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Available-for-Sale Debt and Equity Investments - Available-for-Sale Investments With Gross Unrealized Losses (Details) - USD ($) $ in Millions | Oct. 29, 2022 | Jul. 30, 2022
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Debt Securities, Available-for-sale [Line Items] |  |
UNREALIZED LOSSES LESS THAN 12 MONTHS, Fair Value | $ 6,649 | $ 9,713
UNREALIZED LOSSES LESS THAN 12 MONTHS, Gross Unrealized Losses | (343) | (382)
UNREALIZED LOSSES 12 MONTHS OR GREATER, Fair Value | 4,234 | 1,181
UNREALIZED LOSSES 12 MONTHS OR GREATER, Gross Unrealized Losses | (465) | (106)
TOTAL, Fair Value | 10,883 | 10,894
TOTAL, Gross Unrealized Losses | (808) | (488)
U.S. government securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
UNREALIZED LOSSES LESS THAN 12 MONTHS, Fair Value | 530 | 1,110
UNREALIZED LOSSES LESS THAN 12 MONTHS, Gross Unrealized Losses | (12) | (44)
UNREALIZED LOSSES 12 MONTHS OR GREATER, Fair Value | 944 | 120
UNREALIZED LOSSES 12 MONTHS OR GREATER, Gross Unrealized Losses | (58) | (5)
TOTAL, Fair Value | 1,474 | 1,230
TOTAL, Gross Unrealized Losses | (70) | (49)
U.S. government agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
UNREALIZED LOSSES LESS THAN 12 MONTHS, Fair Value | 101 | 114
UNREALIZED LOSSES LESS THAN 12 MONTHS, Gross Unrealized Losses | (2) | (2)
UNREALIZED LOSSES 12 MONTHS OR GREATER, Fair Value | 64 | 24
UNREALIZED LOSSES 12 MONTHS OR GREATER, Gross Unrealized Losses | (4) | (2)
TOTAL, Fair Value | 165 | 138
TOTAL, Gross Unrealized Losses | (6) | (4)
Non-U.S. government and agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
UNREALIZED LOSSES LESS THAN 12 MONTHS, Fair Value | 257 | 264
UNREALIZED LOSSES LESS THAN 12 MONTHS, Gross Unrealized Losses | (1) | 0
UNREALIZED LOSSES 12 MONTHS OR GREATER, Fair Value | 0 | 0
UNREALIZED LOSSES 12 MONTHS OR GREATER, Gross Unrealized Losses | 0 | 0
TOTAL, Fair Value | 257 | 264
TOTAL, Gross Unrealized Losses | (1) | 0
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
UNREALIZED LOSSES LESS THAN 12 MONTHS, Fair Value | 5,065 | 6,920
UNREALIZED LOSSES LESS THAN 12 MONTHS, Gross Unrealized Losses | (252) | (240)
UNREALIZED LOSSES 12 MONTHS OR GREATER, Fair Value | 2,090 | 422
UNREALIZED LOSSES 12 MONTHS OR GREATER, Gross Unrealized Losses | (206) | (37)
TOTAL, Fair Value | 7,155 | 7,342
TOTAL, Gross Unrealized Losses | (458) | (277)
U.S. agency mortgage-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
UNREALIZED LOSSES LESS THAN 12 MONTHS, Fair Value | 651 | 1,305
UNREALIZED LOSSES LESS THAN 12 MONTHS, Gross Unrealized Losses | (76) | (96)
UNREALIZED LOSSES 12 MONTHS OR GREATER, Fair Value | 1,136 | 615
UNREALIZED LOSSES 12 MONTHS OR GREATER, Gross Unrealized Losses | (197) | (62)
TOTAL, Fair Value | 1,787 | 1,920
TOTAL, Gross Unrealized Losses | (273) | $ (158)
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
UNREALIZED LOSSES LESS THAN 12 MONTHS, Fair Value | 45 |
UNREALIZED LOSSES LESS THAN 12 MONTHS, Gross Unrealized Losses | 0 |
UNREALIZED LOSSES 12 MONTHS OR GREATER, Fair Value | 0 |
UNREALIZED LOSSES 12 MONTHS OR GREATER, Gross Unrealized Losses | 0 |
TOTAL, Fair Value | 45 |
TOTAL, Gross Unrealized Losses | $ 0 |

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