Fair Value Measurements (Summary Of Carrying Value And Fair Value Estimate Of Long-Term Debt) (Details) - USD ($) $ in Millions	Aug. 01, 2020	Feb. 01, 2020	Aug. 03, 2019
Fair Value Measurements, Long-term Debt [Line Items]
Carrying value of long-term debt	$ 3,266	$ 2,676	$ 2,678
Level 2 [Member]
Fair Value Measurements, Long-term Debt [Line Items]
Fair value of long-term debt	$ 2,922	$ 2,905	$ 2,782