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SEGMENT AND ENTITY WIDE DISCLOSURES - Entity Wide Reporting (Details) - USD ($) $ in Thousands | Oct. 28, 2023 | Oct. 29, 2022
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Ciena's geographic distribution of equipment, furniture and fixtures |  |
Equipment, building, furniture and fixtures, net | $ 315,287 | $ 312,887
Canada |  |
Ciena's geographic distribution of equipment, furniture and fixtures |  |
Equipment, building, furniture and fixtures, net | 229,707 | 226,451
United States |  |
Ciena's geographic distribution of equipment, furniture and fixtures |  |
Equipment, building, furniture and fixtures, net | 46,933 | 47,515
Other International |  |
Ciena's geographic distribution of equipment, furniture and fixtures |  |
Equipment, building, furniture and fixtures, net | $ 38,647 | $ 38,921

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: |