XML 59 R45.htm IDEA: XBRL DOCUMENT v3.21.2

ACCOUNTS RECEIVABLE (Tables)

12 Months Ended

Oct. 30, 2021

Receivables [Abstract]

Activity in allowance for doubtful accounts

The following table summarizes the activity in Ciena’s allowance for credit losses for the fiscal years indicated (in thousands):

Year Ended						Beginning Balance						Effect of adoption of new accounting standard (Note 1)						Provisions						Net Deductions						Ending Balance
November 2, 2019						$	17,378					$	—					$	6,740					$	4,017					$	20,101
October 31, 2020 (1)						$	20,101					$	—					$	8,855					$	18,358					$	10,598
October 30, 2021						$	10,598					$	2,206					$	2,346					$	4,238					$	10,912

(1)The reduction in Ciena’s allowance for credit losses as of October 31, 2020 compared to November 2, 2019 is primarily due to the final settlement from a significant asset impairment of $12.2 million for a trade receivable related to a single customer in the APAC region recorded in fiscal 2017.

X

- References

No definition available.

+ Details

Name:	us-gaap_ReceivablesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3,4)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration