Commitments and Contingencies - Narrative - Environmental Reserves and Estimated Recoveries (Detail) (USD $)	9 Months Ended
	Aug. 31, 2014	Oct. 01, 2010	May 31, 2010
Site Contingency [Line Items]
Environmental remediation costs, recognition period	15 years
Pre-Close Environmental Costs	$ 20,000,000
Percentage of environmental costs			12.00%
Non-reimbursable percentage of environmental costs		37.00%
Northrop [Member]
Site Contingency [Line Items]
Current annual billing limitation	6,000,000.0
Total reimbursable costs under the Northrop Agreement	189,700,000
Environmental costs above the cumulative limitation	28,600,000
Northrop [Member] | Maximum [Member]
Site Contingency [Line Items]
Total reimbursable costs under the Northrop Agreement	$ 189,700,000