CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Oct. 28, 2018	Oct. 29, 2017
Cash flows from operating activities:
Net income	$ 3,575	$ 1,928
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	400	265
Depreciation and amortization	184	145
Deferred income taxes	30	158
Loss on early debt conversions	0	19
Other	(35)	15
Changes in operating assets and liabilities:
Accounts receivable	(943)	(342)
Inventories	(620)	(61)
Prepaid expenses and other assets	(68)	(26)
Accounts payable	224	27
Accrued and other current liabilities	147	(15)
Other long-term liabilities	(49)	31
Net cash provided by operating activities	2,845	2,144
Cash flows from investing activities:
Proceeds from maturities of marketable securities	6,267	739
Proceeds from sales of marketable securities	114	802
Purchases of marketable securities	(10,112)	(36)
Purchases of property and equipment and intangible assets	(397)	(177)
Investment in non-affiliates	(9)	(26)
Net cash provided by (used in) investing activities	(4,137)	1,302
Cash flows from financing activities:
Payments related to repurchases of common stock	(855)	(909)
Repayment of Convertible Notes	(12)	(803)
Dividends paid	(273)	(250)
Proceeds related to employee stock plans	135	132
Payments related to tax on restricted stock units	(982)	(577)
Other	(2)	(3)
Net cash used in financing activities	(1,989)	(2,410)
Change in cash and cash equivalents	(3,281)	1,036
Cash and cash equivalents at beginning of period	4,002	1,766
Cash and cash equivalents at end of period	721	2,802
Other non-cash investing activity:
Assets acquired by assuming related liabilities	$ 98	$ 20