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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. 28, 2017
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares, Options outstanding expected to vest | shares 7,747
Shares, Options exercisable | shares 18,980
Shares, Total outstanding options vested and expected to vest | shares 26,727
Aggregate Intrinsic Value, Options outstanding expected to vest | $ $ 24,974
Aggregate Intrinsic Value, Options exercisable | $ 675,109
Aggregate Intrinsic Value, Total outstanding options vested and expected to vest | $ $ 700,083
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
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 $ 71.42
WAEP, Options exercisable | $ / shares 38.69
WAEP, Total outstanding options vested and expected to vest | $ / shares $ 48.18