XML 88 R77.htm IDEA: XBRL DOCUMENT
v3.21.2

STOCKHOLDERS’ EQUITY - Narrative (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Jul. 31, 2021 | Aug. 01, 2020 | Dec. 13, 2018
Equity [Abstract] |  |  |
Stock repurchase program authorized amount |  |  | $ 500,000,000
Payments for repurchase of common stock | $ 36,484,000 | $ 26,328,000 |

X
- Definition Payments For Repurchase Of Common Stock, Incentive And Share-Based Compensation Plans, Excluding Stock Options + References No definition available. + Details
Name: | cien_PaymentsForRepurchaseOfCommonStockIncentiveAndShareBasedCompensationPlansExcludingStockOptions
Namespace Prefix: | cien_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- 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