Accretion Rate of Principal Amount

No definition available.

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Namespace Prefix:	cien_
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Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Convertible, Fair Value of Debt Component

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Minimum percentage of aggregate principal amount required to be held by trustee or holders to declare notes immediately payable, if an event of default occurs and is continuing.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Debt Instrument Principal Amount Denomination for Conversion Into Common Stock

+ References

No definition available.

+ Details

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Namespace Prefix:	cien_
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Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Redemption Option, Common Stock Closing Price as Percentage of Conversion Price, Minimum

+ References

No definition available.

+ Details

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Namespace Prefix:	cien_
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Balance Type:	na
Period Type:	duration

- Definition

Debt instrument redemption minimum number of trading days in 30 consecutive trading day period prior to the date of redemption notice where closing sale price exceeds conversion price by a minimum percentage.

+ References

No definition available.

+ Details

Name:	cien_DebtInstrumentRedemptionOptionMinimumNumberOfTradingDaysInThirtyConsecutiveDayPeriodPriorToDateOfRedemptionNoticeClosingPriceExceedsConversionPrice
Namespace Prefix:	cien_
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Balance Type:	na
Period Type:	duration

- Definition

Debt instrument redemption number of consecutive trading day period prior to the date of redemption notice where closing sale price exceeds conversion price by a minimum percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	cien_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

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- Definition

The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

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-Paragraph 4

-Subparagraph (a)

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-Subparagraph a

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+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

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-Paragraph 5

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+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The ratio applied to the debt for purposes of determining the number of shares of the equity security into which the debt will be converted.

+ References

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-Name Accounting Standards Codification

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-Glossary Conversion Rate

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-Number 129

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

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-Subparagraph (SX 210.5-02.22(a)(5))

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- Definition

The effective interest rate on the liability component of convertible debt instrument which may be settled in cash upon conversion, including partial cash settlement.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 6

-Subparagraph (a)

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-Name FASB Staff Position (FSP)

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-Subparagraph a

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+ Details

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- Definition

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

+ References

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-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

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-Paragraph 10

-Subparagraph (a)

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+ Details

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- Definition

Interest rate stated in the contractual debt agreement.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

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-Name Accounting Standards Codification

-Topic 210

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-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Details

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- Definition

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44B

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-Name Statement of Financial Accounting Standard (FAS)

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 26

-Paragraph 20, 21

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-Name Accounting Standards Codification

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-Subparagraph (b)

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

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-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

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Convertible Notes Payable - Private Exchange Offer Transactions (Details) (USD $)	3 Months Ended		6 Months Ended			0 Months Ended	3 Months Ended		0 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013 4.0% Convertible Senior Notes due December 15, 2020 [Member]	Dec. 27, 2012 Convertible Notes Payable [Member] 4.0% Convertible Senior Notes due December 15, 2020 [Member] D	Jan. 31, 2013 Convertible Notes Payable [Member] 4.0% Convertible Senior Notes due December 15, 2020 [Member]	Apr. 30, 2013 Convertible Notes Payable [Member] 4.0% Convertible Senior Notes due December 15, 2020 [Member]	Dec. 27, 2012 4.0% Convertible Senior Notes due March 15, 2015 [Member] Convertible Notes Payable [Member]
Debt Instrument [Line Items]
Principal amount of new series of convertible notes						$ 187,500,000
Interest rate on convertible notes					4.00%	4.00%
Retired principal amount									187,500,000
Retirement of outstanding notes, carrying value									187,900,000
Convertible notes issuance costs									2,300,000
Convertible notes redemption feature									600,000
Convertible notes fair value						213,600,000
Loss on extinguishment of debt	0	0	28,630,000	0			28,630,000
Accretion rate of principal amount						1.85%
Number of shares converted for each $1000 principal amount (in shares)						49.0557
Principal amount used for conversion of notes						1,000
Initial conversion price per share equivalent						$ 20.385
Redemption option, closing price to conversion price, minimum percentage						130.00%
Minimum number of trading days in 30 consecutive trading days period prior to redemption notice date where closing price exceeds conversion price by a minimum percentage						20
Number of consecutive trading day period prior to redemption notice date where closing price exceeds conversion price by a minimum percentage						30 days
Shares of common stock reserved for future issuance						9,197,944
Effective interest rate for fair value of debt compnent of notes						7.00%
Fair value of debt component of notes						170,400,000
Carrying amount of equity component of convertible notes						$ 43,100,000		$ 43,131,000
Minimum percentage of aggregate principal amount required to be held by trustee or holders to declare notes immediately payable						25.00%