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Percent added to Eurodollar rate to arrive at interest rate of base rate loans.

+ References

No definition available.

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- Definition

Percent added to Eurodollar rate to arrive at interest rate of Eurodollar rate loans.

+ References

No definition available.

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- Definition

Percent added to Federal Funds rate to arrive at interest rate of base rate loans.

+ References

No definition available.

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- Definition

Line of Credit Additional Borrowing Capacity

+ References

No definition available.

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- Definition

Percentage of the principal amount of debt instruments used when calculating a redemption price for previously issued debt instruments.

+ References

No definition available.

+ Details

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- Definition

Interest rate of a comparable treasury issue plus this percentage used when calculating a redemption price for previously issued debt instruments.

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No definition available.

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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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- Definition

Interest rate stated in the contractual debt agreement.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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

-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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-Publisher FASB

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.19(b),22(b))

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-Name Regulation S-X (SX)

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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No definition available.

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Borrowings and Credit Facilities (Details Textual) (USD $) In Millions, unless otherwise specified				0 Months Ended			0 Months Ended			0 Months Ended			0 Months Ended		0 Months Ended
	Apr. 26, 2013	Oct. 31, 2011	Jun. 16, 2011 Term Loan due 2016	Nov. 01, 2006 6.0% Senior Notes due 2016	Apr. 26, 2013 6.0% Senior Notes due 2016	Oct. 26, 2012 6.0% Senior Notes due 2016	Nov. 01, 2006 6.625% Senior Notes due 2036	Apr. 26, 2013 6.625% Senior Notes due 2036	Oct. 26, 2012 6.625% Senior Notes due 2036	Oct. 12, 2011 5.125% Senior Notes due 2021	Apr. 26, 2013 5.125% Senior Notes due 2021	Oct. 26, 2012 5.125% Senior Notes due 2021	Oct. 12, 2012 Revolving Credit Facility	Oct. 27, 2010 Revolving Credit Facility	Oct. 12, 2012 Revolving Credit Facility Minimum	Oct. 12, 2012 Revolving Credit Facility Maximum
Borrowings and Credit Facilities (Textual) [Abstract]
Unsecured revolving credit facility (Credit Agreement), maximum borrowing capacity													$ 1,000.0	$ 700.0
Line of credit additional borrowing capacity													250.0
Line of credit facility, unused capacity, commitment fee percentage															0.10%	0.325%
Eurodollar plus percentage for Eurodollar loans															1.00%	2.00%
Fed funds rate plus percentage													0.50%
Eurodollar plus percentage for base rate loans													1.00%
Principal amount		250.0	500.0	250.0			150.0			500.0
Long-term Line of Credit	28.0
Letters of credit outstanding, amount	322.5
Available borrowing capacity	649.5
Interest rate				6.00%	6.00%	6.00%	6.625%	6.625%	6.625%	5.125%	5.125%	5.125%
Discount on note payable										$ 4.2
Percentage of principal amount of notes to be redeemed at company's option (in hundredths)				100.00%						100.00%
Treasury rate of a comparable issue plus percentage				0.30%			0.375%			0.50%