$CIEN
CIENA CORP Stock $cien

$cien Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000093639521000054 Filed on December 17, 2021

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$1.041B	$3.621B	$828.5M
YoY Change	25.71%	2.51%	-14.41%
Cost Of Revenue	$564.4M	$1.899B	$424.1M
YoY Change	33.07%	1.03%	-22.65%
Gross Profit	$477.1M	$1.722B	$404.3M
YoY Change	18.01%	4.18%	-3.67%
Gross Profit Margin	45.81%	47.56%	48.8%
Selling, General & Admin	$179.0M	$634.1M	$156.8M
YoY Change	14.16%	8.21%	-6.39%
% of Gross Profit	37.52%	36.82%	38.78%
Research & Development	$147.5M	$536.7M	$137.2M
YoY Change	7.47%	1.28%	-3.18%
% of Gross Profit	30.91%	31.17%	33.94%
Depreciation & Amortization	$33.01M	$96.23M	$33.10M
YoY Change	-0.28%	2.48%	6.77%
% of Gross Profit	6.92%	5.59%	8.19%
Operating Expenses	$332.3M	$1.227B	$299.9M
YoY Change	10.8%	5.21%	-4.61%
Operating Profit	$144.8M	$495.4M	$104.4M
YoY Change	38.72%	1.72%	-0.85%
Interest Expense	-$7.629M	$30.84M	-$9.900M
YoY Change	-22.94%	-1.55%	-1.0%
% of Operating Profit	-5.27%	6.23%	-9.48%
Other Income/Expense, Net	-$455.0K	-$369.0K	$2.300M
YoY Change	-119.78%	-123.43%	-866.67%
Pretax Income	$129.3M	$462.8M	$85.80M
YoY Change	50.73%	1.49%	3.5%
Income Tax	$25.83M	-$37.45M	$20.80M
% Of Pretax Income	19.97%	-8.09%	24.24%
Net Earnings	$103.5M	$500.2M	$65.00M
YoY Change	59.23%	38.45%	-19.05%
Net Earnings / Revenue	9.94%	13.81%	7.85%
Basic Earnings Per Share		$3.22
Diluted Earnings Per Share	$660.3K	$3.19	$415.1K
COMMON SHARES
Basic Shares Outstanding	154.9M shares	155.3M shares	154.6M shares
Diluted Shares Outstanding		156.7M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.604B	$1.604B	$1.239B
YoY Change	29.43%	29.43%	22.22%
Cash & Equivalents	$1.423B	$1.423B	$1.089B
Short-Term Investments	$181.5M	$181.5M	$150.7M
Other Short-Term Assets	$205.9M	$205.9M	$286.1M
YoY Change	-28.04%	-28.04%	6.04%
Inventory	$374.3M	$374.3M	$344.4M
Prepaid Expenses
Receivables	$885.0M	$986.3M	$719.4M
Other Receivables	$18.41M	$18.41M	$22.00M
Total Short-Term Assets	$3.189B	$3.189B	$2.611B
YoY Change	22.13%	22.12%	9.63%
LONG-TERM ASSETS
Property, Plant & Equipment	$329.3M	$329.3M	$329.4M
YoY Change	-0.04%	-0.04%	14.82%
Goodwill	$311.6M		$310.8M
YoY Change	0.26%		4.33%
Intangibles	$65.31M		$96.65M
YoY Change	-32.42%		-14.31%
Long-Term Investments	$70.04M	$78.62M	$82.20M
YoY Change	-14.8%	-17.77%	297.1%
Other Assets	$99.89M	$885.7M	$102.8M
YoY Change	-2.86%	20.8%	15.56%
Total Long-Term Assets	$1.676B	$1.676B	$1.570B
YoY Change	6.79%	6.79%	0.31%
TOTAL ASSETS
Total Short-Term Assets	$3.189B	$3.189B	$2.611B
Total Long-Term Assets	$1.676B	$1.676B	$1.570B
Total Assets	$4.865B	$4.865B	$4.181B
YoY Change	16.37%	16.37%	5.94%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$356.2M	$356.2M	$291.9M
YoY Change	22.02%	22.02%	-15.35%
Accrued Expenses	$409.3M	$410.7M	$334.1M
YoY Change	22.49%	17.25%	-12.7%
Deferred Revenue	$118.0M		$108.7M
YoY Change	8.56%		-2.41%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$6.930M	$10.55M	$6.930M
YoY Change	0.0%	7.65%	-1.0%
Total Short-Term Liabilities	$909.0M	$909.0M	$760.7M
YoY Change	19.5%	19.5%	-10.08%
LONG-TERM LIABILITIES
Long-Term Debt	$670.4M	$732.9M	$676.4M
YoY Change	-0.89%	-0.67%	-0.6%
Other Long-Term Liabilities	$166.8M	$203.2M	$123.2M
YoY Change	35.41%	17.68%	-17.18%
Total Long-Term Liabilities	$837.2M	$936.2M	$799.5M
YoY Change	4.7%	2.81%	-3.57%
TOTAL LIABILITIES
Total Short-Term Liabilities	$909.0M	$909.0M	$760.7M
Total Long-Term Liabilities	$837.2M	$936.2M	$799.5M
Total Liabilities	$1.845B	$1.845B	$1.671B
YoY Change	10.4%	10.41%	-2.86%
SHAREHOLDERS EQUITY
Retained Earnings	-$3.785B		-$4.283B
YoY Change	-11.63%		-7.78%
Common Stock	$6.805B		$6.828B
YoY Change	-0.34%		-0.16%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.020B	$3.020B	$2.510B
YoY Change
Total Liabilities & Shareholders Equity	$4.865B	$4.865B	$4.181B
YoY Change	16.37%	16.37%	5.94%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$103.5M	$500.2M	$65.00M
YoY Change	59.23%	38.45%	-19.05%
Depreciation, Depletion And Amortization	$33.01M	$96.23M	$33.10M
YoY Change	-0.28%	2.48%	6.77%
Cash From Operating Activities	$254.9M	$541.6M	$187.3M
YoY Change	36.09%	9.72%	-21.96%
INVESTING ACTIVITIES
Capital Expenditures	-$12.26M	$79.55M	-$21.40M
YoY Change	-42.71%	-3.77%	58.52%
Acquisitions		$0.00
YoY Change		-100.0%
Other Investing Activities	-$12.34M	-$11.17M	-$162.5M
YoY Change	-92.41%	-91.88%	-8652.63%
Cash From Investing Activities	-$24.60M	-$90.72M	-$183.8M
YoY Change	-86.62%	-58.81%	1470.94%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$62.83M
YoY Change		35.22%
Debt Paid & Issued, Net		$6.929M
YoY Change		33.3%
Cash From Financing Activities	-36.64M	-$116.8M	-8.400M
YoY Change	336.25%	33.95%	-82.89%
NET CHANGE
Cash From Operating Activities	254.9M	$541.6M	187.3M
Cash From Investing Activities	-24.60M	-$90.72M	-183.8M
Cash From Financing Activities	-36.64M	-$116.8M	-8.400M
Net Change In Cash	193.6M	$333.9M	-4.900M
YoY Change	-4051.96%	80.93%	-102.73%
FREE CASH FLOW
Cash From Operating Activities	$254.9M	$541.6M	$187.3M
Capital Expenditures	-$12.26M	$79.55M	-$21.40M
Free Cash Flow	$267.2M	$462.1M	$208.7M
YoY Change	28.01%	12.44%	-17.67%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000936395
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
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CY2020Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherLiabilitiesNoncurrent
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CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-10-30
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--10-30
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-36250
CY2021	dei	Entity Registrant Name EntityRegistrantName	Ciena Corp
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	7035 Ridge Road
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Hanover
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	MD
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	23-2725311
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	21076
CY2021	dei	City Area Code CityAreaCode	410
CY2021	dei	Local Phone Number LocalPhoneNumber	694-5700
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value
CY2021	dei	Trading Symbol TradingSymbol	CIEN
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2019	cien	Gain Loss On Extinguishment And Restructuring Of Debt GainLossOnExtinguishmentAndRestructuringOfDebt	0	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	462751000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	455961000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	313190000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-37445000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	94670000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	59756000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	500196000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	361291000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	253434000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.22
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.34
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.63
