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Fair Value Measurements (Financial Assets Measured At Fair Value On A Recurring and Nonrecurring Basis) (Details) - USD ($)
$ in Millions
May 02, 2020
May 04, 2019
Marketable equity and debt securities $ 102 $ 110
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Marketable equity and debt securities 28 31
Significant Observable Inputs (Level 2) [Member]    
Marketable equity and debt securities 74 79
Significant Unobservable Inputs (Level 3) [Member]    
Marketable equity and debt securities $ 0 $ 0