v3.22.2.2
Cover - shares
 9 Months Ended
Jul. 30, 2022
Sep. 02, 2022
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jul. 30, 2022  
Document Transition Report false  
Entity File Number 001-36250  
Entity Registrant Name Ciena Corp  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 23-2725311  
Entity Address, Address Line One 7035 Ridge Road  
Entity Address, City or Town Hanover  
Entity Address, State or Province MD  
Entity Address, Postal Zip Code 21076  
City Area Code 410  
Local Phone Number 694-5700  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol CIEN  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   148,141,810
Entity Central Index Key 0000936395  
Current Fiscal Year End Date --10-29  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q3  
Amendment Flag false