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.19
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.32
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.61
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	155279000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	154287000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	155720000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	156743000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	155955000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	157612000	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	500196000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	361291000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	253434000	USD
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-209000	USD
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-107000	USD
CY2019	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	577000	USD
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	20215000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-4174000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-763000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	35797000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-13274000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-16304000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	535993000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	348017000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	237130000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1929334000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	253434000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-16304000	USD
CY2019	cien	Stock Repurchased During Period Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Value StockRepurchasedDuringPeriodExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationValue	150076000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	22947000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	59736000	USD
CY2019	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	52944000	USD
CY2019	cien	Stock Repurchased During Period Shares Purchased For Tax Withholdings For Share Based Compensation Value StockRepurchasedDuringPeriodSharesPurchasedForTaxWithholdingsForShareBasedCompensationValue	29059000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	2172761000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	361291000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-13274000	USD
CY2020	cien	Stock Repurchased During Period Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Value StockRepurchasedDuringPeriodExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationValue	74535000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	28068000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	67758000	USD
CY2020	cien	Stock Repurchased During Period Shares Purchased For Tax Withholdings For Share Based Compensation Value StockRepurchasedDuringPeriodSharesPurchasedForTaxWithholdingsForShareBasedCompensationValue	32472000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	2509597000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	500196000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	35797000	USD
CY2021	cien	Stock Repurchased During Period Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Value StockRepurchasedDuringPeriodExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationValue	92088000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	28457000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	84336000	USD
CY2021	cien	Stock Repurchased During Period Shares Purchased For Tax Withholdings For Share Based Compensation Value StockRepurchasedDuringPeriodSharesPurchasedForTaxWithholdingsForShareBasedCompensationValue	44071000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	3020018000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	500196000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	361291000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	253434000	USD
CY2021	us-gaap	Depreciation Depreciation	96233000	USD
CY2020	us-gaap	Depreciation Depreciation	93908000	USD
CY2019	us-gaap	Depreciation Depreciation	87576000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	84336000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	67758000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	59736000	USD
CY2021	cien	Amortization Of Intangible Assets Excluding Amortization Included In Property Plant And Equipment AmortizationOfIntangibleAssetsExcludingAmortizationIncludedInPropertyPlantAndEquipment	36033000	USD
CY2020	cien	Amortization Of Intangible Assets Excluding Amortization Included In Property Plant And Equipment AmortizationOfIntangibleAssetsExcludingAmortizationIncludedInPropertyPlantAndEquipment	38619000	USD
CY2019	cien	Amortization Of Intangible Assets Excluding Amortization Included In Property Plant And Equipment AmortizationOfIntangibleAssetsExcludingAmortizationIncludedInPropertyPlantAndEquipment	35136000	USD
CY2021	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-156469000	USD
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	64339000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	19865000	USD
CY2021	us-gaap	Inventory Write Down InventoryWriteDown	17850000	USD
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	24701000	USD
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	28085000	USD
CY2021	us-gaap	Product Warranty Expense ProductWarrantyExpense	17093000	USD
CY2020	us-gaap	Product Warranty Expense ProductWarrantyExpense	22417000	USD
CY2019	us-gaap	Product Warranty Expense ProductWarrantyExpense	23105000	USD
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-14525000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-20483000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-5830000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	174377000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	17299000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-65712000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	47567000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	25044000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	112941000	USD
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	19691000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	38998000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	96618000	USD
CY2021	cien	Increase Decrease In Operating Lease Right Of Use Assets IncreaseDecreaseInOperatingLeaseRightOfUseAssets	-16632000	USD
CY2020	cien	Increase Decrease In Operating Lease Right Of Use Assets IncreaseDecreaseInOperatingLeaseRightOfUseAssets	-16787000	USD
CY2019	cien	Increase Decrease In Operating Lease Right Of Use Assets IncreaseDecreaseInOperatingLeaseRightOfUseAssets	0	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	162134000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-117931000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	27740000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	16822000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	2519000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	16480000	USD
