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Interest And Other Income (Loss), Net

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Amount of the cost of borrowed funds accounted for as interest expense.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of restructuring charges, remediation cost, and asset impairment loss.

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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).

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The aggregate total amount of expenses directly related to the marketing or selling of products or services.

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Segment and Entity Wide Disclosures - Segment Revenue, Profit (loss) and the reconciliation to consolidated net income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Revenue:
Revenues	$ 3,572,131	$ 3,094,286	$ 2,801,687
Less: non-performance operating expenses
Selling and marketing	423,046	394,060	356,169
General and administrative	174,399	160,133	142,604
Amortization of intangible assets	21,808	15,737	33,029
Acquisition and integration costs	3,370	5,111	0
Significant asset impairments and restructuring costs	24,538	18,139	23,933
Add: other non-performance financial items
Interest and other income (loss), net	3,876	(12,029)	913
Interest expense	(37,452)	(55,249)	(55,852)
Loss on extinguishment and modification of debt	0	(13,887)	(3,657)
Provision (benefit) for income taxes	59,756	493,471	(1,105,827)
Net income (loss)	253,434	(344,690)	1,261,953
Networking Platforms
Revenue:
Revenues	2,911,318
Platform Software and Services
Revenue:
Revenues	155,376
Blue Planet Automation Software and Services
Revenue:
Revenues	54,555
Global Services
Revenue:
Revenues	450,882
Converged Packet Optical
Revenue:
Revenues	2,562,841
Packet Networking
Revenue:
Revenues	348,477
Platform Software and Services
Revenue:
Revenues	155,376
Blue Planet Automation Software and Services
Revenue:
Revenues	54,555
Maintenance Support and Training
Revenue:
Revenues	261,337
Installation and Deployment
Revenue:
Revenues	148,233
Consulting and Network Design
Revenue:
Revenues	41,312
Operating Segments
Revenue:
Revenues	3,572,131	3,094,286	2,801,687
Segment profit (loss) and the reconciliation to consolidated net income (loss)
Gross profit	993,927	823,126	770,457
Operating Segments \| Networking Platforms
Revenue:
Revenues	2,911,318	2,478,018	2,252,710
Segment profit (loss) and the reconciliation to consolidated net income (loss)
Gross profit	759,244	581,113	578,039
Operating Segments \| Platform Software and Services
Revenue:
Revenues	155,376
Segment profit (loss) and the reconciliation to consolidated net income (loss)
Gross profit	64,210	78,048	47,353
Operating Segments \| Blue Planet Automation Software and Services
Revenue:
Revenues	54,555
Segment profit (loss) and the reconciliation to consolidated net income (loss)
Gross profit	(17,769)	(8,240)	(14,817)
Operating Segments \| Global Services
Revenue:
Revenues	450,882	415,555	387,858
Segment profit (loss) and the reconciliation to consolidated net income (loss)
Gross profit	188,242	172,205	159,882
Operating Segments \| Converged Packet Optical \| Networking Platforms
Revenue:
Revenues	2,562,841	2,194,519	1,939,621
Operating Segments \| Converged Packet Optical \| Platform Software and Services
Revenue:
Revenues	0
Operating Segments \| Converged Packet Optical \| Blue Planet Automation Software and Services
Revenue:
Revenues	0
Operating Segments \| Converged Packet Optical \| Global Services
Revenue:
Revenues	0
Operating Segments \| Packet Networking \| Networking Platforms
Revenue:
Revenues	348,477	283,499	313,089
Operating Segments \| Packet Networking \| Platform Software and Services
Revenue:
Revenues	0
Operating Segments \| Packet Networking \| Blue Planet Automation Software and Services
Revenue:
Revenues	0
Operating Segments \| Packet Networking \| Global Services
Revenue:
Revenues	0
Operating Segments \| Platform Software and Services \| Networking Platforms
Revenue:
Revenues	0
Operating Segments \| Platform Software and Services \| Platform Software and Services
Revenue:
Revenues	155,376	173,949	145,009
Operating Segments \| Platform Software and Services \| Blue Planet Automation Software and Services
Revenue:
Revenues	0
Operating Segments \| Platform Software and Services \| Global Services
Revenue:
Revenues	0
Operating Segments \| Blue Planet Automation Software and Services \| Networking Platforms
Revenue:
Revenues	0
Operating Segments \| Blue Planet Automation Software and Services \| Platform Software and Services
Revenue:
Revenues	0
Operating Segments \| Blue Planet Automation Software and Services \| Blue Planet Automation Software and Services
Revenue:
Revenues	54,555	26,764	16,110
Operating Segments \| Blue Planet Automation Software and Services \| Global Services
Revenue:
Revenues	0
Operating Segments \| Maintenance Support and Training \| Networking Platforms
Revenue:
Revenues	0
Operating Segments \| Maintenance Support and Training \| Platform Software and Services
Revenue:
Revenues	0
Operating Segments \| Maintenance Support and Training \| Blue Planet Automation Software and Services
Revenue:
Revenues	0
Operating Segments \| Maintenance Support and Training \| Global Services
Revenue:
Revenues	261,337	245,161	227,400
Operating Segments \| Installation and Deployment \| Networking Platforms
Revenue:
Revenues	0
Operating Segments \| Installation and Deployment \| Platform Software and Services
Revenue:
Revenues	0
Operating Segments \| Installation and Deployment \| Blue Planet Automation Software and Services
Revenue:
Revenues	0
Operating Segments \| Installation and Deployment \| Global Services
Revenue:
Revenues	148,233	128,829	117,524
Operating Segments \| Consulting and Network Design \| Networking Platforms
Revenue:
Revenues	0
Operating Segments \| Consulting and Network Design \| Platform Software and Services
Revenue:
Revenues	0
Operating Segments \| Consulting and Network Design \| Blue Planet Automation Software and Services
Revenue:
Revenues	0
Operating Segments \| Consulting and Network Design \| Global Services
Revenue:
Revenues	$ 41,312	$ 41,565	$ 42,934