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ACCOUNTS RECEIVABLE
 12 Months Ended
Nov. 01, 2025
Receivables [Abstract]  
ACCOUNTS RECEIVABLE ACCOUNTS RECEIVABLE
As of November 1, 2025, two customers accounted for 15.0% and 11.0% of net accounts receivable, respectively. As of November 2, 2024, two customers accounted for 13.0% and 12.0% of net accounts receivable, respectively. Ciena has not historically experienced a significant amount of bad debt expense. The following table summarizes the activity in Ciena’s allowance for credit losses for the fiscal years indicated (in thousands):
Year EndedBeginning BalanceProvisionsNet DeductionsEnding Balance
October 28, 2023
$10,958 $5,718 $5,022 $11,654 
November 2, 2024
$11,654 $7,996 $9,770 $9,880 
November 1, 2025
$9,880 $4,226 $2,894 $11,212 

Accounts Receivable Factoring
Ciena may service transferred receivables which qualify as sales of receivables. Amounts sold through these arrangements during fiscal 2025, 2024, and 2023 were $1.0 million, $18.1 million, and $60.3 million, respectively. Additionally, Ciena may settle receivables through customer paying agent arrangements. Amounts settled through these arrangements for fiscal 2025, 2024, and 2023 were $50.9 million, $32.5 million, and $41.9 million, respectively. Factoring related expense recorded to interest and other income, net was $0.9 million, $1.2 million, and $3.8 million for fiscal 2025, 2024, and 2023, respectively.