Fair Value Measurements (Summary Of Carrying Value And Fair Value Estimate Of Long-Term Debt) (Details) - USD ($) $ in Millions	Aug. 03, 2019	Feb. 02, 2019	Aug. 04, 2018
Fair Value Measurements, Long-term Debt [Line Items]
Carrying value of long-term debt	$ 2,678	$ 2,685	$ 2,734
Level 2 [Member]
Fair Value Measurements, Long-term Debt [Line Items]
Fair value of long-term debt	$ 2,782	$ 2,692	$ 2,797