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GOODWILL AND OTHER INTANGIBLE ASSETS (Disclosures and Components of Purchased Other Intangibles) (Details) - USD ($)
$ in Millions
Jul. 31, 2020
Oct. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, Gross carrying amount $ 1,331 $ 1,240
Accumulated Amortization and impairments 914 752
Amortizable intangible assets, Net book value 417 488
In-Process R&D 2 2
Intangible Assets, Gross (Excluding Goodwill) 1,333 1,242
Intangible Assets, Net (Excluding Goodwill) 419 490
Developed technology    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, Gross carrying amount 916 876
Accumulated Amortization and impairments 705 578
Intangible Assets, Net (Excluding Goodwill) 211 298
Backlog    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, Gross carrying amount 17 13
Accumulated Amortization and impairments 13 13
Intangible Assets, Net (Excluding Goodwill) 4 0
Trademark/Tradename    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, Gross carrying amount 34 34
Accumulated Amortization and impairments 24 21
Intangible Assets, Net (Excluding Goodwill) 10 13
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, Gross carrying amount 363 316
Accumulated Amortization and impairments 171 139
Intangible Assets, Net (Excluding Goodwill) 192 177
Noncompete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, Gross carrying amount 1 1
Accumulated Amortization and impairments 1 1
Intangible Assets, Net (Excluding Goodwill) $ 0 $ 0