Consolidated Statements of Stockholders' Equity Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Beginning balance (in shares) at Feb. 01, 2014		426,840
Beginning balance, value at Feb. 01, 2014	$ 2,007,302	$ 4,268	$ 933,457	$ (121,559)	$ 389	$ 1,190,747
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	924,724					924,724
Unrealized investment loss, net	(59)				(59)
Common stock issued under stock plans, net of shares used for tax withholding (in shares)		2,904
Common stock issued under stock plans, net of shares used for tax withholding, value	(17,063)	$ 29	21,949	(39,041)
Tax benefit from equity issuance	29,759		29,759
Stock-based compensation	$ 53,001		53,001
Common stock repurchased (in shares)	(14,800)	(14,805)
Common stock repurchased	$ (550,000)	$ (148)	(24,559)			(525,293)
Dividends declared	(168,454)					(168,454)
Ending balance (in shares) at Jan. 31, 2015		414,939
Ending balance, value at Jan. 31, 2015	2,279,210	$ 4,149	1,013,607	(160,600)	330	1,421,724
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	1,020,661					1,020,661
Unrealized investment loss, net	(148)				(148)
Common stock issued under stock plans, net of shares used for tax withholding (in shares)		1,053
Common stock issued under stock plans, net of shares used for tax withholding, value	(48,739)	$ 11	20,175	(68,925)
Tax benefit from equity issuance	42,382		42,382
Stock-based compensation	$ 70,937		70,937
Common stock repurchased (in shares)	(13,700)	(13,653)
Common stock repurchased	$ (700,000)	$ (137)	(24,772)			(675,091)
Dividends declared	(192,312)					(192,312)
Ending balance (in shares) at Jan. 30, 2016		402,339
Ending balance, value at Jan. 30, 2016	2,471,991	$ 4,023	1,122,329	(229,525)	182	1,574,982
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	1,117,654					1,117,654
Unrealized investment loss, net	(91)				(91)
Common stock issued under stock plans, net of shares used for tax withholding (in shares)		1,192
Common stock issued under stock plans, net of shares used for tax withholding, value	(24,782)	$ 12	18,527	(43,321)
Tax benefit from equity issuance	23,331		23,331
Stock-based compensation	$ 74,554		74,554
Common stock repurchased (in shares)	(11,638)	(11,638)
Common stock repurchased	$ (700,000)	$ (116)	(23,026)			(676,858)
Dividends declared	(214,640)					(214,640)
Ending balance (in shares) at Jan. 28, 2017		391,893
Ending balance, value at Jan. 28, 2017	$ 2,748,017	$ 3,919	$ 1,215,715	$ (272,846)	$ 91	$ 1,801,138