Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2022	May 01, 2021	Apr. 30, 2022	May 01, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 3,044	$ 2,863	$ 8,997	$ 7,582
Available-for-sale investments:
Change in net unrealized gains and losses, net of tax benefit (expense) of $45 and $120 for the third quarter and first nine months of fiscal 2022, respectively, and $30 and $47 for the corresponding periods of fiscal 2021, respectively	(376)	(85)	(597)	(103)
Net (gains) losses reclassified into earnings, net of tax (benefit) expense of $2 and $7 for the third quarter and first nine months of fiscal 2022, respectively, and $5 and $12 for the corresponding periods of fiscal 2021, respectively	0	(17)	(11)	(34)
Total- Available-for-sale investments	(376)	(102)	(608)	(137)
Cash flow hedging instruments:
Change in unrealized gains and losses, net of tax benefit (expense) of $(10) and $(14) for the third quarter and first nine months of fiscal 2022, respectively, and $(5) and $(4) for the corresponding periods of fiscal 2021, respectively	35	16	49	12
Net (gains) losses reclassified into earnings, net of tax (benefit) expense of $2 and $3 for the third quarter and first nine months of fiscal 2022, respectively, and $1 and $2 for the corresponding periods of fiscal 2021, respectively	(10)	(6)	(12)	(10)
Total- Cash flow hedging instruments	25	10	37	2
Net change in cumulative translation adjustment and actuarial gains and losses net of tax benefit (expense) of $0 and $9 for the third quarter and first nine months of fiscal 2022, respectively, and $2 and $(1) for the corresponding periods of fiscal 2021, respectively	(323)	22	(475)	366
Other comprehensive income (loss)	(674)	(70)	(1,046)	231
Comprehensive income	$ 2,370	$ 2,793	$ 7,951	$ 7,813