Commitments and Contingencies - Additional Information - Legal Matters (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended	6 Months Ended
	Nov. 30, 2011 Plaintiff LegalMatter	May 31, 2014 Asbestos Litigation [Member] LegalMatter
Loss Contingencies [Line Items]
Unresolved asbestos cases pending	16	128
Accrued estimated liability		$ 0
Number of plaintiffs	271
Reimbursement of legal fees and expenses	1.7
Scheduled trial date		May 18, 2015
Estimate of liability accrued		$ 0