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SEGMENT AND ENTITY WIDE DISCLOSURES - Entity Wide Reporting (Details) - USD ($) $ in Thousands | Oct. 29, 2022 | Oct. 30, 2021
--- | --- | ---
Ciena's geographic distribution of equipment, furniture and fixtures |  |
Equipment, building, furniture and fixtures, net | $ 312,887 | $ 329,253
Canada |  |
Ciena's geographic distribution of equipment, furniture and fixtures |  |
Equipment, building, furniture and fixtures, net | 226,451 | 240,968
United States |  |
Ciena's geographic distribution of equipment, furniture and fixtures |  |
Equipment, building, furniture and fixtures, net | 47,515 | 50,744
Other International |  |
Ciena's geographic distribution of equipment, furniture and fixtures |  |
Equipment, building, furniture and fixtures, net | $ 38,921 | $ 37,541

X
- Definition Property, Plant, and Equipment, Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization and Operating Lease, Right-of-Use Asset + References No definition available. + Details
Name: | cien_PropertyPlantAndEquipmentFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortizationAndOperatingLeaseRightOfUseAsset
Namespace Prefix: | cien_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_GeographicAreasLongLivedAssetsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=cien_OtherInternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |