Segments and Entity-Wide Disclosures (Tables)

6 Months Ended

Apr. 30, 2018

Segment Reporting [Abstract]

Schedule of Segment Revenue

The table below (in thousands) sets forth Ciena’s segment revenue for the respective periods:

	Quarter Ended April 30,				Six Months Ended April 30,
	2018		2017		2018		2017
Revenue:
Networking Platforms
Converged Packet Optical	$	527,867	$	505,161	$	955,297	$	922,911
Packet Networking	63,815		66,326		132,418		138,520
Total Networking Platforms	591,682		571,487		1,087,715		1,061,431
Software and Software-Related Services
Software Platforms	12,544		13,143		42,120		30,192
Software-Related Services	26,201		24,573		50,112		46,904
Total Software and Software-Related Services	38,745		37,716		92,232		77,096
Global Services
Maintenance Support and Training	60,904		58,241		116,862		113,231
Installation and Deployment	28,209		28,695		58,225		56,614
Consulting and Network Design	10,438		10,883		21,079		20,147
Total Global Services	99,551		97,819		196,166		189,992
Consolidated revenue	$	729,978	$	707,022	$	1,376,113	$	1,328,519

Schedule of Segment Profit (Loss) and the Reconciliation to Consolidated Net Income (Loss)

The table below (in thousands) sets forth Ciena’s segment profit and the reconciliation to consolidated net income (loss) during the respective periods indicated:

	Quarter Ended April 30,						Six Months Ended April 30,
	2018			2017			2018			2017
Segment profit:
Networking Platforms	$	126,823		$	150,464		$	215,392		$	264,210
Software and Software-Related Services	8,276			4,551			31,911			12,252
Global Services	41,284			41,602			82,321			77,071
Total segment profit	176,383			196,617			329,624			353,533
Less: Non-performance operating expenses
Selling and marketing	97,359			88,551			185,874			173,553
General and administrative	38,976			34,990			77,382			70,854
Amortization of intangible assets	3,623			10,980			7,246			25,531
Significant asset impairments and restructuring costs	4,359			4,276			10,320			6,671
Add: Other non-performance financial items
Interest expense and other income (loss), net	(11,735		)	(16,226		)	(23,894		)	(31,059		)
Less: Provision for income taxes	6,475			3,568			484,415			3,978
Consolidated net income (loss)	$	13,856		$	38,026		$	(459,507	)	$	41,887

Schedule of Ciena's Geographic Distribution of Revenue and Long-Lived Assets

For the periods below, Ciena's geographic distribution of equipment, building, furniture and fixtures was as follows (in thousands):

	April 30, 2018		October 31, 2017
Canada	$	197,632	$	203,491
United States	81,051		90,482
Other International	19,948		14,492
Total	$	298,631	$	308,465

Schedule of Revenue by Major Customers by Reporting Segments

For the periods below, AT&T was the only customer that accounted for at least 10% of Ciena’s revenue as follows (in thousands):

	Quarter Ended April 30,				Six Months Ended April 30,
	2018		2017		2018		2017
AT&T	$	85,419	$	107,532	$	176,065	$	203,969