Taxes on Earnings (Provision For Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Current
Federal									$ 632,872	$ 497,710	$ 499,009
State									44,333	37,030	36,547
Current income taxes									677,205	534,740	535,556
Deferred
Federal									(8,350)	55,404	23,452
State									(353)	954	1,634
Deferred income taxes									(8,703)	56,358	25,086
Total	$ 172,470	$ 141,722	$ 173,442	$ 180,868	$ 144,567	$ 116,071	$ 153,273	$ 177,187	$ 668,502	$ 591,098	$ 560,642