Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements and Concentrations of Credit Risk (Financial Assets Measured At Fair Value On A Recurring Basis) (Details)

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Fair Value Measurements and Concentrations of Credit Risk (Financial Assets Measured At Fair Value On A Recurring Basis) (Details) - USD ($)
$ in Millions
Feb. 02, 2019
Feb. 03, 2018
Marketable equity and debt securities $ 101 $ 117
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Marketable equity and debt securities 27 25
Significant Observable Inputs (Level 2) [Member]    
Marketable equity and debt securities 74 92
Significant Unobservable Inputs (Level 3) [Member]    
Marketable equity and debt securities $ 0 $ 0