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Selected Quarterly Consolidated Financial Data (Detail) - USD ($)
$ / shares in Units, $ 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
Quarterly Financial Information [Line Items]                      
Net sales $ 9,467,647 $ 8,291,688 $ 7,882,053 $ 7,542,356 $ 8,962,075 $ 7,753,495 $ 7,363,731 $ 6,865,637 $ 33,183,744 $ 30,944,938 $ 29,078,407
Gross earnings [1] 2,680,870 2,447,815 2,319,092 2,170,213 2,573,883 2,246,596 2,144,540 1,945,396      
Net income $ 677,928 $ 549,786 $ 562,174 $ 508,346 $ 666,466 $ 587,256 $ 549,335 $ 474,601 $ 2,298,234 $ 2,277,658 $ 2,215,128
Basic earnings per share $ 1.04 $ 0.84 $ 0.85 $ 0.77 $ 1.00 $ 0.88 $ 0.81 $ 0.70 $ 3.51 $ 3.38 $ 3.20
Diluted earnings per share $ 1.03 $ 0.83 $ 0.84 $ 0.76 $ 0.99 $ 0.86 $ 0.80 $ 0.69 $ 3.46 $ 3.33 $ 3.15
[1] Gross earnings equal net sales less cost of sales, including buying and occupancy costs.