Stock-Based Compensation - Summary of Stock Option Activity (Detail) - 2012 Stock Incentive Plan and 2012 Stock Option Plan [Member] - Stock Options [Member]	12 Months Ended
	Jan. 28, 2017 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options, Outstanding, Beginning balance | shares	6,535,573
Options, Granted | shares	3,062,234
Options, Exercised | shares	(175,585)
Options, Cancelled | shares	(948,563)
Options, Outstanding, Ending balance | shares	8,473,659
Weighted-Average Exercise Price, Outstanding, Beginning balance | $ / shares	$ 55.71
Weighted-Average Exercise Price, Granted | $ / shares	35.82
Weighted-Average Exercise Price, Exercised | $ / shares	28.61
Weighted-Average Exercise Price, Cancelled | $ / shares	56.47
Weighted-Average Exercise Price, Outstanding, Ending balance | $ / shares	$ 49.00