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Quarterly Result (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Feb. 01, 2020
Nov. 02, 2019
Aug. 03, 2019
May 04, 2019
Feb. 02, 2019
Nov. 03, 2018
Aug. 04, 2018
May 05, 2018
Feb. 01, 2020
Feb. 02, 2019
Feb. 03, 2018
Quarterly Financial Information Disclosure [Abstract]                      
Net sales $ 2,201,384 $ 1,774,949 $ 1,656,363 $ 1,628,547 $ 1,991,483 $ 1,634,489 $ 1,498,633 $ 1,518,446 $ 7,261,243 $ 6,643,051 $ 6,084,766
Type of Revenue [Extensible List] us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember
Gross margin [1],[2] $ 927,295 $ 752,037 $ 685,942 $ 667,229 $ 835,529 $ 692,480 $ 621,159 $ 625,764      
Net income $ 206,325 $ 96,459 $ 84,567 $ 77,765 $ 184,351 $ 76,849 $ 70,957 $ 82,588 $ 465,116 $ 414,745 $ 384,852
Net income per share—basic                      
Common stockholders $ 3.14 [3] $ 1.46 [3] $ 1.28 [3] $ 1.18 [3] $ 2.77 [3] $ 1.15 [3] $ 1.06 [3] $ 1.23 [3] $ 7.05 $ 6.21 $ 5.64
Net income per share—diluted                      
Common stockholders $ 3.08 [3] $ 1.44 [3] $ 1.26 [3] $ 1.15 [3] $ 2.70 [3] $ 1.12 [3] $ 1.03 [3] $ 1.20 [3] $ 6.91 $ 6.04 $ 5.48
[1] During the quarterly periods ended February 1, 2020 and February 2, 2019, the Company recorded shortage adjustments of $1.9 million and $1.9 million, respectively, as a result of actual shortage being less than what the Company had estimated throughout the year.
[2] Gross margin is equal to net sales less cost of sales.
[3] Quarterly net income per share results may not equal full year amounts due to rounding.