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Income Taxes Schedule of Unrecognized Tax Benefit (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jan. 31, 2016	Nov. 04, 2018	Oct. 29, 2017	Oct. 30, 2016
Income Tax Disclosure [Abstract]
Beginning of period	$ 578	$ 2,256	$ 1,983	$ 578
Lapse of statute of limitations		20	12	8
Increases in balances related to tax positions taken during prior periods (including those related to acquisitions made during the year)		361	47	1,325
Decreases in balances related to tax positions taken during prior periods		(289)	(32)	(1)
Increases in balances related to tax positions taken during current period		1,726	391	138
Decreases in balances related to settlement with taxing authorities		4	121	49
End of period		4,030	2,256	$ 1,983
Unrecognized Tax Benefits, Period Increase (Decrease)	$ 1,405	$ 1,774	$ 273

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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns and from business acquisitions.

+ References

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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