Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Jul. 28, 2019	Oct. 27, 2019	Oct. 28, 2018	Oct. 29, 2017
Income Tax Examination [Line Items]
GILTI benefit reversed	$ 96
Tax expense for transition tax and remeasurement of deferred tax assets			$ 1,100
Tax expense related to changes in uncertain tax positions		$ 87
Excess tax benefit		42
Tax holiday benefit		$ 167
Tax holiday benefit per diluted share (in dollars per share)		$ 0.18
Increases in tax positions for prior years		$ 441	83	$ 33
Income tax penalties and interest expense (benefit)		24	12	17
Unrecognized tax benefits that would impact effective tax rate		758	294	284
Noncurrent Liabilities
Income Tax Examination [Line Items]
Interest and penalties related to uncertain tax positions		50	$ 26	46
Research and development tax credit carryforwards | State and Local Jurisdiction
Income Tax Examination [Line Items]
Tax credit carryforwards		264
Carried over until exhausted | State and Local Jurisdiction
Income Tax Examination [Line Items]
Tax credit carryforwards		252
Carried over the next fifteen years | State and Local Jurisdiction
Income Tax Examination [Line Items]
Tax credit carryforwards		$ 11
Tax credit carryforward, term		15 years
SINGAPORE
Income Tax Examination [Line Items]
Foreign statutory income tax rate			17.00%
ISRAEL | Foreign Tax Authority
Income Tax Examination [Line Items]
Income tax paid or accrued			$ 158
Income tax expense from settlement with tax authorities			$ 6
ITALY | Foreign Tax Authority
Income Tax Examination [Line Items]
Income tax paid or accrued				29
Income tax expense from settlement with tax authorities				$ 6