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Financial Instruments and Fair Value Measurements - Summary of Investments at Cost or Amortized Cost (Detail) - USD ($) $ in Millions | Jul. 25, 2025 | Apr. 25, 2025
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Cost or amortized cost | $ 2,739 | $ 3,216
U.S. Treasury and Government Debt Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost or amortized cost | 1,239 | 2,025
Money Market Funds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost or amortized cost | 1,419 | 1,126
Certificates of Deposit |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost or amortized cost | 33 | 24
Mutual Funds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost or amortized cost | $ 48 | $ 41

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