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Fair Value Measurements (Financial Assets Measured At Fair Value On A Recurring and Nonrecurring Basis) (Details) - USD ($)
$ in Millions
May 01, 2021
May 02, 2020
Marketable equity and debt securities $ 82 $ 102
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Marketable equity and debt securities 38 28
Significant Observable Inputs (Level 2) [Member]    
Marketable equity and debt securities 44 74
Significant Unobservable Inputs (Level 3) [Member]    
Marketable equity and debt securities $ 0 $ 0