Financial Instruments and Fair Value Measurements - Summary of Investments (Detail) - USD ($) $ in Millions	Oct. 30, 2020	Apr. 24, 2020
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	$ 258	$ 414
Gross unrealized gains	2	1
Gross unrealized losses	0	0
Estimated fair value	260	415
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	99	155
Gross unrealized gains	2	1
Gross unrealized losses	0	0
Estimated fair value	101	156
U.S. Treasury and Government Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	16	68
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	16	68
Certificates of Deposit
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	106	158
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	106	158
Mutual Funds
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	37	33
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	$ 37	$ 33

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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