CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	May. 01, 2016	Apr. 26, 2015
Cash flows from operating activities:
Net income	$ 196	$ 134
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	45	54
Stock-based compensation	53	45
Amortization of debt discount	8	7
Net gain on sale and disposal of long-lived assets and investments	(3)	(3)
Deferred income taxes	33	28
Tax benefits from stock-based compensation	(9)	(6)
Other	4	7
Changes in operating assets and liabilities:
Accounts receivable	(17)	18
Inventories	23	45
Prepaid expenses and other assets	(18)	(17)
Accounts payable	32	(67)
Accrued and other current liabilities	(7)	58
Other long-term liabilities	(31)	(57)
Net cash provided by operating activities	309	246
Cash flows from investing activities:
Proceeds from sales of marketable securities	529	825
Proceeds from maturities of marketable securities	175	238
Purchases of marketable securities	(469)	(1,267)
Purchases of property and equipment and intangible assets	(55)	(30)
Other	(4)	(1)
Net cash provided by (used in) investing activities	176	(235)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee stock plans	20	50
Tax benefits from stock-based compensation	9	6
Payments related to repurchases of common stock	(500)	(53)
Dividends paid	(62)	(46)
Payments under capital lease obligations	(1)	(1)
Net cash used in financing activities	(534)	(44)
Change in cash and cash equivalents	(49)	(33)
Cash and cash equivalents at beginning of period	596	497
Cash and cash equivalents at end of period	547	464
Other non-cash activity:
Assets acquired by assuming related liabilities	$ 11	$ 4