v3.10.0.1

Taxes on Earnings - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2018 | Jul. 31, 2017 | Oct. 31, 2017
Income Tax Examination [Line Items] |  |  |  |  |
Effective tax rate (as a percent) | 2.80% | (128.00%) | 1003.90% | 89.90% |
Net income tax charges (benefits) | $ (68) | $ (290) | $ (3,300) | $ 236 |
Release of non-U.S. valuation allowances on deferred tax assets | 38 |  | 38 |  |
Income tax benefits from U.S. tax reform | 33 |  | 713 |  |
Net excess tax benefits related to stock compensation | 26 |  | 68 |  |
Income tax benefit on restructuring charges, separation costs, transformation costs and acquisition and other related charges |  | 61 | 74 | 129 |
Pre-Separation tax matters | 7 |  | 2,000 |  |
Foreign tax credit |  |  | 228 |  |
Benefit from liquidation of business |  |  | $ 203 |  |
U.S. provision-to-return adjustments |  | 29 |  | 29 |
Accrued divestiture tax |  | 189 |  | 189 |
Tax indemnification |  | 26 |  | 57 |
Valuation allowance |  |  |  | 473 |
Reduction resulting from lapse of applicable statute of limitations |  | $ 25 |  | 25 |
Federal statutory rate (as a percent) |  |  | 23.30% |  |
Transition tax |  |  | $ 1,100 |  |
Provisional tax benefit from Tax Cut and Jobs Act |  |  | 1,800 |  |
Unrecognized tax benefits | 8,700 |  | 8,700 |  | $ 11,300
Unrecognized tax benefits that would affect effective tax rate if realized | 1,100 |  | 1,100 |  | 3,000
Decrease from settlements with IRS |  |  | 2,600 |  |
Accrued income tax for interest and penalties | 179 |  | $ 179 |  | $ 304
Likelihood of no resolution period |  |  | 12 months |  |
Reasonably possible reduction in existing unrecognized tax benefits within the next 12 months | $ 85 |  | $ 85 |  |
Likelihood of conclusion period for certain federal, foreign and state tax issues |  |  | 12 months |  |
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff | Everett SpinCo |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |
Net income tax charges (benefits) |  |  |  | $ (79) |

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