Long-Term Debt (Parenthetical) (Detail)	Aug. 31, 2013	Nov. 30, 2012
4.63 percent Senior Notes
Debt Instrument [Line Items]
Debt, interest rate	4.63%	4.63%
3.95 percent Senior Notes
Debt Instrument [Line Items]
Debt, interest rate	3.95%	3.95%
4.82 percent Revenue Bonds
Debt Instrument [Line Items]
Debt, interest rate	4.82%	4.82%
6.25 percent Term Loan
Debt Instrument [Line Items]
Debt, interest rate	6.25%	6.25%

Interest rate stated in the contractual debt agreement.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: 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))

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

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