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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).

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Amount of cash equivalents restricted as to withdrawal or usage. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair Value Measurements (Assets Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Oct. 25, 2020	Oct. 27, 2019	Oct. 28, 2018
Assets:
Estimated fair value of fixed income securities	$ 6,071	$ 4,093
Equity investments with readily determinable values
Equity investments, fair value	184	157
Restricted cash equivalents included in deferred income taxes and other assets	115	0	$ 0
Money market funds \| Deferred Income Taxes and Other Assets, Net [Member]
Equity investments with readily determinable values
Restricted cash equivalents included in deferred income taxes and other assets	115
U.S. Treasury and agency securities
Assets:
Estimated fair value of fixed income securities	398	337
Municipal securities
Assets:
Estimated fair value of fixed income securities	365	406
Commercial paper, corporate bonds and medium-term notes
Assets:
Estimated fair value of fixed income securities	499	647
Asset-backed and mortgage-backed securities
Assets:
Estimated fair value of fixed income securities	479	635
Publicly traded equity securities
Equity investments with readily determinable values
Equity investments, fair value	45	45
Fair Value, Measurements, Recurring
Equity investments with readily determinable values
Equity investments, fair value	45	45
Assets, fair value disclosure	6,116	4,138
Fair Value, Measurements, Recurring \| Money market funds
Assets:
Estimated fair value of fixed income securities	4,324	1,677
Fair Value, Measurements, Recurring \| U.S. Treasury and agency securities
Assets:
Estimated fair value of fixed income securities	398	341
Fair Value, Measurements, Recurring \| Non-U.S. government securities
Assets:
Estimated fair value of fixed income securities	0	10
Fair Value, Measurements, Recurring \| Municipal securities
Assets:
Estimated fair value of fixed income securities	371	406
Fair Value, Measurements, Recurring \| Commercial paper, corporate bonds and medium-term notes
Assets:
Estimated fair value of fixed income securities	499	1,024
Fair Value, Measurements, Recurring \| Asset-backed and mortgage-backed securities
Assets:
Estimated fair value of fixed income securities	479	635
Fair Value, Measurements, Recurring \| Publicly traded equity securities
Equity investments with readily determinable values
Equity investments, fair value	45	45
Fair Value, Measurements, Recurring \| Level 1
Assets:
Estimated fair value of fixed income securities	4,699	2,000
Equity investments with readily determinable values
Equity investments, fair value	45	45
Assets, fair value disclosure	4,744	2,045
Fair Value, Measurements, Recurring \| Level 1 \| Money market funds
Assets:
Estimated fair value of fixed income securities	4,324	1,677
Fair Value, Measurements, Recurring \| Level 1 \| U.S. Treasury and agency securities
Assets:
Estimated fair value of fixed income securities	375	323
Fair Value, Measurements, Recurring \| Level 1 \| Non-U.S. government securities
Assets:
Estimated fair value of fixed income securities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Municipal securities
Assets:
Estimated fair value of fixed income securities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Commercial paper, corporate bonds and medium-term notes
Assets:
Estimated fair value of fixed income securities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Asset-backed and mortgage-backed securities
Assets:
Estimated fair value of fixed income securities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Publicly traded equity securities
Equity investments with readily determinable values
Equity investments, fair value	45	45
Fair Value, Measurements, Recurring \| Level 2
Assets:
Estimated fair value of fixed income securities	1,372	2,093
Equity investments with readily determinable values
Equity investments, fair value	0	0
Assets, fair value disclosure	1,372	2,093
Fair Value, Measurements, Recurring \| Level 2 \| Money market funds
Assets:
Estimated fair value of fixed income securities	0	0
Fair Value, Measurements, Recurring \| Level 2 \| U.S. Treasury and agency securities
Assets:
Estimated fair value of fixed income securities	23	18
Fair Value, Measurements, Recurring \| Level 2 \| Non-U.S. government securities
Assets:
Estimated fair value of fixed income securities	0	10
Fair Value, Measurements, Recurring \| Level 2 \| Municipal securities
Assets:
Estimated fair value of fixed income securities	371	406
Fair Value, Measurements, Recurring \| Level 2 \| Commercial paper, corporate bonds and medium-term notes
Assets:
Estimated fair value of fixed income securities	499	1,024
Fair Value, Measurements, Recurring \| Level 2 \| Asset-backed and mortgage-backed securities
Assets:
Estimated fair value of fixed income securities	479	635
Fair Value, Measurements, Recurring \| Level 2 \| Publicly traded equity securities
Equity investments with readily determinable values
Equity investments, fair value	$ 0	$ 0