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Stockholders' Equity (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
May 01, 2021 | May 02, 2020 | Dec. 13, 2018
Equity [Abstract] |  |  |
Stock repurchase program authorized amount |  |  | $ 500,000,000
Payments for repurchase of common stock | $ 27,893,000 | $ 18,200,000 |

X
- Definition Payments for Repurchase of Common Stock, Incentive and Share-based Compensation Plans, Excluding Stock Options + References No definition available. + Details
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Namespace Prefix: | cien_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant