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Fair Value Measurements (Summary Of Carrying Value And Fair Value Estimate Of Long-Term Debt, Including Current Maturities) (Details) - USD ($)
$ in Millions
Jan. 30, 2021
Feb. 01, 2020
Fair Value Measurements, Long-term Debt [Line Items]    
Carrying value of long-term debt $ 3,269 $ 2,676
Level 2 [Member]    
Fair Value Measurements, Long-term Debt [Line Items]    
Fair value of long-term debt $ 3,430 $ 2,905