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INCOME TAXES (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018
Income Tax Examination [Line Items] |  |  |  |
Effective Income Tax Rate, Percent | 20.80% | 22.50% | 14.80% | (162.80%)
Provision for income taxes | $ 40 | $ 19 | $ 46 | $ (98)
Net Discrete Expense (Benefit) | $ (5) | $ 11 | $ (29) | (104)
Majority of company's entities [Member] |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Open tax year, from date |  |  | Aug. 01, 2014 |
Certain foreign entities [Member] |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Open Tax Year |  |  | 2008 |
U.S. Tax Cuts and Jobs Act, 2017 [Member] |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Net Discrete Expense (Benefit) |  |  |  | $ (103)
Malaysia Tax Authority [Member] |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Income Tax Examination, Description |  |  | The company is being audited in Malaysia for the 2008 tax year. Although this tax year pre-dates our spin-off from Agilent, pursuant to the agreement between Agilent and Keysight pertaining to tax matters, as finalized at the time of separation, for certain entities, including Malaysia, any historical tax liability is the responsibility of Keysight. In the fourth quarter of fiscal 2017, Keysight paid income taxes and penalties of $68 million on gains related to intellectual property rights, although we are currently in the process of appealing to the Special Commissioners of Income Tax in Malaysia. The company believes there are numerous defenses to the current assessment; the statute of limitations for the 2008 tax year in Malaysia was closed, and the income in question is exempt from tax in Malaysia. The company is disputing this assessment and pursuing all avenues to resolve this issue favorably for the company. |
Internal Revenue Service (IRS) [Member] |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Open tax year, from date |  |  | Nov. 01, 2014 |

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