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Investments - Cumulative Adjustments (Details) - USD ($) $ in Millions | Jul. 26, 2025 | Jul. 27, 2024
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Investments, Debt and Equity Securities [Abstract] |  |
Cumulative upward adjustments | $ 195 | $ 207
Cumulative downward adjustments, including impairments | (597) | (537)
Net adjustments | $ (402) | $ (330)

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- Definition Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment Including Impairment Loss, Cumulative Amount + References No definition available. + Details
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- Definition Equity Securities without Readily Determinable Fair Value, Net Price Adjustment, Cumulative Amount + References No definition available. + Details
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- Definition Amount of cumulative gain from upward price adjustment on investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-3 + Details
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