Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended						0 Months Ended	12 Months Ended				12 Months Ended			12 Months Ended	0 Months Ended				12 Months Ended
	Aug. 31, 2010	Nov. 30, 2013 Y LegalMatter	Nov. 30, 2012	Nov. 30, 2011 LegalMatter Plaintiff	Nov. 30, 2013 7.125% Second-Priority Senior Secured Notes [Member]	Jun. 28, 2013 7.125% Second-Priority Senior Secured Notes [Member]	Jan. 28, 2013 7.125% Second-Priority Senior Secured Notes [Member]	Jun. 14, 2013 Rocketdyne Business [Member]	Nov. 30, 2013 Rocketdyne Business [Member]	Nov. 30, 2013 Minimum [Member]	Nov. 30, 2013 Maximum [Member]	Nov. 30, 2013 Contracting business [Member]	Nov. 30, 2013 Aerojet - Sacramento [Member]	Nov. 30, 2013 Aerojet - Sacramento [Member] Minimum [Member]	Nov. 30, 2013 Aerojet - Sacramento [Member] Maximum [Member]	Nov. 30, 2013 Environmental Protection Agency [Member] acre	Mar. 14, 2008 Rio Del Oro Property [Member] acre	Nov. 30, 2013 Aerojet - BPOU [Member]	Nov. 30, 2013 Aerojet - BPOU [Member] Minimum [Member]	Nov. 30, 2013 Aerojet - BPOU [Member] Maximum [Member]	Nov. 30, 2013 Toledo [Member] Payments	Nov. 30, 2013 Toledo [Member] Minimum [Member]	Nov. 30, 2013 Toledo [Member] Maximum [Member]	Nov. 30, 2013 Northrop Agreement [Member]
Commitment And Contingencies [Line Items]
Lease renewal options range										1 year	10 years
Rent expense		$ 20.1	$ 11.8	$ 12.9
Lease income		5.7	5.0	6.7
Environmental remediation costs, recognition period		0.2
Unresolved asbestos cases pending		129		16
Accrued estimated liability		0
Number of plaintiffs				271
Reimbursement of legal fees and expenses				1.7
Number of environmental remediation matters		40
Environmental remediation term		15 years
Future estimated environmental costs total										171.3	289.8			128.0	199.5				26.9	57.3		0.2	0.5
Environmental costs above the cumulative limitation		171.3											128.0					26.9						22.8
Environmental obligation funding percent												95.00%
Guarantee obligations													75					25
Additional guarantee obligations													20
Non-contaminated land																2,600	400
Project Agreement term		15
Total project cost to complete the project																						47	49
Net project costs																						23.5	24.5
Environmental costs, increase in Company's share																					0.1
Payments for environmental issues																					4.3
Number of payments for environmental settlement in 2013																					2
Reserve for settlement and PCB related environmental issues																					2.7
Recoverable expenditures																					0
Environmental remediation costs, recognition period		15 years
Pre-Close Environmental Costs		20.0
Current annual billing limitation																								6.0
Percentage of environmental costs	12.00%
Increasing percentage of environmental costs	37.00%
Total reimbursable costs under the Northrop Agreement																								189.7
Outstanding commercial letters of credit		58.1
Outstanding surety bonds		43.7
Guarantee obligations		120.0
Amount of million pending future acquisition of UTC's ownership								$ 55.0	$ 55.0
Expected future acquisition of ownership interest percentage								50.00%	50.00%
Senior subordinated notes, bearing interest					7.125%	7.125%	7.125%