Quarterly Financial Data (Unaudited) (Details) (USD $)	3 Months Ended																12 Months Ended
	Feb. 02, 2013		Oct. 27, 2012		Jul. 28, 2012		Apr. 28, 2012		Jan. 28, 2012		Oct. 29, 2011		Jul. 30, 2011		Apr. 30, 2011		Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Quarterly Financial Data [Abstract]
Net sales	$ 1,468,531,000		$ 1,169,649,000		$ 951,407,000		$ 921,218,000		$ 1,328,766,000		$ 1,075,856,000		$ 916,763,000		$ 836,674,000		$ 4,510,805,000	$ 4,158,058,000	$ 3,468,777,000
Gross profit	930,652,000		752,514,000	[1],[2]	592,451,000	[1],[3]	541,092,000	[1],[4]	789,970,000	[1],[5]	656,254,000	[1],[6]	578,465,000	[1],[7]	525,536,000	[1],[8]	2,816,709,000	2,550,224,000	2,217,429,000
Net income (loss)	157,229,000	[9]	84,036,000	[1],[2]	17,051,000	[1],[3]	(21,305,000)	[1],[4]	45,825,000	[1],[5]	56,992,000	[1],[6]	28,119,000	[1],[7]	12,998,000	[1],[8]	237,011,000	143,934,000	155,709,000
Net income (loss) per diluted share (in dollars per share)	$ 1.95	[10]	$ 1.02	[1],[2]	$ 0.20	[1],[3]	$ (0.25)	[1],[4]	$ 0.52	[1],[5]	$ 0.64	[1],[6]	$ 0.31	[1],[7]	$ 0.14	[1],[8]	$ 2.85	$ 1.61	$ 1.73
Change in accounting principle, effect of change on gross profit			20,900,000		(2,000,000)		(35,300,000)		44,300,000		9,700,000		(4,600,000)		(18,100,000)
Change in accounting principle, effect of change on net income			12,500,000		1,500,000		(24,300,000)		26,200,000		6,100,000		(3,900,000)		(12,100,000)
Change in accounting principle, effect of change on diluted earnings per share (in dollars per share)			$ 0.15		$ 0.01		$ (0.28)		$ 0.30		$ 0.07		$ (0.04)		$ (0.14)
Impairment charges per share (in dollars per share)	$ 0.06								$ 0.50
Asset write down charges per share									$ 0.10
Store closure charges per share									$ 0.13
Legal charges per share									$ 0.07
ARS charges per share									$ 0.10
Income tax expense, correction of 2011 understated tax expense	$ 1,100,000

[1] Results reported above have been restated to reflect the change in method of accounting for inventory effective in the fourth quarter of Fiscal 2012. Refer to Note 4, “CHANGE IN ACCOUNTING PRINCIPLE,” for further discussion.

[2] For the third quarter of Fiscal 2012, the change in accounting principle increased gross profit by $20.9 million, increased net income by $12.5 million and increased net income per diluted share by $0.15.

[3] For the second quarter of Fiscal 2012, the change in accounting principle decreased gross profit by $2.0 million, increased net income by $1.5 million and increased net income per diluted share by $0.01.

[4] For the first quarter of Fiscal 2012, the change in accounting principle decreased gross profit by $35.3 million, decreased net income by $24.3 million and decreased net income per diluted share by $0.28.

[5] For the fourth quarter of Fiscal 2011, the change in accounting principle increased gross profit by $44.3 million, increased net income by $26.2 million and increased net income per diluted share by $0.30. Additionally, the fourth quarter of Fiscal 2011 includes impairment charges of $0.50 per diluted share, asset write down charges of $0.10 per diluted share, store closure and lease exit charges of $0.13 per diluted share, legal charges of $0.07 per diluted share, and charges related to a change in intent with regarding the Company’s ARS portfolio of $0.10 per diluted share.

[6] For the third quarter of Fiscal 2011, the change in accounting principle increased gross profit by $9.7 million, increased net income by $6.1 million and increased net income per diluted share by $0.07.

[7] For the second quarter of Fiscal 2011, the change in accounting principle decreased gross profit by $4.6 million, decreased net income by $3.9 million and decreased net income per diluted share by $0.04

[8] For the first quarter of Fiscal 2011, the change in accounting principle decreased gross profit by $18.1 million, decreased net income by $12.1 million and decreased net income per diluted share by $0.14.

[9] Tax expense for the fourteen weeks ended February 2, 2013 included $1.1 million to correct for understated tax expense relating to the fourth quarter of 2011. Additionally, the fourth quarter included certain other corrections related to the first three quarters of 2012 that have an immaterial effect on the fourth quarter. The Company does not believe these corrections were material to any current or prior interim or annual periods that were affected.

[10] The fourth quarter of Fiscal 2012 includes impairment charges of $0.06 per diluted share.