CY2021	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-22104000	USD
CY2020	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-19896000	USD
CY2019	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	541646000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	493654000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	413140000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	79550000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	82667000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	62579000	USD
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	172778000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	223196000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	158074000	USD
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	152253000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	110390000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	248748000	USD
CY2021	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	4678000	USD
CY2020	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	0	USD
CY2019	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	0	USD
CY2021	cien	Payments To Acquire Equity Securities Without Readily Determinable Fair Value PaymentsToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue	0	USD
CY2020	cien	Payments To Acquire Equity Securities Without Readily Determinable Fair Value PaymentsToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue	0	USD
CY2019	cien	Payments To Acquire Equity Securities Without Readily Determinable Fair Value PaymentsToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue	2667000	USD
CY2021	us-gaap	Payments For Proceeds From Derivative Instrument Investing Activities PaymentsForProceedsFromDerivativeInstrumentInvestingActivities	-4680000	USD
CY2020	us-gaap	Payments For Proceeds From Derivative Instrument Investing Activities PaymentsForProceedsFromDerivativeInstrumentInvestingActivities	-3531000	USD
CY2019	us-gaap	Payments For Proceeds From Derivative Instrument Investing Activities PaymentsForProceedsFromDerivativeInstrumentInvestingActivities	1351000	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	28300000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-90717000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-220242000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	24077000	USD
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	6929000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	5198000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	7000000	USD
CY2021	cien	Repayments Of Convertible Debt Embedded Derivative RepaymentsOfConvertibleDebtEmbeddedDerivative	0	USD
CY2020	cien	Repayments Of Convertible Debt Embedded Derivative RepaymentsOfConvertibleDebtEmbeddedDerivative	0	USD
CY2019	cien	Repayments Of Convertible Debt Embedded Derivative RepaymentsOfConvertibleDebtEmbeddedDerivative	111268000	USD
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	382000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1191000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3004000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	2703000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3319000	USD
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	44071000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	32472000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	29059000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	91288000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	74535000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	150076000	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	28457000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	28068000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	22947000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-116835000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-87222000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-278966000	USD
CY2021	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-198000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-1643000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	476000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	333896000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	184547000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	158727000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1088708000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	904161000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	745434000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1422604000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1088708000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	904161000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	29864000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	32837000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	39579000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	73127000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	53076000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	33570000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	24058000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	22089000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	0	USD
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	10138000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	7854000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	16549000	USD
CY2021	cien	Repurchase Of Common Stock In Accrued Liabilities From Repurchase Program RepurchaseOfCommonStockInAccruedLiabilitiesFromRepurchaseProgram	800000	USD
CY2020	cien	Repurchase Of Common Stock In Accrued Liabilities From Repurchase Program RepurchaseOfCommonStockInAccruedLiabilitiesFromRepurchaseProgram	0	USD
CY2019	cien	Repurchase Of Common Stock In Accrued Liabilities From Repurchase Program RepurchaseOfCommonStockInAccruedLiabilitiesFromRepurchaseProgram	0	USD
CY2021	us-gaap	Debt Conversion Converted Instrument Shares Issued1 DebtConversionConvertedInstrumentSharesIssued1	1585140	shares
CY2021	us-gaap	Debt Conversion Original Debt Amount1 DebtConversionOriginalDebtAmount1	0	USD
CY2020	us-gaap	Debt Conversion Original Debt Amount1 DebtConversionOriginalDebtAmount1	0	USD
CY2019	us-gaap	Debt Conversion Original Debt Amount1 DebtConversionOriginalDebtAmount1	52944000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4356000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	24160000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2021	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	0	USD
CY2020	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	2681000	USD
CY2019	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	0	USD
CY2021	us-gaap	Fiscal Period FiscalPeriod	Ciena has a 52 or 53-week fiscal year, which ends on the Saturday nearest to the last day of October in each year (October 30, 2021, October 31, 2020 and November 2, 2019 for the periods reported). Fiscal 2021, fiscal 2020 and fiscal 2019 each consisted of a 52-week fiscal year.
