Balance Sheet Accounts and Supplemental Disclosures - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Statement Of Financial Position [Abstract]
Unbilled receivable expected to be collected after one year	$ 51.0
Deferred qualification costs	5.2	6.4
General and administrative costs incurred	222.8	151.1
Cumulative amount of general and administrative costs in long-term contract inventories estimated	15.4	4.4
Depreciation expense	35.8	19.3	21.8
Amortization expense	6.5	1.5	1.5
Amortization of deferred financing costs	$ 4.5	$ 2.9	$ 3.2