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Goodwill (Tables)
12 Months Ended
Oct. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Allocated by Reportable Segments
The following table presents the goodwill allocated to Ciena’s operating segments as of October 31, 2020 and November 2, 2019, as well as the changes to goodwill during fiscal 2020 (in thousands):
Balance at November 2, 2019AcquisitionsImpairmentsTranslationBalance at October 31, 2020
Platform Software and Services$156,191 $— $— $— $156,191 
Blue Planet Automation Software and Services75,994 13,055 — — 89,049 
Networking Platforms65,752 — — (145)65,607 
Total$297,937 $13,055 $— $(145)$310,847