CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Oct. 27, 2019	Oct. 28, 2018
Cash flows from operating activities:
Net income	$ 1,845	$ 3,575
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	624	400
Depreciation and amortization	275	184
Deferred income taxes	(5)	30
Other	5	(35)
Changes in operating assets and liabilities:
Accounts receivable	(32)	(943)
Inventories	531	(620)
Prepaid expenses and other assets	55	(68)
Accounts payable	91	224
Accrued and other current liabilities	(103)	147
Other long-term liabilities	10	(49)
Net cash provided by operating activities	3,296	2,845
Cash flows from investing activities:
Proceeds from maturities of marketable securities	4,744	6,267
Proceeds from sales of marketable securities	3,363	114
Purchases of marketable securities	(1,461)	(10,112)
Purchases of property and equipment and intangible assets	(344)	(397)
Investment in non-affiliates	(6)	(9)
Net cash provided by (used in) investing activities	6,296	(4,137)
Cash flows from financing activities:
Proceeds related to employee stock plans	146	135
Payments related to tax on restricted stock units	(463)	(982)
Dividends paid	(292)	(273)
Payments related to repurchases of common stock	0	(855)
Repayment of Convertible Notes	0	(12)
Other	0	(2)
Net cash used in financing activities	(609)	(1,989)
Change in cash and cash equivalents	8,983	(3,281)
Cash and cash equivalents at beginning of period	782	4,002
Cash and cash equivalents at end of period	9,765	721
Other non-cash investing activity:
Assets acquired by assuming related liabilities	$ 87	$ 98