Financial Instruments - Investments by Category and Related Balance Sheet Classification (Details) - USD ($) $ in Millions	Apr. 26, 2024	Apr. 28, 2023
Schedule of Investments [Line Items]
Cost	$ 6,968	$ 6,748
Unrealized Gains	7	6
Unrealized Losses	(252)	(305)
Fair Value	6,723	6,449
Investments
Schedule of Investments [Line Items]
Fair Value	6,690	6,416
Other Assets
Schedule of Investments [Line Items]
Fair Value	33	33
Level 1 | U.S. government and agency securities
Schedule of Investments [Line Items]
Cost	494	527
Unrealized Gains	0	0
Unrealized Losses	(22)	(22)
Fair Value	472	505
Level 1 | U.S. government and agency securities | Investments
Schedule of Investments [Line Items]
Fair Value	472	505
Level 1 | U.S. government and agency securities | Other Assets
Schedule of Investments [Line Items]
Fair Value	0	0
Level 2
Schedule of Investments [Line Items]
Cost	6,438	6,185
Unrealized Gains	7	6
Unrealized Losses	(227)	(281)
Fair Value	6,218	5,911
Level 2 | Investments
Schedule of Investments [Line Items]
Fair Value	6,218	5,911
Level 2 | Other Assets
Schedule of Investments [Line Items]
Fair Value	0	0
Level 2 | U.S. government and agency securities
Schedule of Investments [Line Items]
Cost	847	879
Unrealized Gains	0	0
Unrealized Losses	(43)	(45)
Fair Value	804	834
Level 2 | U.S. government and agency securities | Investments
Schedule of Investments [Line Items]
Fair Value	804	834
Level 2 | U.S. government and agency securities | Other Assets
Schedule of Investments [Line Items]
Fair Value	0	0
Level 2 | Corporate debt securities
Schedule of Investments [Line Items]
Cost	3,953	4,140
Unrealized Gains	4	6
Unrealized Losses	(125)	(162)
Fair Value	3,832	3,984
Level 2 | Corporate debt securities | Investments
Schedule of Investments [Line Items]
Fair Value	3,832	3,984
Level 2 | Corporate debt securities | Other Assets
Schedule of Investments [Line Items]
Fair Value	0	0
Level 2 | Mortgage-backed securities
Schedule of Investments [Line Items]
Cost	692	560
Unrealized Gains	1	0
Unrealized Losses	(50)	(54)
Fair Value	643	506
Level 2 | Mortgage-backed securities | Investments
Schedule of Investments [Line Items]
Fair Value	643	506
Level 2 | Mortgage-backed securities | Other Assets
Schedule of Investments [Line Items]
Fair Value	0	0
Level 2 | Non-U.S. government and agency securities
Schedule of Investments [Line Items]
Cost	5	15
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	5	15
Level 2 | Non-U.S. government and agency securities | Investments
Schedule of Investments [Line Items]
Fair Value	5	15
Level 2 | Non-U.S. government and agency securities | Other Assets
Schedule of Investments [Line Items]
Fair Value	0	0
Level 2 | Certificates of deposit
Schedule of Investments [Line Items]
Cost		10
Unrealized Gains		0
Unrealized Losses		0
Fair Value		10
Level 2 | Certificates of deposit | Investments
Schedule of Investments [Line Items]
Fair Value		10
Level 2 | Certificates of deposit | Other Assets
Schedule of Investments [Line Items]
Fair Value
Level 2 | Other asset-backed securities
Schedule of Investments [Line Items]
Cost	941	580
Unrealized Gains	2	0
Unrealized Losses	(9)	(19)
Fair Value	934	561
Level 2 | Other asset-backed securities | Investments
Schedule of Investments [Line Items]
Fair Value	934	561
Level 2 | Other asset-backed securities | Other Assets
Schedule of Investments [Line Items]
Fair Value	0	0
Level 3 | Auction rate securities
Schedule of Investments [Line Items]
Cost	36	36
Unrealized Gains	0	0
Unrealized Losses	(3)	(3)
Fair Value	33	33
Level 3 | Auction rate securities | Investments
Schedule of Investments [Line Items]
Fair Value	0	0
Level 3 | Auction rate securities | Other Assets
Schedule of Investments [Line Items]
Fair Value	$ 33	$ 33