CY2021	us-gaap	Use Of Estimates UseOfEstimates	The preparation of the financial statements and related disclosures in conformity with Generally Accepted Accounting Principles (“GAAP”) requires management to make estimates and judgments that affect the amounts reported in the consolidated financial statements and accompanying notes. Estimates are used for selling prices for multiple element arrangements, shared-based compensation, bad debts, valuation of inventories and investments, recoverability of intangible assets, other long-lived assets and goodwill, income taxes, warranty obligations, restructuring liabilities, derivatives, contingencies and litigation. Ciena bases its estimates on historical experience and assumptions that it believes are reasonable. Actual results may differ materially from management’s estimates.
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	8600000	USD
CY2021	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P7Y
CY2021	cien	Maintenance Spare Parts Amortization Period MaintenanceSparePartsAmortizationPeriod	P4Y
CY2021Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	475000000	USD
CY2021Q4	us-gaap	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries	32000000	USD
CY2021	cien	One Time Employee Termination Benefits Related Service Period OneTimeEmployeeTerminationBenefitsRelatedServicePeriod	P60D
CY2021	us-gaap	Revenues Revenues	3620684000	USD
CY2021	us-gaap	Revenues Revenues	3620684000	USD
CY2020	us-gaap	Revenues Revenues	3532157000	USD
CY2020	us-gaap	Revenues Revenues	3532157000	USD
CY2019	us-gaap	Revenues Revenues	3572131000	USD
CY2019	us-gaap	Revenues Revenues	3572131000	USD
CY2021	us-gaap	Revenues Revenues	3620684000	USD
CY2020	us-gaap	Revenues Revenues	3532157000	USD
CY2019	us-gaap	Revenues Revenues	3572131000	USD
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	884958000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	719405000	USD
CY2021Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	101355000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	85843000	USD
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	175464000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	158363000	USD
CY2021	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	106500000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	101900000	USD
CY2021Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	27600000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	15300000	USD
CY2021	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	24600000	USD
CY2020	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	22400000	USD
CY2021Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1600000000	USD
CY2021Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.85
CY2021Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-9800000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	3847000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	24538000	USD
CY2019	us-gaap	Payments For Restructuring PaymentsForRestructuring	13242000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	15143000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	22652000	USD
CY2020	us-gaap	Payments For Restructuring PaymentsForRestructuring	23720000	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	2915000	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	29565000	USD
CY2021	us-gaap	Payments For Restructuring PaymentsForRestructuring	31699000	USD
CY2021Q4	us-gaap	Restructuring Reserve RestructuringReserve	781000	USD
CY2021Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	781000	USD
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	2051000	USD
CY2020	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	6860000	USD
CY2019	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	14410000	USD
CY2021	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	11172000	USD
CY2020	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	5551000	USD
CY2019	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	3000	USD
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-14622000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-13022000	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-369000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1575000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-737000	USD
CY2021	cien	Interest And Other Income Loss Net InterestAndOtherIncomeLossNet	-1768000	USD
CY2020	cien	Interest And Other Income Loss Net InterestAndOtherIncomeLossNet	964000	USD
CY2019	cien	Interest And Other Income Loss Net InterestAndOtherIncomeLossNet	3876000	USD
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-14600000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-13000000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-9800000	USD
CY2021	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	11200000	USD
CY2020	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	5600000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	181488000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	181483000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	70225000	USD
CY2021Q4	us-gaap	Other Inventory Capitalized Costs OtherInventoryCapitalizedCosts	44765000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	70038000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	251713000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	251521000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	17378000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	6740000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	4017000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	20101000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	20101000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	8855000	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	18358000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	10598000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	10598000	USD
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2346000	USD
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	4238000	USD
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	10912000	USD
CY2021Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	175399000	USD
CY2020Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	119481000	USD
CY2021Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	10260000	USD
CY2020Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	13738000	USD
CY2021Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	180800000	USD
CY2020Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	210050000	USD
CY2020Q4	us-gaap	Other Inventory Capitalized Costs OtherInventoryCapitalizedCosts	40747000	USD
CY2021Q4	us-gaap	Inventory Gross InventoryGross	411224000	USD
CY2020Q4	us-gaap	Inventory Gross InventoryGross	384016000	USD
CY2021Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	36959000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	39637000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	374265000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	344379000	USD
CY2021	us-gaap	Inventory Write Down InventoryWriteDown	17900000	USD
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	24700000	USD
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	28100000	USD
CY2018Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	50938000	USD
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	28085000	USD
CY2019	cien	Inventory Valuation Reserves Disposals InventoryValuationReservesDisposals	31701000	USD
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	47322000	USD
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	47322000	USD
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	24701000	USD
CY2020	cien	Inventory Valuation Reserves Disposals InventoryValuationReservesDisposals	32386000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	39637000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	39637000	USD
CY2021	us-gaap	Inventory Write Down InventoryWriteDown	17850000	USD
