Fair Value Measurements (Financial Assets Measured At Fair Value On A Recurring and Nonrecurring Basis) (Details) - USD ($) $ in Millions |
Apr. 30, 2022 |
May 01, 2021 |
|---|---|---|
| Marketable equity and debt securities | $ 35 | $ 82 |
| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | ||
| Marketable equity and debt securities | 35 | 38 |
| Significant Observable Inputs (Level 2) [Member] | ||
| Marketable equity and debt securities | 0 | 44 |
| Significant Unobservable Inputs (Level 3) [Member] | ||
| Marketable equity and debt securities | $ 0 | $ 0 |