Taxes on Earnings - Provision for Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Income Tax Disclosure [Abstract]
Net income tax charges (benefits)	$ (415)	$ (214)	$ (1,100)
Uncertain tax positions	273	(39)	27
Restructuring benefits	80	60	101
Net valuation allowance release	44	198	255
Filing of tax returns in various jurisdictions	28	14	58
Audit settlements in various jurisdictions	22		(60)
Litigation charges	16
Chnages in tax rate	69	25
Tax benefit related to acquisition charges		11	42
Internal reorganization			726
Tax charges for extinguishment of debt			25
Income tax benefits, reduced rates for subsidiaries in certain countries	$ 153	$ 217	$ 190
Income tax benefits, reduced rates for subsidiaries in certain countries (in dollars per share)	$ 0.16	$ 0.22	$ 0.19

Effective Income Tax Rate Reconciliation, Business Combination, Amount

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Effective Income Tax Rate Reconciliation, Debt Extinguishment, Amount

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Effective Income Tax Rate Reconciliation, Internal Reorganization, Amount

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Effective Income Tax Rate Reconciliation, Litigation Charges, Amount

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Effective Income Tax Rate Reconciliation, Restructuring Charges, Amount

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Effective Income Tax Rate Reconciliation, Uncertain Tax Position Charges, Amount

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Income Tax Reconciliation Other Discrete Items Tax Charges (Credits)

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to reduced rates for subsidiaries in certain countries resulting from certain employment actions and capital investments undertaken by the entity.

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Per share amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to reduced rates for subsidiaries in certain countries resulting from certain employment actions and capital investments undertaken by the entity.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

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