Fair Value Measurements (Details) - USD ($) $ in Millions	Jan. 27, 2019	Oct. 28, 2018
Assets:
Equity investments with readily determinable values	$ 135
Recurring fair value measurements
Assets:
Available-for-sale debt security investments	4,149	$ 3,982
Equity investments with readily determinable values	31	38
Total	4,180	4,020
Recurring fair value measurements \| Money market funds
Assets:
Available-for-sale debt security investments	1,911	1,599
Recurring fair value measurements \| U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	375	333
Recurring fair value measurements \| Non-U.S. government securities
Assets:
Available-for-sale debt security investments	9	10
Recurring fair value measurements \| Municipal securities
Assets:
Available-for-sale debt security investments	401	395
Recurring fair value measurements \| Commercial paper, corporate bonds and medium-term notes
Assets:
Available-for-sale debt security investments	891	1,054
Recurring fair value measurements \| Asset-backed and mortgage-backed securities
Assets:
Available-for-sale debt security investments	562	591
Recurring fair value measurements \| Publicly traded equity securities
Assets:
Equity investments with readily determinable values	31	38
Recurring fair value measurements \| Level 1
Assets:
Available-for-sale debt security investments	2,254	1,896
Equity investments with readily determinable values	31	38
Total	2,285	1,934
Recurring fair value measurements \| Level 1 \| Money market funds
Assets:
Available-for-sale debt security investments	1,911	1,599
Recurring fair value measurements \| Level 1 \| U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	343	297
Recurring fair value measurements \| Level 1 \| Non-U.S. government securities
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements \| Level 1 \| Municipal securities
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements \| Level 1 \| Commercial paper, corporate bonds and medium-term notes
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements \| Level 1 \| Asset-backed and mortgage-backed securities
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements \| Level 1 \| Publicly traded equity securities
Assets:
Equity investments with readily determinable values	31	38
Recurring fair value measurements \| Level 2
Assets:
Available-for-sale debt security investments	1,895	2,086
Equity investments with readily determinable values	0	0
Total	1,895	2,086
Recurring fair value measurements \| Level 2 \| Money market funds
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements \| Level 2 \| U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	32	36
Recurring fair value measurements \| Level 2 \| Non-U.S. government securities
Assets:
Available-for-sale debt security investments	9	10
Recurring fair value measurements \| Level 2 \| Municipal securities
Assets:
Available-for-sale debt security investments	401	395
Recurring fair value measurements \| Level 2 \| Commercial paper, corporate bonds and medium-term notes
Assets:
Available-for-sale debt security investments	891	1,054
Recurring fair value measurements \| Level 2 \| Asset-backed and mortgage-backed securities
Assets:
Available-for-sale debt security investments	562	591
Recurring fair value measurements \| Level 2 \| Publicly traded equity securities
Assets:
Equity investments with readily determinable values	$ 0	$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
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