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Fair Value Measurements (Carrying Value and Estimated Fair Value of Long-Term Debt) (Details) - USD ($)
$ in Millions
Aug. 01, 2020
Feb. 01, 2020
Aug. 03, 2019
Fair Value Measurements [Abstract]      
Long-term debt, Carrying value $ 121 $ 122 $ 123
Long-term debt, Fair value $ 129 $ 135 $ 136