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Schedule Of Stock Options Outstanding Expected To Vest And Stock Options Outstanding Exercisable (Detail)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Jan. 30, 2016
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares, Options outstanding expected to vest | shares 7,862
Shares, Options exercisable | shares 20,175
Shares, Total outstanding options vested and expected to vest | shares 28,037
Aggregate Intrinsic Value, Options outstanding expected to vest | $ $ 51,648
Aggregate Intrinsic Value, Options exercisable | $ 796,741
Aggregate Intrinsic Value, Total outstanding options vested and expected to vest | $ $ 848,389
Weighted Average Remaining Contract Life, Options outstanding expected to vest, years 8 years 10 months 24 days
Weighted Average Remaining Contract Life, Options exercisable, years 5 years 1 month 6 days
Weighted Average Remaining Contract Life, Total outstanding options vested and expected to vest, years 6 years 2 months 12 days
WAEP, Options outstanding expected to vest | $ / shares $ 65.29
WAEP, Options exercisable | $ / shares 31.75
WAEP, Total outstanding options vested and expected to vest | $ / shares $ 41.15