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SEGMENT INFORMATION Segment Assets (Details) - USD ($)
$ in Millions
Apr. 30, 2019
Oct. 31, 2018
Segment Reporting Information [Line Items]    
Assets $ 6,190 $ 5,824
Communications Solutions Group    
Segment Reporting Information [Line Items]    
Assets 2,126 2,115
Electronic Industrial Solutions Group    
Segment Reporting Information [Line Items]    
Assets 912 888
Ixia Solutions Group    
Segment Reporting Information [Line Items]    
Assets 1,403 1,327
Operating Segments [Member]    
Segment Reporting Information [Line Items]    
Assets $ 4,441 $ 4,330