Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended						6 Months Ended		9 Months Ended
	Jul. 31, 2023	Apr. 30, 2023	Jan. 31, 2023	Jul. 31, 2022	Apr. 30, 2022	Jan. 31, 2022	Apr. 30, 2023	Apr. 30, 2022	Jul. 31, 2023	Jul. 31, 2022
Numerator:
Net earnings, basic	$ 766			$ 1,122					$ 2,289	$ 3,155
Net earnings, diluted	$ 766			$ 1,122					$ 2,289	$ 3,155
Denominator:
Weighted-average shares used to compute basic net EPS (in shares)	993,000			1,024,000					991,000	1,052,000
Dilutive effect of employee stock plans (shares)	9,000			11,000					8,000	12,000
Weighted-average shares used to compute diluted net EPS (in shares)	1,002,000			1,035,000					999,000	1,064,000
Net earnings per share:
Basic earnings (usd per share)	$ 0.77	$ 1.06	$ 0.47	$ 1.10	$ 0.93	$ 0.97	$ 1.54	$ 1.91	$ 2.31	$ 3.00
Diluted earnings (usd per share)	$ 0.76	$ 1.06	$ 0.47	$ 1.08	$ 0.92	$ 0.96	$ 1.53	$ 1.89	$ 2.29	$ 2.97
Anti-dilutive weighted-average stock-based compensation awards (shares)	3,000			5,000					5,000	4,000