CY2021	cien	Inventory Valuation Reserves Disposals InventoryValuationReservesDisposals	20528000	USD
CY2021Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	36959000	USD
CY2021Q4	us-gaap	Prepaid Taxes PrepaidTaxes	77388000	USD
CY2020Q4	us-gaap	Prepaid Taxes PrepaidTaxes	72838000	USD
CY2021Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	62189000	USD
CY2020Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	70647000	USD
CY2021Q4	cien	Product Demonstration Equipment Net ProductDemonstrationEquipmentNet	29362000	USD
CY2020Q4	cien	Product Demonstration Equipment Net ProductDemonstrationEquipmentNet	44793000	USD
CY2021Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	18408000	USD
CY2020Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	21981000	USD
CY2021Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	14935000	USD
CY2020Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	82000	USD
CY2021Q4	us-gaap	Deferred Costs Current DeferredCostsCurrent	264000	USD
CY2020Q4	us-gaap	Deferred Costs Current DeferredCostsCurrent	604000	USD
CY2021Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	325654000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	308084000	USD
CY2021	cien	Depreciation Of Product Demonstration Equipment DepreciationOfProductDemonstrationEquipment	9800000	USD
CY2020	cien	Depreciation Of Product Demonstration Equipment DepreciationOfProductDemonstrationEquipment	9000000	USD
CY2019	cien	Depreciation Of Product Demonstration Equipment DepreciationOfProductDemonstrationEquipment	8800000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	776065000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	683429000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	491097000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	411052000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	284968000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	272377000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	778870000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	713556000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	65314000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	773950000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	677303000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	96647000	USD
CY2021	cien	Amortization Of Intangible Assets Excluding Amortization Included In Property Plant And Equipment AmortizationOfIntangibleAssetsExcludingAmortizationIncludedInPropertyPlantAndEquipment	36000000	USD
CY2020	cien	Amortization Of Intangible Assets Excluding Amortization Included In Property Plant And Equipment AmortizationOfIntangibleAssetsExcludingAmortizationIncludedInPropertyPlantAndEquipment	38600000	USD
CY2019	cien	Amortization Of Intangible Assets Excluding Amortization Included In Property Plant And Equipment AmortizationOfIntangibleAssetsExcludingAmortizationIncludedInPropertyPlantAndEquipment	35100000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	29935000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	15125000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	12074000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	6865000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	607000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	708000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	65314000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	310847000	USD
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2021	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	798000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	311645000	USD
CY2020Q4	cien	Maintenance Spares Inventory Net Non Current MaintenanceSparesInventoryNetNonCurrent	62077000	USD
CY2021Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	12968000	USD
CY2020Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	8213000	USD
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	8578000	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	13408000	USD
CY2021Q4	us-gaap	Capitalized Contract Cost Net Noncurrent CapitalizedContractCostNetNoncurrent	5803000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net Noncurrent CapitalizedContractCostNetNoncurrent	4001000	USD
CY2021Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	1188000	USD
CY2020Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	1596000	USD
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	58000	USD
CY2020Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	84000	USD
CY2021Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	15600000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	13451000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	99891000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	102830000	USD
CY2021Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	201119000	USD
CY2020Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	135462000	USD
CY2021Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	48019000	USD
CY2020Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	49868000	USD
CY2021Q4	us-gaap	Accrued Vacation Current AccruedVacationCurrent	31200000	USD
CY2020Q4	us-gaap	Accrued Vacation Current AccruedVacationCurrent	26945000	USD
CY2021Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	13577000	USD
CY2020Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	6348000	USD
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	3620000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	2836000	USD
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	598000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	672000	USD
CY2021Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	111152000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	112001000	USD
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	409285000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	334132000	USD
CY2018Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	44740000	USD
CY2019	us-gaap	Product Warranty Expense ProductWarrantyExpense	23105000	USD
CY2019	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	19347000	USD
CY2019Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	48498000	USD
CY2019Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	48498000	USD
CY2020	us-gaap	Product Warranty Expense ProductWarrantyExpense	22417000	USD
CY2020	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	21047000	USD
CY2020Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	49868000	USD
CY2020Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	49868000	USD
CY2021	us-gaap	Product Warranty Expense ProductWarrantyExpense	17093000	USD
CY2021	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	18942000	USD
CY2021Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	48019000	USD
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	175464000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	158363000	USD
CY2021Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	118007000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	108700000	USD
CY2021Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	57457000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	49663000	USD
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	62583000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	61565000	USD
CY2021Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	15928000	USD
CY2020Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	28513000	USD
CY2021Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	63412000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	16386000	USD
CY2021Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	12877000	USD
CY2020Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	8172000	USD
CY2021Q4	cien	Other Obligations Noncurrent OtherObligationsNoncurrent	12003000	USD
CY2020Q4	cien	Other Obligations Noncurrent OtherObligationsNoncurrent	8549000	USD
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	166803000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	123185000	USD
CY2019	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-19120000	USD
