Earnings Per Share (Computation Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Earnings Per Share [Abstract]
Net earnings	$ 87	$ 63
Basic shares (in shares)	167.8	167.3
Dilutive effect of common stock equivalents (in shares)	2.4	1.8
Diluted shares (in shares)	170.2	169.1
Earnings per basic share (in dollars per share)	$ 0.52	$ 0.38
Earnings per diluted share (in dollars per share)	$ 0.51	$ 0.37
Anti-dilutive common stock equivalents (in shares)	9.6	12.1