Commitments and Contingencies - Summary of Pre-Close Environmental Costs (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	May 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Pre-Close Environmental Costs	$ 20.0
Amount spent through May 31, 2014	(16.5)
Amount included as a component of reserves for environmental remediation costs in the unaudited condensed consolidated balance sheet as of May 31, 2014	(3.5)
Remaining Pre-Close Environmental Costs	$ 0