Earnings Per Share (Computation Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	May 02, 2020	May 04, 2019
Earnings Per Share [Abstract]
Net (loss) earnings	$ (521)	$ 37
Basic shares (in shares)	156.4	155.0
Dilutive effect of common stock equivalents (in shares)	0.0	1.2
Diluted shares (in shares)	156.4	156.2
(Loss) earnings per basic share (in dollars per share)	$ (3.33)	$ 0.24
(Loss) earnings per diluted share (in dollars per share)	$ (3.33)	$ 0.23
Anti-dilutive common stock equivalents (in shares)	13.1	9.3