Fair Value Measurements and Concentrations of Credit Risk (Financial Assets Measured At Fair Value On A Recurring and Nonrecurring Basis) (Details) - USD ($) $ in Millions	Jan. 30, 2021	Feb. 01, 2020
Marketable equity and debt securities	$ 100	$ 132
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Marketable equity and debt securities	37	34
Significant Observable Inputs (Level 2) [Member]
Marketable equity and debt securities	63	98
Significant Unobservable Inputs (Level 3) [Member]
Marketable equity and debt securities	$ 0	$ 0