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Self-Insurance (Summary Of Self-Insurance Reserves) (Details) - USD ($)
$ in Millions
Jan. 28, 2017
Jan. 30, 2016
Self-insurance reserve [Line Items]    
Total self-insurance reserve $ 114 $ 112
Workers' compensation [Member]    
Self-insurance reserve [Line Items]    
Total self-insurance reserve 69 68
Employee health and welfare [Member]    
Self-insurance reserve [Line Items]    
Total self-insurance reserve 29 28
Other liability [Member]    
Self-insurance reserve [Line Items]    
Total self-insurance reserve $ 16 $ 16