Condensed Consolidating Financial Statements - Additional Information (Detail)	9 Months Ended
	Aug. 31, 2011
Condensed Financial Statements, Captions [Line Items]
No restrictions on ability to obtain funds from subsidiaries by dividend or loan	In the absence of both default and notice, there are no restrictions imposed by the Company's 2010 Credit Facility, 5.4 percent Senior Notes, or guarantees on the Company's ability to obtain funds from its subsidiaries by dividend or loan.
5.4 percent Senior Notes
Condensed Financial Statements, Captions [Line Items]
Reason for disclosure of condensed consolidating financial information for subsidiary guarantors	Certain of the Company's wholly-owned domestic subsidiaries have, jointly and severally, fully and unconditionally guaranteed, to each holder of 5.4 percent Senior Notes and the trustee under the Indenture for the 5.4 percent Senior Notes, the full and prompt performance of the Company's obligations under the indenture and the 5.4 percent Senior Notes, including the payment of principal (or premium, if any) and interest on the 5.4 percent Senior Notes, on an equal and ratable basis.