XML 55 R44.htm IDEA: XBRL DOCUMENT
v3.21.1

Stockholders' Equity (Tables) | 6 Months Ended
--- | ---
May 01, 2021
Equity [Abstract] |
Schedule of Stock Repurchase Program | The following table summarizes activity of the stock repurchase program, reported based on trade date:
| Shares Repurchased |  | Weighted-Average Price per Share |  | Amount Repurchased (in thousands)
Cumulative balance at October 31, 2020 | 5,710,912 |  |  | $ | 39.33 |  |  | $ | 224,611 |
Repurchase of common stock under the stock repurchase program | 735,075 |  |  | 53.60 |  |  | 39,398 |
Cumulative balance at May 1, 2021 | 6,445,987 |  |  | $ | 40.96 |  |  | $ | 264,009 |

X
- Definition Schedule Of Stock Repurchase Program [Table Text Block] + References No definition available. + Details
Name: | cien_ScheduleOfStockRepurchaseProgramTableTextBlock
Namespace Prefix: | cien_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
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