COMMITMENTS AND CONTINGENCIES	6 Months Ended
May 02, 2026
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Tax Contingencies Ciena is subject to various tax contingencies arising in the ordinary course of business. Ciena does not expect that the ultimate settlement of these contingencies will have a material effect on its financial position or cash flows. Share-based compensation expense impacts Ciena’s tax rate. These deductions are valued at vesting for tax purposes and can increase or decrease the effective tax rate in the period in which they vest. Litigation Ciena is subject to various legal proceedings, claims, and other matters arising in the ordinary course of business, including those that relate to employment, commercial, tax, and other regulatory matters. Ciena is also subject to intellectual property related claims, including claims against third parties that may involve contractual indemnification obligations on the part of Ciena. Ciena does not expect that the ultimate costs to resolve such matters will have a material effect on its results of operations, financial position, or cash flows. Purchase Order Obligations Ciena has certain advanced orders for supply of certain long lead time components. As of May 2, 2026, Ciena had $2.8 billion in outstanding purchase order commitments to contract manufacturers and component suppliers for inventory. In certain instances, Ciena is permitted to cancel, reschedule or adjust a portion of these orders.

COMMITMENTS AND CONTINGENCIES

6 Months Ended

May 02, 2026

Commitments and Contingencies Disclosure [Abstract]

Tax Contingencies

Ciena is subject to various tax contingencies arising in the ordinary course of business. Ciena does not expect that the ultimate settlement of these contingencies will have a material effect on its financial position or cash flows.

Share-based compensation expense impacts Ciena’s tax rate. These deductions are valued at vesting for tax purposes and can increase or decrease the effective tax rate in the period in which they vest.

Litigation

Ciena is subject to various legal proceedings, claims, and other matters arising in the ordinary course of business, including those that relate to employment, commercial, tax, and other regulatory matters. Ciena is also subject to intellectual property related claims, including claims against third parties that may involve contractual indemnification obligations on the part of Ciena. Ciena does not expect that the ultimate costs to resolve such matters will have a material effect on its results of operations, financial position, or cash flows.

Purchase Order Obligations

Ciena has certain advanced orders for supply of certain long lead time components. As of May 2, 2026, Ciena had $2.8 billion in outstanding purchase order commitments to contract manufacturers and component suppliers for inventory. In certain instances, Ciena is permitted to cancel, reschedule or adjust a portion of these orders.