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SEGMENT INFORMATION Profitability (Details) $ in Millions | 3 Months Ended
--- | ---
Jan. 31, 2020 USD ($) | Jan. 31, 2019 USD ($)
Segment Reporting Information [Line Items] |  |
Number of Reportable Segments | 2 |
Number of Operating Segments | 2 |
Segment Reporting, Factors Used to Identify Entity's Reportable Segments | Our operating segments were determined based primarily on how the chief operating decision maker views and evaluates our operations. Segment operating results are regularly reviewed by the chief operating decision maker to make decisions about resources to be allocated to each segment and to assess performance. Other factors, including market separation and customer specific applications, go-to-market channels, products and services and manufacturing are considered in determining the formation of these operating segments. |
Segment Reporting, Additional Information about Entity's Reportable Segments | The Communications Solutions Group serves customers spanning the worldwide commercial communications and aerospace, defense, and government end markets. The group’s solutions consist of electronic design and test software, instruments, systems and related services, network test, network visibility, and security solutions. These solutions are used in the simulation, design, validation, manufacturing, installation, and optimization of electronic equipment and networks. The Electronic Industrial Solutions Group provides test and measurement solutions and related services across a broad set of electronic industrial end markets, focusing on high-value applications in the automotive and energy industry and measurement solutions for consumer electronics, education, general electronics design and manufacturing, and semiconductor design and manufacturing. The group provides electronic design and test software, instruments and systems and related services used in the simulation, design, validation, manufacturing, installation and optimization of electronic equipment. |
Amortization of acquisition-related balances |  | $ 3
Total segment revenue | $ 1,095 | 1,006
Income from operations | 203 | 121
Communications Solutions Group |  |
Segment Reporting Information [Line Items] |  |
Amortization of acquisition-related balances |  | 3
Total segment revenue | 818 | 749
Electronic Industrial Solutions Group |  |
Segment Reporting Information [Line Items] |  |
Amortization of acquisition-related balances |  | 0
Total segment revenue | 277 | 257
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Total segment revenue |  | 1,009
Income from operations | 274 | 204
Operating Segments [Member] | Communications Solutions Group |  |
Segment Reporting Information [Line Items] |  |
Total segment revenue |  | 752
Income from operations | 201 | 150
Operating Segments [Member] | Electronic Industrial Solutions Group |  |
Segment Reporting Information [Line Items] |  |
Total segment revenue |  | 257
Income from operations | $ 73 | $ 54

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