Quartely Summary (Details) (USD $)	3 Months Ended								12 Months Ended
	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	May 01, 2011	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Selected Quarterly Financial Information [Abstract]
Revenue	$ 1,106,902,000	$ 1,204,110,000	$ 1,044,270,000	$ 924,877,000	$ 953,194,000	$ 1,066,180,000	$ 1,016,517,000	$ 962,039,000	$ 4,280,159,000	$ 3,997,930,000	$ 3,543,309,000
Cost of revenue	521,300,000	567,452,000	503,551,000	461,513,000	463,181,000	509,463,000	491,233,000	477,536,000	2,053,816,000	1,941,413,000	2,134,219,000
Gross profit	585,602,000	636,658,000	540,719,000	463,364,000	490,013,000	556,717,000	525,284,000	484,503,000	2,226,343,000	2,056,517,000	1,409,090,000
Net income	173,973,000	209,080,000	119,046,000	60,437,000	116,025,000	178,273,000	151,573,000	135,219,000	562,536,000	581,090,000	253,146,000
Basic net income per share	$ 0.28	$ 0.34	$ 0.19	$ 0.10	$ 0.19	$ 0.29	$ 0.25	$ 0.23	$ 0.91	$ 0.96	$ 0.44
Diluted net income per share	$ 0.28	$ 0.33	$ 0.19	$ 0.10	$ 0.19	$ 0.29	$ 0.25	$ 0.22	$ 0.90	$ 0.94	$ 0.43
Charitable contribution			25,000,000
Charitable contribution period			10
Litigation Settlement, Expense					$ 7,300,000