    <SEC-DOCUMENT>0000936395-25-000037-index.html : 20250904
    <SEC-HEADER>0000936395-25-000037.hdr.sgml : 20250904
    <ACCEPTANCE-DATETIME>20250904070208
    ACCESSION NUMBER:		0000936395-25-000037
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		44
    CONFORMED PERIOD OF REPORT:	20250904
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20250904
    DATE AS OF CHANGE:		20250904

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CIENA CORP
    		CENTRAL INDEX KEY:			0000936395
    		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
    		ORGANIZATION NAME:           	04 Manufacturing
    		EIN:				232725311
    		STATE OF INCORPORATION:			MD
    		FISCAL YEAR END:			1101

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-36250
    		FILM NUMBER:		251291865

    	BUSINESS ADDRESS:
    		STREET 1:		7035 RIDGE ROAD
    		CITY:			HANOVER
    		STATE:			MD
    		ZIP:			21076
    		BUSINESS PHONE:		4108658500

    	MAIL ADDRESS:
    		STREET 1:		7035 RIDGE ROAD
    		CITY:			HANOVER
    		STATE:			MD
    		ZIP:			21076
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>cien-20250904.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: cien-20250904.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>ex9912025q3earningspressre.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: ex9912025q3earningspressre.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>ex9922025q3earningsprese.htm
    <DESCRIPTION>EX-99.2
    <TEXT>
    Document 3 - file: ex9922025q3earningsprese.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>cien-20250904.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 4 - file: cien-20250904.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>5
    <FILENAME>cien-20250904_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: cien-20250904_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>6
    <FILENAME>cien-20250904_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 6 - file: cien-20250904_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>ex9922025q3earningsprese001.jpg
    <TEXT>
    Document 7 - file: ex9922025q3earningsprese001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>ex9922025q3earningsprese002.jpg
    <TEXT>
    Document 8 - file: ex9922025q3earningsprese002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>ex9922025q3earningsprese003.jpg
    <TEXT>
    Document 9 - file: ex9922025q3earningsprese003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>ex9922025q3earningsprese004.jpg
    <TEXT>
    Document 10 - file: ex9922025q3earningsprese004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>ex9922025q3earningsprese005.jpg
    <TEXT>
    Document 11 - file: ex9922025q3earningsprese005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>ex9922025q3earningsprese006.jpg
    <TEXT>
    Document 12 - file: ex9922025q3earningsprese006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>ex9922025q3earningsprese007.jpg
    <TEXT>
    Document 13 - file: ex9922025q3earningsprese007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>ex9922025q3earningsprese008.jpg
    <TEXT>
    Document 14 - file: ex9922025q3earningsprese008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>ex9922025q3earningsprese009.jpg
    <TEXT>
    Document 15 - file: ex9922025q3earningsprese009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>ex9922025q3earningsprese010.jpg
    <TEXT>
    Document 16 - file: ex9922025q3earningsprese010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>ex9922025q3earningsprese011.jpg
    <TEXT>
    Document 17 - file: ex9922025q3earningsprese011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>ex9922025q3earningsprese012.jpg
    <TEXT>
    Document 18 - file: ex9922025q3earningsprese012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>ex9922025q3earningsprese013.jpg
    <TEXT>
    Document 19 - file: ex9922025q3earningsprese013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>ex9922025q3earningsprese014.jpg
    <TEXT>
    Document 20 - file: ex9922025q3earningsprese014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>ex9922025q3earningsprese015.jpg
    <TEXT>
    Document 21 - file: ex9922025q3earningsprese015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>ex9922025q3earningsprese016.jpg
    <TEXT>
    Document 22 - file: ex9922025q3earningsprese016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>ex9922025q3earningsprese017.jpg
    <TEXT>
    Document 23 - file: ex9922025q3earningsprese017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>ex9922025q3earningsprese018.jpg
    <TEXT>
    Document 24 - file: ex9922025q3earningsprese018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>ex9922025q3earningsprese019.jpg
    <TEXT>
    Document 25 - file: ex9922025q3earningsprese019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>ex9922025q3earningsprese020.jpg
    <TEXT>
    Document 26 - file: ex9922025q3earningsprese020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>ex9922025q3earningsprese021.jpg
    <TEXT>
    Document 27 - file: ex9922025q3earningsprese021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>ex9922025q3earningsprese022.jpg
    <TEXT>
    Document 28 - file: ex9922025q3earningsprese022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>ex9922025q3earningsprese023.jpg
    <TEXT>
    Document 29 - file: ex9922025q3earningsprese023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>ex9922025q3earningsprese024.jpg
    <TEXT>
    Document 30 - file: ex9922025q3earningsprese024.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>ex9922025q3earningsprese025.jpg
    <TEXT>
    Document 31 - file: ex9922025q3earningsprese025.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>ex9922025q3earningsprese026.jpg
    <TEXT>
    Document 32 - file: ex9922025q3earningsprese026.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>ex9922025q3earningsprese027.jpg
    <TEXT>
    Document 33 - file: ex9922025q3earningsprese027.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>ex9922025q3earningsprese028.jpg
    <TEXT>
    Document 34 - file: ex9922025q3earningsprese028.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>ex9922025q3earningsprese029.jpg
    <TEXT>
    Document 35 - file: ex9922025q3earningsprese029.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>ex9922025q3earningsprese030.jpg
    <TEXT>
    Document 36 - file: ex9922025q3earningsprese030.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>38
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 38 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>39
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 39 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>40
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 40 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>42
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 42 - file: FilingSummary.html

    Document 42 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>44
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 44 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>45
    <FILENAME>0000936395-25-000037-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 45 - file: 0000936395-25-000037-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>46
    <FILENAME>cien-20250904_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 46 - file: cien-20250904_htm.html

    Document 46 - RAW XML: cien-20250904_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>