CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Apr. 28, 2019	Apr. 29, 2018
Cash flows from operating activities:
Net income	$ 394	$ 1,244
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	178	129
Depreciation and amortization	91	57
Deferred income taxes	(42)	51
Other	(2)	(8)
Changes in operating assets and liabilities:
Accounts receivable	182	56
Inventories	153	(2)
Prepaid expenses and other assets	5	(38)
Accounts payable	(123)	22
Accrued and other current liabilities	(129)	(81)
Other long-term liabilities	13	15
Net cash provided by operating activities	720	1,445
Cash flows from investing activities:
Proceeds from maturities of marketable securities	2,219	239
Proceeds from sales of marketable securities	26	33
Purchases of marketable securities	(622)	(3,705)
Purchases of property and equipment and intangible assets	(128)	(118)
Net cash provided by (used in) investing activities	1,495	(3,551)
Cash flows from financing activities:
Proceeds related to employee stock plans	83	66
Payments related to tax on restricted stock units	(211)	(449)
Dividends paid	(97)	(91)
Payments related to repurchases of common stock	0	(655)
Repayment of Convertible Notes	0	(2)
Net cash used in financing activities	(225)	(1,131)
Change in cash and cash equivalents	1,990	(3,237)
Cash and cash equivalents at beginning of period	782	4,002
Cash and cash equivalents at end of period	2,772	765
Other non-cash investing activity:
Assets acquired by assuming related liabilities	$ 114	$ 43