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SEGMENTS AND ENTITY-WIDE DISCLOSURES - Other Intangibles Assets, Goodwill and Maintenance Spares (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Segment Reporting Information [Line Items]
Other intangible assets, net	$ 73,974
Goodwill	311,569	$ 310,847
Maintenance spares, net	61,048
Networking Platforms
Segment Reporting Information [Line Items]
Other intangible assets, net	9,865
Goodwill	66,329
Maintenance spares, net	0
Platform Software and Services
Segment Reporting Information [Line Items]
Other intangible assets, net	0
Goodwill	156,191
Maintenance spares, net	0
Blue Planet Automation Software and Services
Segment Reporting Information [Line Items]
Other intangible assets, net	64,109
Goodwill	89,049
Maintenance spares, net	0
Global Services
Segment Reporting Information [Line Items]
Other intangible assets, net	0
Goodwill	0
Maintenance spares, net	$ 61,048

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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