Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Jul. 28, 2019	Oct. 31, 2021	Oct. 25, 2020	Oct. 27, 2019
Income Tax Examination [Line Items]
GILTI benefit reversed	$ 96
Tax holiday benefit		$ 370	$ 215
Tax holiday benefit per diluted share (in dollars per share)		$ 0.40	$ 0.23
Unrecognized tax benefits, decrease resulting from settlements with taxing authorities		$ 0	$ 446	$ 1
Increases in tax positions for prior years		23	91	441
Income tax penalties and interest expense (benefit)		14	24	24
Unrecognized tax benefits that would impact effective tax rate		442	410	758
Noncurrent Liabilities
Income Tax Examination [Line Items]
Interest and penalties related to uncertain tax positions		88	74	$ 50
Research and development tax credit carryforwards | State and Local Jurisdiction
Income Tax Examination [Line Items]
Tax credit carryforwards		369
Carried over until exhausted | State and Local Jurisdiction
Income Tax Examination [Line Items]
Tax credit carryforwards		345
Carried over the next fifteen years | State and Local Jurisdiction
Income Tax Examination [Line Items]
Tax credit carryforwards		$ 20
Tax credit carryforward, term		15 years
SINGAPORE
Income Tax Examination [Line Items]
Foreign statutory income tax rate		17.00%
Income tax expense recognized from settled tax audits			26
SINGAPORE | Foreign Tax Authority
Income Tax Examination [Line Items]
Income tax paid or accrued			72
Unrecognized tax benefits, decrease resulting from settlements with taxing authorities			$ 374