XML 56 R45.htm IDEA: XBRL DOCUMENT
v3.20.2

Stockholders' Equity (Tables) | 9 Months Ended
--- | ---
Aug. 01, 2020
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 November 2, 2019 | 3,838,466 |  |  | $ | 39.10 |  |  | $ | 150,076 |
Repurchase of common stock under the stock repurchase program | 1,872,446 |  |  | 39.81 |  |  | 74,535 |
Cumulative balance at August 1, 2020 | 5,710,912 |  |  | $ | 39.33 |  |  | $ | 224,611 |

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