Debt (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
Jul. 31, 2013
Debt Disclosure Details [Line Items]
2017 senior notes principal value repurchased	$ 250.0
Senior Notes 2023 [Member]
Debt Disclosure Details [Line Items]
Prinicipal amount of debt issued	325.0
Net proceeds from issuance of long-term debt	321.3
Interest rate on unsecured senior note debt	3.625%
Unsecured senior note debt maturity date	Jun. 15, 2023
Tendered Notes [Member]
Debt Disclosure Details [Line Items]
2017 senior notes principal value repurchased	250.0
Consideration paid to the holders of the tendered notes	301.5
Reference interest rate	0.625 percent U.S. Treasury Notes due September 30, 2017
Treasury spread	0.30%
Closing date tender offer	Jun. 28, 2013
Date of last interest payment	Apr. 02, 2013
Call premium on debt extinguishment	51.5
Accrued interest portion of payment made to noteholders upon repayment of long-term debt	$ 3.9

Tender premium paid to note holders in excess of the face amount.

No definition available.

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- Definition

Date when the tender offer closed, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Definition

Date of the last interest payment date, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Definition

Accrued interest portion of payment made to noteholders upon repayment of long-term debt

+ References

No definition available.

+ Details

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- Definition

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ 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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Article 5

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- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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