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SEGMENT AND ENTITY WIDE DISCLOSURES - Geographic Distribution of Equipment, Building, Furniture and Fixtures (Details) - USD ($) $ in Thousands	Nov. 02, 2024	Oct. 28, 2023
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, building, furniture and fixtures, net	$ 365,139	$ 315,287
Canada
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, building, furniture and fixtures, net	283,760	229,707
United States
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, building, furniture and fixtures, net	49,195	46,933
Other International
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, building, furniture and fixtures, net	$ 32,184	$ 38,647

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- Definition

Property, Plant, and Equipment, Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization and Operating Lease, Right-of-Use Asset

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No definition available.

+ Details

Name:	cien_PropertyPlantAndEquipmentFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortizationAndOperatingLeaseRightOfUseAsset
Namespace Prefix:	cien_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

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- Details

Name:	srt_StatementGeographicalAxis=country_CA
Namespace Prefix:
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Period Type:

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- Details

Name:	srt_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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- Details

Name:	srt_StatementGeographicalAxis=cien_OtherInternationalMember
Namespace Prefix:
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