CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock Outstanding	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance, common stock outstanding (in shares) at Jul. 29, 2018		608
Beginning balances, shareholders' equity at Jan. 28, 2018	$ 7,471	$ 1	$ 5,351	$ (6,650)	$ (18)	$ 8,787
Increase (Decrease) in Shareholders' Equity
Other comprehensive income (loss)	(5)				(5)
Net income	2,345					2,345
Issuance of common stock from stock plans (in shares)		7
Issuance of common stock from stock plans	69		69
Tax withholding related to vesting of restricted stock units (in shares)		(2)
Tax withholding related to vesting of restricted stock units	(515)			(515)
Share repurchase (in shares)		(3)
Share repurchase	(655)			(655)
Exercise of convertible note hedges (in shares)		0
Exercise of convertible note hedges	0		1	(1)
Cash dividends declared and paid	(183)					(183)
Stock-based compensation	260		260
Ending balance, common stock outstanding (in shares) at Jan. 28, 2018		606
Ending balances, shareholders' equity at Jul. 29, 2018	8,795	$ 1	5,681	(7,821)	(23)	10,957
Beginning balance, common stock outstanding (in shares) at Jul. 29, 2018		608
Beginning balances, shareholders' equity at Apr. 29, 2018	7,717	$ 1	5,546	(7,755)	(23)	9,948
Increase (Decrease) in Shareholders' Equity
Other comprehensive income (loss)	0
Net income	1,101					1,101
Issuance of common stock from stock plans (in shares)		1
Issuance of common stock from stock plans	3		3
Tax withholding related to vesting of restricted stock units (in shares)		0
Tax withholding related to vesting of restricted stock units	(65)			(65)
Exercise of convertible note hedges (in shares)		0
Exercise of convertible note hedges			1	(1)
Cash dividends declared and paid	(92)					(92)
Stock-based compensation	131		131
Ending balance, common stock outstanding (in shares) at Apr. 29, 2018		607
Ending balances, shareholders' equity at Jul. 29, 2018	8,795	$ 1	5,681	(7,821)	(23)	10,957
Beginning balance, common stock outstanding (in shares) at Jul. 28, 2019		609
Beginning balances, shareholders' equity at Jan. 27, 2019	9,342	$ 1	6,051	(9,263)	(12)	12,565
Increase (Decrease) in Shareholders' Equity
Other comprehensive income (loss)	11				11
Net income	947					947
Issuance of common stock from stock plans (in shares)		5
Issuance of common stock from stock plans	83		83
Tax withholding related to vesting of restricted stock units (in shares)		(2)
Tax withholding related to vesting of restricted stock units	(261)			(261)
Cash dividends declared and paid	(195)					(195)
Stock-based compensation	409		409
Ending balance, common stock outstanding (in shares) at Jan. 27, 2019		606
Ending balances, shareholders' equity at Jul. 28, 2019	10,336	$ 1	6,543	(9,524)	(1)	13,317
Beginning balance, common stock outstanding (in shares) at Jul. 28, 2019		609
Beginning balances, shareholders' equity at Apr. 28, 2019	9,704	$ 1	6,317	(9,474)	(2)	12,862
Increase (Decrease) in Shareholders' Equity
Other comprehensive income (loss)	1				1
Net income	552					552
Tax withholding related to vesting of restricted stock units (in shares)		0
Tax withholding related to vesting of restricted stock units	(50)			(50)
Cash dividends declared and paid	(97)					(97)
Stock-based compensation	226		226
Ending balance, common stock outstanding (in shares) at Apr. 28, 2019		609
Ending balances, shareholders' equity at Jul. 28, 2019	$ 10,336	$ 1	$ 6,543	$ (9,524)	$ (1)	$ 13,317