount	35	33
Accumulated amortization	(31)	(30)
Operating Segments | Applied Global Services | Other Intangible Assets
Amortized intangible assets
Gross carrying amount	44	44
Accumulated amortization	(44)	(44)
Operating Segments | Display and Adjacent Markets
Amortized intangible assets
Gross carrying amount	201	201
Accumulated amortization	(194)	(181)
Operating Segments | Display and Adjacent Markets | Purchased technology, net
Amortized intangible assets
Gross carrying amount	163	163
Accumulated amortization	(157)	(144)
Operating Segments | Display and Adjacent Markets | Other Intangible Assets
Amortized intangible assets
Gross carrying amount	38	38
Accumulated amortization	(37)	(37)
Corporate and Other
Amortized intangible assets
Gross carrying amount	29	9
Accumulated amortization	(11)	(9)
Corporate and Other | Purchased technology, net
Amortized intangible assets
Gross carrying amount	13	0
Accumulated amortization	(1)	0
Corporate and Other | Other Intangible Assets
Amortized intangible assets
Gross carrying amount	16	9
Accumulated amortization	$ (10)	$ (9)