Cost Reduction Plan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended	6 Months Ended
	Jan. 30, 2014 Employees	May 31, 2014	May 31, 2014	Feb. 28, 2014
Restructuring Cost and Reserve [Line Items]
Reduction in headcount of employees	260
Restructuring Plan, liability		$ 2.7	$ 2.7	$ 10.0
Restructuring Plan, payments liability		2.2	2.2
Restructuring Plan cost		4.8
Restructuring costs description			The Company believes that the anticipated restructuring savings will exceed restructuring costs by a factor of at least two to one; therefore, the costs were deferred as the Company believes that subsequent recovery of said costs through the pricing of the Company's products and services to the U.S. government is probable.
Rocketdyne Business [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Plan, payments liability		0.5	0.5
Restructuring Plan cost			$ 3.0