Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Oct. 31, 2025	Oct. 31, 2024
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 83	$ 83
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	300,000,000	300,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	9,600,000,000	9,600,000,000
Common stock, shares issued (in shares)	921,000,000	939,000,000
Common stock, shares outstanding (in shares)	921,000,000	939,000,000