Stock-Based Compensation - Restricted Stock Units (Narrative) (Details) - Restricted Stock Units - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total grant date fair value of restricted stock awards vested	$ 442	$ 314	$ 278
Unrecognized pre-tax stock-based compensation expense related to non-vested restricted stock awards	$ 403
Remaining weighted-average vesting period	1 year 4 months 24 days