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Financial Instruments and Fair Value Measurements - Summary of Investments (Detail) - USD ($) $ in Millions	Jan. 29, 2021	Apr. 24, 2020
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	$ 183	$ 414
Gross unrealized gains	1	1
Gross unrealized losses	0	0
Estimated fair value	184	415
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	68	155
Gross unrealized gains	1	1
Gross unrealized losses	0	0
Estimated fair value	69	156
U.S. Treasury and Government Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	17	68
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	17	68
Certificates of Deposit
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	59	158
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	59	158
Mutual Funds
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	39	33
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	$ 39	$ 33

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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).

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