XML 71 R60.htm IDEA: XBRL DOCUMENT
v3.21.1

Fair Value Measurements - Condensed Consolidated Balance Sheet (Details) - Fair value, Measurements, Recurring - USD ($) $ in Thousands | May 01, 2021 | Oct. 31, 2020
--- | --- | ---
Assets: |  |
Total assets measured at fair value | $ 1,307,906 | $ 1,180,842
Liabilities: |  |
Total liabilities measured at fair value | 23,079 | 29,194
Cash equivalents |  |
Assets: |  |
Cash equivalents | 1,038,791 | 939,654
Short-term investments |  |
Assets: |  |
Short-term investments | 151,816 | 150,667
Prepaid expenses and other |  |
Assets: |  |
Other assets | 13,785 | 82
Long-term investments |  |
Assets: |  |
Long-term investments | 91,715 |
Other long-term assets |  |
Assets: |  |
Other assets | 11,799 | 90,439
Accrued liabilities and other short-term obligations |  |
Liabilities: |  |
Accrued liabilities and other short-term obligations | 285 | 681
Other long-term obligations |  |
Liabilities: |  |
Other long-term obligations | 22,794 | 28,513
Level 1 |  |
Assets: |  |
Total assets measured at fair value | 1,050,590 | 947,867
Liabilities: |  |
Total liabilities measured at fair value | 0 | 0
Level 1 | Cash equivalents |  |
Assets: |  |
Cash equivalents | 1,038,791 | 939,654
Level 1 | Short-term investments |  |
Assets: |  |
Short-term investments | 0 | 0
Level 1 | Prepaid expenses and other |  |
Assets: |  |
Other assets | 0 | 0
Level 1 | Long-term investments |  |
Assets: |  |
Long-term investments | 0 |
Level 1 | Other long-term assets |  |
Assets: |  |
Other assets | 11,799 | 8,213
Level 1 | Accrued liabilities and other short-term obligations |  |
Liabilities: |  |
Accrued liabilities and other short-term obligations | 0 | 0
Level 1 | Other long-term obligations |  |
Liabilities: |  |
Other long-term obligations | 0 | 0
Level 2 |  |
Assets: |  |
Total assets measured at fair value | 257,316 | 232,975
Liabilities: |  |
Total liabilities measured at fair value | 23,079 | 29,194
Level 2 | Cash equivalents |  |
Assets: |  |
Cash equivalents | 0 | 0
Level 2 | Short-term investments |  |
Assets: |  |
Short-term investments | 151,816 | 150,667
Level 2 | Prepaid expenses and other |  |
Assets: |  |
Other assets | 13,785 | 82
Level 2 | Long-term investments |  |
Assets: |  |
Long-term investments | 91,715 |
Level 2 | Other long-term assets |  |
Assets: |  |
Other assets | 0 | 82,226
Level 2 | Accrued liabilities and other short-term obligations |  |
Liabilities: |  |
Accrued liabilities and other short-term obligations | 285 | 681
Level 2 | Other long-term obligations |  |
Liabilities: |  |
Other long-term obligations | 22,794 | 28,513
Level 3 |  |
Assets: |  |
Total assets measured at fair value | 0 | 0
Liabilities: |  |
Total liabilities measured at fair value | 0 | 0
Level 3 | Cash equivalents |  |
Assets: |  |
Cash equivalents | 0 | 0
Level 3 | Short-term investments |  |
Assets: |  |
Short-term investments | 0 | 0
Level 3 | Prepaid expenses and other |  |
Assets: |  |
Other assets | 0 | 0
Level 3 | Long-term investments |  |
Assets: |  |
Long-term investments | 0 |
Level 3 | Other long-term assets |  |
Assets: |  |
Other assets | 0 | 0
Level 3 | Accrued liabilities and other short-term obligations |  |
Liabilities: |  |
Accrued liabilities and other short-term obligations | 0 | 0
Level 3 | Other long-term obligations |  |
Liabilities: |  |
Other long-term obligations | $ 0 | $ 0

X
- Definition Long Term Investments, Fair Value Disclosure + References No definition available. + Details
Name: | cien_LongTermInvestmentsFairValueDisclosure
Namespace Prefix: | cien_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of accrued expenses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_AccruedLiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value portion of other assets. + References No definition available. + Details
Name: | us-gaap_OtherAssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of other liabilities. + References No definition available. + Details
Name: | us-gaap_OtherLiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_ShortTermInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=cien_MarketableSecuritiesNoncurrentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_AccruedLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=cien_OtherLongTermLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |