Earnings Per Share And Shareholders' Equity (Schedule of Company's Repurchase Program) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	9 Months Ended
	Nov. 03, 2018	Oct. 28, 2017	May 05, 2018	Feb. 03, 2018	Apr. 29, 2017	Apr. 30, 2016
Shares Repurchased	5,379	6,486
Amount Repurchased	$ 196.0	$ 282.0
March 2018 Repurchase Program [Member]
Amount Authorized			$ 250.0
Shares Repurchased	4,852
Amount Repurchased	$ 171.0
Average Stock Price of Shares Repurchased within Program	$ 35.29
Remaining authorized repurchase amount	$ 79.0
September 2017 Repurchase Program [Member]
Amount Authorized		$ 250.0
Shares Repurchased	527	935
Amount Repurchased	$ 25.0	$ 39.0
Average Stock Price of Shares Repurchased within Program	$ 46.98	$ 41.30
Remaining authorized repurchase amount			$ 23.0
February 2017 Repurchase Program [Member]
Amount Authorized					$ 250.0
Shares Repurchased		5,500
Amount Repurchased		$ 240.0
Average Stock Price of Shares Repurchased within Program		$ 43.57
Remaining authorized repurchase amount		$ 10.0
February 2016 Repurchase Program [Member]
Amount Authorized						$ 500.0
Shares Repurchased		51
Amount Repurchased		$ 3.0
Average Stock Price of Shares Repurchased within Program		$ 58.95
Remaining authorized repurchase amount					$ 59.0
June 2015 Repurchase Program [Member]
Remaining authorized repurchase amount						$ 17.0
Accounts Payable [Member] | September 2017 Repurchase Program [Member]
Share repurchase reflected in Accounts payable		$ 2.0		$ 2.0