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Fair Value - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Fair Value - Narrative (Details) - USD ($) $ in Millions	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2026	Apr. 30, 2025	Oct. 31, 2025
Cloud & AI \| Corporate Investments and Other
Financial assets and liabilities measured at fair value on a recurring basis
Goodwill impairment charges		$ 1,400
Measurement Alternative
Financial assets and liabilities measured at fair value on a recurring basis
Unrealized gain (loss) on equity securities	$ 0	$ 0	$ 0	$ 0
Cumulative upward price adjustment	0		0
Fair Value
Financial assets and liabilities measured at fair value on a recurring basis
Fair value, short-term and long-term debt	21,100		21,100		$ 22,500
Carrying Value
Financial assets and liabilities measured at fair value on a recurring basis
Fair value, short-term and long-term debt	$ 21,200		$ 21,200		$ 22,400