CY2019	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-2816000	USD
CY2020	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-20474000	USD
CY2020	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-7200000	USD
CY2021	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	36601000	USD
CY2021	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	804000	USD
CY2021Q4	cien	Lessee Operating Lease Area Of Property Leased LesseeOperatingLeaseAreaOfPropertyLeased	1300000	sqft
CY2021	cien	Lease Remaining Lease Term LeaseRemainingLeaseTerm	P11Y
CY2021	cien	Lessee Lease Renewal Term LesseeLeaseRenewalTerm	P10Y
CY2021	cien	Lessee Lease Termination Period LesseeLeaseTerminationPeriod	P5Y
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	44285000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	57026000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	60196000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	80450000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	76123000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	70791000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	24027000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	17837000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	52096000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	52954000	USD
CY2021Q4	cien	Lessee Operating Lease Right Of Use Asset Subleased Or Vacant LesseeOperatingLeaseRightOfUseAssetSubleasedOrVacant	3500000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	16602000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	17544000	USD
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	4773000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	4465000	USD
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	4882000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	4777000	USD
CY2021	cien	Finance Lease Cost FinanceLeaseCost	9655000	USD
CY2020	cien	Finance Lease Cost FinanceLeaseCost	9242000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1152000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2976000	USD
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	5690000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	5185000	USD
CY2021	us-gaap	Lease Cost LeaseCost	33099000	USD
CY2020	us-gaap	Lease Cost LeaseCost	34947000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	19882000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	8338000	USD
CY2021Q4	cien	Lease Liability Payment Due Year One LeaseLiabilityPaymentDueYearOne	28220000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	15153000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	8557000	USD
CY2021Q4	cien	Lease Liability Payment Due Year Two LeaseLiabilityPaymentDueYearTwo	23710000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	12264000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	8557000	USD
CY2021Q4	cien	Lease Liability Payment Due Year Three LeaseLiabilityPaymentDueYearThree	20821000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	7935000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	8730000	USD
CY2021Q4	cien	Lease Liability Payment Due Year Four LeaseLiabilityPaymentDueYearFour	16665000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	8764000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4408000	USD
CY2021Q4	cien	Lease Liability Payment Due Year Five LeaseLiabilityPaymentDueYearFive	13172000	USD
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	62583000	USD
CY2021Q4	cien	Lease Liability Noncurrent LeaseLiabilityNoncurrent	104147000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y21D
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	3860000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	53714000	USD
CY2021Q4	cien	Lease Liability Payment Due After Year Five LeaseLiabilityPaymentDueAfterYearFive	57574000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	63502000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	96660000	USD
CY2021Q4	cien	Lease Liability Payment Due LeaseLiabilityPaymentDue	160162000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3306000	USD
CY2021Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	30457000	USD
CY2021Q4	cien	Lease Liability Undiscounted Excess Amount LeaseLiabilityUndiscountedExcessAmount	33763000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	60196000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	66203000	USD
CY2021Q4	cien	Lease Liability LeaseLiability	126399000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	18632000	USD
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	3620000	USD
CY2021Q4	cien	Lease Liability Current LeaseLiabilityCurrent	22252000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	41564000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	500196000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	361291000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y10M13D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P10Y8M15D
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P11Y8M15D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0249
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0282
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0756
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0756
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	683286000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	253434000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	155279000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	154287000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	155720000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1464000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1668000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1892000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	156743000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	155955000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	157612000	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.22
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.34
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.63
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.19
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.32
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.61
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	110000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	263000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	234000	shares
CY2018Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	500000000	USD
CY2019Q4	cien	Cumulative Shares Repurchased Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Shares CumulativeSharesRepurchasedExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationShares	3838466000	shares
CY2019Q4	cien	Cumulative Shares Repurchased Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Weighted Average Price Per Share CumulativeSharesRepurchasedExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationWeightedAveragePricePerShare	39.10
CY2019Q4	cien	Cumulative Shares Repurchased Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Value CumulativeSharesRepurchasedExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationValue	150076000	USD
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	1872446000	shares
CY2020	cien	Shares Repurchased During Period Weighted Average Price Per Share SharesRepurchasedDuringPeriodWeightedAveragePricePerShare	39.81
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	74535000	USD
CY2020Q4	cien	Cumulative Shares Repurchased Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Shares CumulativeSharesRepurchasedExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationShares	5710912000	shares
CY2020Q4	cien	Cumulative Shares Repurchased Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Weighted Average Price Per Share CumulativeSharesRepurchasedExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationWeightedAveragePricePerShare	39.33
