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ACQUISITIONS (Intangible Assets Acquired) (Details) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Jun. 14, 2019 | Apr. 18, 2017 | Oct. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets subject to amortization |  |  | $ 56
Prisma [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets | $ 56 |  |
Prisma [Member] | Developed Product Technology [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets subject to amortization | $ 42 |  |
Finite lived intangible assets useful life | 4 years |  |
Ixia [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets subject to amortization |  | $ 677 |
Total intangible assets |  | 744 |
Ixia [Member] | In Process Research and Development [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
In-process research and development |  | 67 |
Ixia [Member] | Developed Product Technology [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets subject to amortization |  | $ 423 |
Finite lived intangible assets useful life |  | 4 years |
Ixia [Member] | Customer Relationships [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets subject to amortization |  | $ 234 |
Finite lived intangible assets useful life |  | 7 years |
Ixia [Member] | Trademarks and Trade Names [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets subject to amortization |  | $ 12 |
Finite lived intangible assets useful life |  | 3 years |
Ixia [Member] | Backlog [Member] |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets subject to amortization |  | $ 8 |
Finite lived intangible assets useful life |  | 90 days |

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