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OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 22, 2014 shares | Oct. 01, 2014 shares | Apr. 30, 2013 | Oct. 31, 2015 USD ($) segment | Oct. 31, 2014 USD ($) | Oct. 31, 2013 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Share-based compensation expense |  |  |  | $ 55,000,000 | $ 44,000,000 | $ 43,000,000
Calculated warranty term |  |  | 1 year | 3 years |  |
Number of reportable segments | segment |  |  |  | 2 |  |
Number of operating segments | segment |  |  |  | 2 |  |
Goodwill, impairment loss |  |  |  | $ 0 | 0 | 0
Impairment of acquired finite-lived intangible assets |  |  |  | 0 | 0 | 0
Advertising expense |  |  |  | 27,000,000 | 22,000,000 | 16,000,000
Cost method investment, carrying value |  |  |  | 4,000,000 |  |
Investments, fair value |  |  |  | 0 |  |
Impairment charge |  |  |  | 4,000,000 | 0 | 0
Cash and cash equivailient held outside US |  |  |  | 338,000,000 |  |
Fair value of our long-term debt exceeeds (below) the carrying value |  |  |  | $ (8,000,000) | 1,000,000 |
Operating lease, term of renewal contract |  |  |  | 10 years |  |
Accrued vacation benefits |  |  |  | $ 63,000,000 | 70,000,000 |
Foreign currency translation net gain (loss) |  |  |  | 5,000,000 | 0 | (4,000,000)
In Process Research and Development [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Impairment of intangible assets |  |  |  | $ 0 | $ 0 | $ 1,000,000
Minimum [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Finite lived intangible assets useful life |  |  |  | 6 months |  |
Operating lease, term of contract |  |  |  | 1 year |  |
Maximum [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Finite lived intangible assets useful life |  |  |  | 15 years |  |
Operating lease, term of contract |  |  |  | 25 years |  |
Machinery and Equipment [Member] | Minimum [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant and equipment - useful life |  |  |  | 3 years |  |
Machinery and Equipment [Member] | Maximum [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant and equipment - useful life |  |  |  | 10 years |  |
Software Development [Member] | Minimum [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant and equipment - useful life |  |  |  | 3 years |  |
Software Development [Member] | Maximum [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property, plant and equipment - useful life |  |  |  | 5 years |  |
Common Stock [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Number of Keysight shares issued per 2 shares of Agilent | shares | 1 |  |  |  |  |
Shares issued to Agilent shareholders | shares |  | 167,000,000 |  |  |  |

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