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	21400000	USD
CY2020Q4	cien	Cumulative Shares Repurchased Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Value CumulativeSharesRepurchasedExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationValue	224611000	USD
CY2021	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	1696949000	shares
CY2021	cien	Shares Repurchased During Period Weighted Average Price Per Share SharesRepurchasedDuringPeriodWeightedAveragePricePerShare	54.27
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	92088000	USD
CY2021Q4	cien	Cumulative Shares Repurchased Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Shares CumulativeSharesRepurchasedExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationShares	7407861000	shares
CY2021Q4	cien	Cumulative Shares Repurchased Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Weighted Average Price Per Share CumulativeSharesRepurchasedExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationWeightedAveragePricePerShare	42.75
CY2021Q4	cien	Cumulative Shares Repurchased Excluding Shares Purchased For Tax Withholdings For Share Based Compensation Value CumulativeSharesRepurchasedExcludingSharesPurchasedForTaxWithholdingsForShareBasedCompensationValue	316699000	USD
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	44100000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	72603000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	4363000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	13143000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	13328000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	16945000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	25021000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	12640000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	9816000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	119024000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	30331000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	39904000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-21942000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	60679000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	31872000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-11546000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	4607000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-9159000	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-122981000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-947000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-2861000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-156469000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	64339000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	19852000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-37445000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	94670000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	59756000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	298514000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	387697000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	256461000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	164237000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	68264000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	56729000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.0051
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	462751000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	455961000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	313190000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2021	cien	Effective Income Tax Rate Reconciliation Intercompany Ip Restructuring Transaction Percent EffectiveIncomeTaxRateReconciliationIntercompanyIPRestructuringTransactionPercent	-0.2585
CY2020	cien	Effective Income Tax Rate Reconciliation Intercompany Ip Restructuring Transaction Percent EffectiveIncomeTaxRateReconciliationIntercompanyIPRestructuringTransactionPercent	0
CY2019	cien	Effective Income Tax Rate Reconciliation Intercompany Ip Restructuring Transaction Percent EffectiveIncomeTaxRateReconciliationIntercompanyIPRestructuringTransactionPercent	0
CY2021	cien	Effective Income Tax Rate Reconciliation Base Erosion And Anti Abuse Tax Percent EffectiveIncomeTaxRateReconciliationBaseErosionAndAntiAbuseTaxPercent	0
CY2020	cien	Effective Income Tax Rate Reconciliation Base Erosion And Anti Abuse Tax Percent EffectiveIncomeTaxRateReconciliationBaseErosionAndAntiAbuseTaxPercent	-0.0102
CY2019	cien	Effective Income Tax Rate Reconciliation Base Erosion And Anti Abuse Tax Percent EffectiveIncomeTaxRateReconciliationBaseErosionAndAntiAbuseTaxPercent	0.0360
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0373
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0221
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0218
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.0276
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	33017000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	959814000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.0177
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0037
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0799
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0774
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.0753
CY2021	cien	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost And Other Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCostAndOtherPercent	0.0168
CY2020	cien	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost And Other Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCostAndOtherPercent	0.0179
CY2019	cien	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost And Other Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCostAndOtherPercent	0.0101
CY2021	cien	Effective Income Tax Rate Reconciliation Foreign Derived Intangible Income Percent EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent	-0.0182
CY2020	cien	Effective Income Tax Rate Reconciliation Foreign Derived Intangible Income Percent EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent	-0.0207
CY2019	cien	Effective Income Tax Rate Reconciliation Foreign Derived Intangible Income Percent EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent	0
CY2021	cien	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Transition Tax On Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActTransitionTaxOnAccumulatedForeignEarningsPercent	0
CY2020	cien	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Transition Tax On Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActTransitionTaxOnAccumulatedForeignEarningsPercent	0.0002
CY2019	cien	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Transition Tax On Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActTransitionTaxOnAccumulatedForeignEarningsPercent	0.0029
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.0433
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.0304
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.0041
CY2021Q4	cien	Deferred Tax Asset Operating Loss And Tax Credit Carryforwards DeferredTaxAssetOperatingLossAndTaxCreditCarryforwards	165087000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.0358
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.0213
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.0096
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.0056
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.0144
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.0809
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.2076
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.1908
CY2021	cien	Effective Income Tax Rate Reconciliation Intra Entity Transfer Of Foreign Intellectual Property Rights Amount EffectiveIncomeTaxRateReconciliationIntraEntityTransferOfForeignIntellectualPropertyRightsAmount	-119300000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	69950000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	73825000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	677729000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	504233000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	47048000	USD
