Stock-Based Compensation - Stock-Based Compensation Expense and Related Income Tax Benefits for Continuing Operations (Narrative) (Details) - 2011 ESPP - 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]
Cash received from option exercises and purchases	$ 51	$ 53	$ 55
Benefit realized for tax deduction from option exercises	$ 2	$ 4	$ 3