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Available-for-Sale Debt and Equity Investments - Summary of Available-for-Sale Debt Investments (Details) - USD ($) $ in Millions | Oct. 29, 2022 | Jul. 30, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 13,089 | $ 12,467
Gross Unrealized Gains | 0 | 2
Gross Unrealized and Credit Losses | (842) | (522)
Fair Value | 12,247 | 11,947
U.S. government securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,545 | 1,287
Gross Unrealized Gains | 0 | 0
Gross Unrealized and Credit Losses | (70) | (49)
Fair Value | 1,475 | 1,238
U.S. government agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 171 | 142
Gross Unrealized Gains | 0 | 0
Gross Unrealized and Credit Losses | (6) | (4)
Fair Value | 165 | 138
Non-U.S. government and agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 275 | 272
Gross Unrealized Gains | 0 | 0
Gross Unrealized and Credit Losses | (1) | 0
Fair Value | 274 | 272
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 7,808 | 8,127
Gross Unrealized Gains | 0 | 2
Gross Unrealized and Credit Losses | (492) | (311)
Fair Value | 7,316 | 7,818
U.S. agency mortgage-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,071 | 2,134
Gross Unrealized Gains | 0 | 0
Gross Unrealized and Credit Losses | (273) | (158)
Fair Value | 1,798 | 1,976
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 798 | 255
Gross Unrealized Gains | 0 | 0
Gross Unrealized and Credit Losses | 0 | 0
Fair Value | 798 | 255
Certificates of deposit |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 421 | 250
Gross Unrealized Gains | 0 | 0
Gross Unrealized and Credit Losses | 0 | 0
Fair Value | $ 421 | $ 250

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, 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 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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