CY2020Q4	cien	Deferred Tax Asset Operating Loss And Tax Credit Carryforwards DeferredTaxAssetOperatingLossAndTaxCreditCarryforwards	188157000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	799232000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	159634000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	151427000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	800180000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	647805000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	96363000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1959000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1224000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2494000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	94604000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	653000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1151000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	660000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	142650000	USD
CY2019	cien	Valuation Allowance Deferred Tax Asset Additions ValuationAllowanceDeferredTaxAssetAdditions	27459000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	95748000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	22854000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	654000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	5510000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	659000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	77091000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	3800000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	3900000	USD
CY2021	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	100000	USD
CY2019	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	1000000	USD
CY2020	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	900000	USD
CY2021Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	475000000	USD
CY2021Q4	us-gaap	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries	32000000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	159600000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	107000	shares
CY2019	cien	Valuation Allowance Deferred Tax Asset Deductions ValuationAllowanceDeferredTaxAssetDeductions	34131000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	135978000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	135978000	USD
CY2020	cien	Valuation Allowance Deferred Tax Asset Additions ValuationAllowanceDeferredTaxAssetAdditions	25749000	USD
CY2020	cien	Valuation Allowance Deferred Tax Asset Deductions ValuationAllowanceDeferredTaxAssetDeductions	10300000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	151427000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	151427000	USD
CY2021	cien	Valuation Allowance Deferred Tax Asset Additions ValuationAllowanceDeferredTaxAssetAdditions	17897000	USD
CY2021	cien	Valuation Allowance Deferred Tax Asset Deductions ValuationAllowanceDeferredTaxAssetDeductions	9690000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	159634000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	31.41
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	19000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	30.13
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	5000	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	18.22
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	83000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	32.46
CY2021	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	-72000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	118000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	57000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	84336000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	67758000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	59736000	USD
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	143300000	USD
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	285000000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	44300000	USD
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	65314000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	311645000	USD
CY2021Q4	cien	Maintenance Spares Inventory Net Non Current MaintenanceSparesInventoryNetNonCurrent	55696000	USD
CY2021	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	452214000	USD
CY2020	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	416425000	USD
CY2019	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	423046000	USD
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	181874000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	169548000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	174399000	USD
CY2021	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	29565000	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	22652000	USD
CY2019	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	24538000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	23732000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	23383000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21808000	USD
CY2021	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	2572000	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	4031000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	3370000	USD
CY2021	cien	Interest And Other Income Loss Net InterestAndOtherIncomeLossNet	-1768000	USD
CY2020	cien	Interest And Other Income Loss Net InterestAndOtherIncomeLossNet	964000	USD
CY2019	cien	Interest And Other Income Loss Net InterestAndOtherIncomeLossNet	3876000	USD
CY2021	us-gaap	Interest Expense InterestExpense	30837000	USD
CY2020	us-gaap	Interest Expense InterestExpense	31321000	USD
CY2019	us-gaap	Interest Expense InterestExpense	37452000	USD
CY2021	cien	Gain Loss On Extinguishment And Restructuring Of Debt GainLossOnExtinguishmentAndRestructuringOfDebt	0	USD
CY2020	cien	Gain Loss On Extinguishment And Restructuring Of Debt GainLossOnExtinguishmentAndRestructuringOfDebt	-646000	USD
CY2019	cien	Gain Loss On Extinguishment And Restructuring Of Debt GainLossOnExtinguishmentAndRestructuringOfDebt	0	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-37445000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	94670000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	59756000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	500196000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	361291000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	253434000	USD
CY2021Q4	cien	Property Plant And Equipment Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization And Operating Lease Right Of Use Asset PropertyPlantAndEquipmentFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortizationAndOperatingLeaseRightOfUseAsset	329253000	USD
CY2020Q4	cien	Property Plant And Equipment Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization And Operating Lease Right Of Use Asset PropertyPlantAndEquipmentFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortizationAndOperatingLeaseRightOfUseAsset	329403000	USD
CY2018Q4	cien	Government Grants Maximum Amount GovernmentGrantsMaximumAmount	57600000	CAD
CY2018Q4	cien	Government Grants Maximum Amount GovernmentGrantsMaximumAmount	46500000	USD
CY2018	cien	Government Grants Number Of Counterparties GovernmentGrantsNumberOfCounterparties	3	government_entity
CY2021Q4	us-gaap	Grants Receivable GrantsReceivable	6100000	CAD
CY2021Q4	us-gaap	Grants Receivable GrantsReceivable	4900000	USD

Files In Submission

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$CIEN
CIENA CORP Stock $cien

2021 Q4 Form 10-K Financial Statement

#000093639521000054 Filed on December 17, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CIEN CIENA CORP Stock $cien

2021 Q4 Form 10-K Financial Statement

#000093639521000054 Filed on December 17, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CIEN
CIENA CORP Stock $cien