CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jul. 30, 2017	Jul. 31, 2016
Cash flows from operating activities:
Net income	$ 1,091	$ 469
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	96	92
Stock-based compensation expense	158	111
Deferred income taxes	115	77
Amortization of debt discount	2	14
Loss on early debt conversions	17	0
Net loss (gain) on sale and disposal of long-lived assets and investments	1	(3)
Other	8	7
Changes in operating assets and liabilities:
Accounts receivable	(387)	(138)
Inventories	(61)	(104)
Prepaid expenses and other assets	(15)	(17)
Accounts payable	(63)	131
Accrued and other current liabilities	9	(85)
Other long-term liabilities	16	(35)
Net cash provided by operating activities	987	519
Cash flows from investing activities:
Proceeds from sales of marketable securities	726	901
Proceeds from maturities of marketable securities	450	506
Proceeds from sale of long-lived assets and investments	0	6
Purchases of marketable securities	(36)	(1,415)
Purchases of property and equipment and intangible assets	(108)	(87)
Investment in non-affiliates	(16)	(4)
Net cash provided by (used in) investing activities	1,016	(93)
Cash flows from financing activities:
Payments related to repurchases of common stock	(758)	(509)
Repayment of Convertible Notes	(741)	0
Dividends paid	(166)	(124)
Proceeds related to employee stock plans	76	91
Payments related to tax on restricted stock units	(190)	(51)
Other	(2)	(3)
Net cash used in financing activities	(1,781)	(596)
Change in cash and cash equivalents	222	(170)
Cash and cash equivalents at beginning of period	1,766	596
Cash and cash equivalents at end of period	1,988	426
Other non-cash activity:
Assets acquired by assuming related liabilities	$ 32	$ 15