Stockholders' Deficit - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
Stockholders' Equity Note [Abstract]
Repurchases of common stock (shares)	0	29,000,000	3,600,000	98,000,000
Payment in connection with repurchases of shares		$ 1,000	$ 100	$ 3,547
Share repurchase authorization remaining	$ 2,000		$ 2,000