Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Financial Assets Measured At Fair Value On A Recurring and Nonrecurring Basis) (Details)

v3.19.2
Fair Value Measurements (Financial Assets Measured At Fair Value On A Recurring and Nonrecurring Basis) (Details) - USD ($)
$ in Millions
Aug. 03, 2019
Aug. 04, 2018
Marketable equity and debt securities $ 112 $ 96
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Marketable equity and debt securities 31 27
Significant Observable Inputs (Level 2) [Member]    
Marketable equity and debt securities 81 69
Significant Unobservable Inputs (Level 3) [Member]    
Marketable equity and debt securities $ 0 $ 0