Supplementary Financial Information - Costs of Obtaining Contracts (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
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| Capitalized Contract Cost [Line Items] | |||
| Contract cost amortization | $ 68 | $ 86 | |
| Contract liability | 3,200 | 2,900 | $ 2,700 |
| Revenue recognized | 1,500 | 1,400 | |
| Deferred contract fulfillment | |||
| Capitalized Contract Cost [Line Items] | |||
| Capitalized contract costs | 33 | 36 | |
| Acquisition costs | |||
| Capitalized Contract Cost [Line Items] | |||
| Capitalized contract costs | $ 42 | $ 50 | |
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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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