Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Jul. 25, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 11,812	$ 10,591	$ 11,214
Available-for-sale investments:
Change in net unrealized gains and losses, net of tax benefit (expense) of $174, $46, and $(84) for fiscal 2022, 2021, and 2020, respectively	(557)	(95)	336
Net (gains) losses reclassified into earnings, net of tax expense (benefit) of $5, $15, and $21 for fiscal 2022, 2021, and 2020, respectively	(4)	(38)	(21)
Total available-for-sale investments	(561)	(133)	315
Cash flow hedging instruments:
Change in unrealized gains and losses, net of tax benefit (expense) of $(20), $(4), and $0 for fiscal 2022, 2021, and 2020, respectively	67	16	7
Net (gains) losses reclassified into earnings, net of tax (benefit) expense of $7, $3, and $0 for fiscal 2022, 2021, and 2020, respectively	(22)	(11)	1
Total cash flow hedging instruments	45	5	8
Net change in cumulative translation adjustment and actuarial gains and losses, net of tax benefit (expense) of $(44), $(2), and $(5) for fiscal 2022, 2021, and 2020, respectively	(689)	230	(50)
Other comprehensive income (loss)	(1,205)	102	273
Comprehensive income	$ 10,607	$ 10,693	$ 11,487