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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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 (Details) - USD ($) $ in Millions	Jan. 31, 2021	Oct. 25, 2020	Jan. 26, 2020
Equity investments with readily determinable values
Equity investments with readily determinable values	$ 202	$ 184
Restricted cash equivalents included in deferred income taxes and other assets	115		$ 0
Money market funds \| Deferred Income Taxes and Other Assets, Net
Equity investments with readily determinable values
Restricted cash equivalents included in deferred income taxes and other assets	115	115
Bank certificate of deposit
Assets:
Available-for-sale debt security investments	2
U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	334	398
Municipal securities
Assets:
Available-for-sale debt security investments	360	365
Commercial paper, corporate bonds and medium-term notes
Assets:
Available-for-sale debt security investments	559	499
Asset-backed and mortgage-backed securities
Assets:
Available-for-sale debt security investments	548	479
Publicly traded equity securities
Equity investments with readily determinable values
Equity investments with readily determinable values	53	45
Recurring fair value measurements
Assets:
Available-for-sale debt security investments	6,987	6,071
Equity investments with readily determinable values
Equity investments with readily determinable values	53	45
Total	7,040	6,116
Recurring fair value measurements \| Money market funds
Assets:
Available-for-sale debt security investments	5,153	4,324
Recurring fair value measurements \| Bank certificate of deposit
Assets:
Available-for-sale debt security investments	2	0
Recurring fair value measurements \| U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	334	398
Recurring fair value measurements \| Non-U.S. government securities
Assets:
Available-for-sale debt security investments	6	0
Recurring fair value measurements \| Municipal securities
Assets:
Available-for-sale debt security investments	375	371
Recurring fair value measurements \| Commercial paper, corporate bonds and medium-term notes
Assets:
Available-for-sale debt security investments	569	499
Recurring fair value measurements \| Asset-backed and mortgage-backed securities
Assets:
Available-for-sale debt security investments	548	479
Recurring fair value measurements \| Publicly traded equity securities
Equity investments with readily determinable values
Equity investments with readily determinable values	53	45
Recurring fair value measurements \| Level 1
Assets:
Available-for-sale debt security investments	5,461	4,699
Equity investments with readily determinable values
Equity investments with readily determinable values	53	45
Total	5,514	4,744
Recurring fair value measurements \| Level 1 \| Money market funds
Assets:
Available-for-sale debt security investments	5,153	4,324
Recurring fair value measurements \| Level 1 \| Bank certificate of deposit
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements \| Level 1 \| U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	308	375
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
Equity investments with readily determinable values
Equity investments with readily determinable values	53	45
Recurring fair value measurements \| Level 2
Assets:
Available-for-sale debt security investments	1,526	1,372
Equity investments with readily determinable values
Equity investments with readily determinable values	0	0
Total	1,526	1,372
Recurring fair value measurements \| Level 2 \| Money market funds
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements \| Level 2 \| Bank certificate of deposit
Assets:
Available-for-sale debt security investments	2	0
Recurring fair value measurements \| Level 2 \| U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	26	23
Recurring fair value measurements \| Level 2 \| Non-U.S. government securities
Assets:
Available-for-sale debt security investments	6	0
Recurring fair value measurements \| Level 2 \| Municipal securities
Assets:
Available-for-sale debt security investments	375	371
Recurring fair value measurements \| Level 2 \| Commercial paper, corporate bonds and medium-term notes
Assets:
Available-for-sale debt security investments	569	499
Recurring fair value measurements \| Level 2 \| Asset-backed and mortgage-backed securities
Assets:
Available-for-sale debt security investments	548	479
Recurring fair value measurements \| Level 2 \| Publicly traded equity securities
Equity investments with readily determinable values
Equity investments with readily determinable values	$ 0	$ 0