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REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 1,090	$ 990	$ 2,096	$ 1,827
Communications Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	676		1,299
Electronic Industrial Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	299		556
Ixia Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	115	$ 82	241	$ 190
Americas
Disaggregation of Revenue [Line Items]
Revenues	425		828
Americas | Communications Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	294		566
Americas | Electronic Industrial Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	66		123
Americas | Ixia Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	65		139
Europe
Disaggregation of Revenue [Line Items]
Revenues	179		358
Europe | Communications Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	90		186
Europe | Electronic Industrial Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	71		134
Europe | Ixia Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	18		38
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	486		910
Asia Pacific | Communications Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	292		547
Asia Pacific | Electronic Industrial Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	162		299
Asia Pacific | Ixia Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	32		64
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	961		1,848
Transferred at Point in Time | Communications Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	619		1,189
Transferred at Point in Time | Electronic Industrial Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	274		509
Transferred at Point in Time | Ixia Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	68		150
Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	129		248
Transferred over Time | Communications Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	57		110
Transferred over Time | Electronic Industrial Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	25		47
Transferred over Time | Ixia Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	47		91
Aerospace, defense and government
Disaggregation of Revenue [Line Items]
Revenues	245		468
Aerospace, defense and government | Communications Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	245		468
Aerospace, defense and government | Electronic Industrial Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	0		0
Aerospace, defense and government | Ixia Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	0		0
Commercial Communications
Disaggregation of Revenue [Line Items]
Revenues	431		831
Commercial Communications | Communications Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	431		831
Commercial Communications | Electronic Industrial Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	0		0
Commercial Communications | Ixia Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	0		0
Electronic Industrial
Disaggregation of Revenue [Line Items]
Revenues	299		556
Electronic Industrial | Communications Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	0		0
Electronic Industrial | Electronic Industrial Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	299		556
Electronic Industrial | Ixia Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	0		0
Ixia Solutions
Disaggregation of Revenue [Line Items]
Revenues	115		241
Ixia Solutions | Communications Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	0		0
Ixia Solutions | Electronic Industrial Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	0		0
Ixia Solutions | Ixia Solutions Group
Disaggregation of Revenue [Line Items]
Revenues	$ 115		$ 241

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Publisher FASB
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