Stock-Based Compensation - Stock-Based Compensation Expense and Related Income Tax Benefits for Continuing Operations (Narrative) (Details) - 2021 ESPP - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash received from option exercises and purchases	$ 41	$ 72	$ 51
Benefit realized for tax deduction from option exercises	$ 3	$ 1	$ 2