Taxes on Earnings - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Jul. 31, 2025 |
Apr. 30, 2025 |
Jul. 31, 2024 |
Jul. 31, 2025 |
Jul. 31, 2024 |
Oct. 31, 2024 |
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| Income Tax Examination [Line Items] | ||||||
| Provision (benefit) for taxes | $ (17) | $ 96 | $ 94 | $ 323 | ||
| Effective tax rate (as a percent) | (6.50%) | 15.80% | 21.00% | |||
| Effective tax rate (as a percent) | (359.90%) | |||||
| Net income tax expense (benefit) | $ (106) | $ 0 | $ (217) | $ 0 | ||
| Income tax rate reconciliation, valuation allowance, amount | 76 | 76 | ||||
| Income tax benefit on restructuring charges, separation costs, transformation costs and acquisition and other related charges | 21 | 29 | ||||
| Net income tax benefits related to acquisition, disposition and other related charges | 4 | 9 | ||||
| Cost reduction program, amount | 33 | |||||
| Non domestic, amount | 33 | |||||
| Effective income tax rate reconciliation, benefit, share-based payment arrangement, amount | 30 | |||||
| Net income tax benefits related to acquisition, disposition and other related charges | 16 | 16 | ||||
| Disposition of asset | 22 | |||||
| Unrecognized tax benefits | 485 | 485 | $ 724 | |||
| Unrecognized tax benefits that would affect effective tax rate if realized | 345 | 345 | 344 | |||
| Unrecognized tax benefits, increase resulting from acquisition | 111 | |||||
| Interest on income taxes expense | 7 | |||||
| Income tax penalties expense | $ 0 | |||||
| Accrued income tax for interest and penalties | 52 | $ 52 | $ 58 | |||
| Income tax examination, description | The Company engages in continuous discussion and negotiation with tax authorities regarding tax matters in various jurisdictions. The Company is no longer subject to U.S. federal tax audits for years prior to 2020. The IRS is conducting audits of the Company's fiscal 2020 through 2022 U.S. federal income tax returns. Tax years of Juniper Networks through 2018 have been audited by the IRS, and Juniper Networks is not currently under examination by the IRS for other tax years. The Company does not expect complete resolution of any IRS audit cycle within the next 12 months. With respect to major state and foreign tax jurisdictions, the Company is no longer subject to tax authority examinations for years prior to 2005. It is reasonably possible that certain foreign tax issues may be concluded in the next 12 months, including issues involving resolution of certain intercompany transactions and other matters. The Company believes it is reasonably possible that its existing unrecognized tax benefits may be reduced by an amount up to $58 million within the next 12 months. | |||||
| Deferred tax asset increase | $ 26 | |||||
| Decrease in deferred tax asset | $ 65 | |||||
| Internal Revenue Service (IRS) | ||||||
| Income Tax Examination [Line Items] | ||||||
| Unrecognized tax benefits, decrease | $ 340 | |||||
| State, Local And Foreign Jurisdiction | ||||||
| Income Tax Examination [Line Items] | ||||||
| Income tax examination likelihood of conclusion period | 12 months | |||||
| Decrease in unrecognized tax benefits is reasonably possible | $ 58 | $ 58 | ||||
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- Definition Deferred Tax Asset, Net, Increase No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Cost Reduction Program, Amount No definition available.
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- Definition This represents income tax charges (benefits) and includes restructuring, separation, and other related cost. No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Net Of Tax Benefits, Percent No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Tax Settlement, Non Domestic, Amount No definition available.
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- Definition Income Tax Examination Likelihood of Conclusion Federal Foreign and State Tax Issues Period No definition available.
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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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 The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to disposition of asset. Includes, but is not limited to, intra-entity transfer of asset other than inventory. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition 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 the disposition of a business not qualifying as a discontinued operation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying statutory federal (national) tax rate to pretax income (loss) from continuing operation attributable to other reconciling item. Excludes state and local income tax expense (benefit), federal tax expense (benefit), statutory income tax expense (benefit) outside of country of domicile, tax credit, nondeductible expense, deduction, income tax settlement, income tax contingency, and cross-border tax law. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition 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 domestic income tax settlement. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expense for penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of increase in unrecognized tax benefits resulting from acquisitions. No definition available.
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- Definition Amount of interest expense for an underpayment of income taxes. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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