Share-Based Compensation (Changes in Nonvested Options) (Details) - Restricted Stock and Units [Member] $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	May 05, 2018 USD ($) $ / shares shares
Number of Shares
Nonvested, Beginning Balance | shares	374
Granted | shares	635	[1]
Vested | shares	(80)
Cancelled | shares	(46)	[2]
Nonvested, Ending Balance | shares	883
Aggregate value | $	$ 44
Wtg. Avg. remaining contractual life (in years)	2 years 6 months
Weighted-Average Grant Date Fair Value per Share
Nonvested, Beginning Balance | $ / shares	$ 59.15
Granted | $ / shares	47.31	[1]
Vested | $ / shares	62.78
Cancelled | $ / shares	60.55	[2]
Nonvested, Ending Balance | $ / shares	$ 50.22

[1] Approximately 0.4 million performance-based RSUs were granted during the first quarter of 2018 and are included as granted in the table above. The number of performance-based RSUs that are ultimately earned may vary from 0% to 200% of target depending on the achievement relative to the Company's predefined financial performance targets

[2] Adjustments were made to performance-based RSUs previously granted and are included as cancelled in the table above. These adjustments reflect changes in estimates based upon the Company's current performance against predefined financial targets