Stock-Based Compensation (Tables)

12 Months Ended

Feb. 02, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

A summary of stock option activity under the Stock Incentive Plan and the Option Plan for fiscal 2018 is as follows:

	Options			Weighted-Average Exercise Price
Outstanding—February 3, 2018		8,616,578		$	50.31
Granted		428,350			123.13
Exercised		(882,272	)		49.90
Cancelled		(663,240	)		51.91
Outstanding—February 2, 2019		7,499,416		$	54.37

Schedule of Assumptions Used to Estimate Fair Value of Stock Options Issued

The fair value of stock options issued was estimated on the date of grant using the following assumptions:

	Year Ended
	February 2,			February 3,			January 28,
	2019			2018			2017
Expected volatility		54.7	%		48.3	%		44.9	%
Expected life (years)		6.7			9.3			6.5
Risk-free interest rate		2.9	%		2.2	%		1.4	%
Dividend yield		—			—			—

Summary of Additional Information about Stock Options

A summary of additional information about stock options is as follows:

	Year Ended
	February 2,		February 3,		January 28,
	2019		2018		2017
Weighted-average fair value per share of stock options    granted	$	69.60	$	24.24	$	15.88
Aggregate intrinsic value of stock options exercised (in    thousands)		77,311		27,362		1,238
Fair value of stock options vested (in thousands)		13,915		38,402		13,726

Schedule of Stock Options Outstanding, Vested or Expected to Vest, and Exercisable

Information about stock options outstanding, vested or expected to vest, and exercisable as of February 2, 2019 is as follows:

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number of Options		Weighted- Average Remaining Contractual Life (in years)		Weighted- Average Exercise Price		Number of Options		Weighted- Average Exercise Price
$25.39 - $44.52		1,541,706		6.83	$	34.54		583,526	$	33.17
$45.21 - $45.82		29,540		8.56		45.23		4,140		45.24
$46.50 - $46.50		2,976,826		3.74		46.50		2,976,826		46.50
$47.53 - $61.30		1,331,277		7.58		52.69		1,216,457		51.99
$64.65 - $90.92		1,219,817		4.77		77.54		1,089,780		76.52
$91.69 - $159.00		400,250		8.94		124.97		27,650		93.63
Total		7,499,416		5.52	$	54.37		5,898,379	$	52.08
Vested or expected to vest		6,988,863		5.34	$	52.86

Summary of Restricted Stock Award Activity

A summary of restricted stock award activity for fiscal 2018 is as follows:

	Awards			Weighted- Average Grant Date Fair Value		Intrinsic Value
Outstanding—February 3, 2018		802,713		$	52.65
Granted		12,005			111.38
Released		(194,974	)		58.87
Cancelled		(204,275	)		50.68
Outstanding—February 2, 2019		415,469		$	52.40	$	55,523,277

Summary of Additional Information about Restricted Stock Awards

A summary of additional information about restricted stock awards is as follows:

	Year Ended
	February 2,		February 3,		January 28,
	2019		2018		2017
Weighted-average fair value per share of awards granted	$	111.38	$	55.31	$	40.18
Grant date fair value of awards released (in thousands)		11,477		16,839		5,170