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INVENTORIES (Tables)

12 Months Ended

Nov. 02, 2024

Inventory Disclosure [Abstract]

Schedule of Inventories

As of the dates indicated, inventories are comprised of the following (in thousands):

			November 2, 2024						October 28, 2023
Raw materials			$	542,785					$	664,797
Work-in-process			32,219						55,242
Finished goods			324,697						314,168
Deferred cost of goods sold			27,902						66,634
Gross inventories			927,603						1,100,841
Reserve for excess and obsolescence			(107,173)						(50,003)
Inventories, net			$	820,430					$	1,050,838

Schedule of Activity in Reserve for Excess and Obsolete Inventory

The following table summarizes the activity in Ciena’s reserve for excess and obsolete inventory for the fiscal years indicated (in thousands):

Year Ended						Beginning Balance						Provisions						Disposals						Ending Balance
October 29, 2022						$	36,959					$	16,184					$	17,057					$	36,086
October 28, 2023						$	36,086					$	29,464					$	15,547					$	50,003
November 2, 2024						$	50,003					$	77,341					$	20,171					$	107,173

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Schedule of Inventory Valuation Reserves [Table Text Block]

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Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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-Topic 210
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-Name Accounting Standards Codification
-Section S99
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