Stock Based Compensation (Tables)



	Three Months Ended				Nine Months Ended
	October 30, 2016		October 25, 2015		October 30, 2016		October 25, 2015
	(In millions)
Cost of revenue	$	2	$	4	$	10	$	10
Research and development	36		28		95		82
Sales, general and administrative	27		19		71		53
Total	$	65	$	51	$	176	$	145



	RSUs, PSUs and Market-based PSUs Outstanding				Options Outstanding
	Number of Shares		Weighted Average Grant-Date Fair Value Per Share		Number of Shares		Weighted Average Exercise Price Per Share
	(In millions, except per share data)
Balances, January 31, 2016	26		$	19.12	13		$	14.49
Granted (1) (2)	11		$	48.88	—		$	—
Exercised	—		$	—	(4	)	$	14.44
Vested restricted stock	(9	)	$	17.84	—		$	—
Canceled and forfeited	(1	)	$	21.58	—		$	—
Balances, October 30, 2016	27		$	31.76	9		$	14.52


(1)	Includes PSUs that will be issued and eligible to vest if the corporate financial performance maximum target level for fiscal year 2017 is achieved. Depending on the actual level of achievement of the corporate performance target at the end of fiscal year 2017, the PSUs issued could range from 0 to 2 million shares.

(2)

Includes market-based PSUs that will be issued and eligible to vest if the maximum target for total shareholder return, or TSR, over the 3-year measurement period is achieved. Depending on the ranking of our TSR compared to the respective TSRs of the companies comprising the Standard & Poor’s 500 Index during a 3-year measurement period, the market-based PSUs issued could range from 0 to 0.3 million shares.



	October 30,		January 31,
	2016		2016
	(In millions)
Aggregate unearned stock-based compensation expense	$	662	$	381

Estimated weighted average amortization period	(In years)
Stock options	0.7		1.1
RSUs, PSUs and market-based PSUs	2.8		2.7
ESPP	0.6		0.7