Fair Value Measurements - Financial Assets Measured At Fair Value On A Recurring and Nonrecurring Basis (Details) - USD ($) $ in Millions |
Jul. 29, 2023 |
Jul. 30, 2022 |
|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Marketable equity and debt securities | $ 39 | $ 34 |
| Level 1 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Marketable equity and debt securities | 39 | 34 |
| Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Marketable equity and debt securities | 0 | 0 |
| Level 3 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Marketable equity and debt securities | $ 0 | $ 0 |