Acquisition - Summary of Intangible Assets Acquired (Detail) (Rocketdyne Business [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 128.3
Customer Related [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	73.1
Weighted Average Amortization Period (years)	8 years 8 months 12 days
Intellectual Property/Trade Secrets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	34.2
Weighted Average Amortization Period (years)	13 years
Non-Compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	0.5
Weighted Average Amortization Period (years)	3 years
Trade Name [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 20.5
Weighted Average Amortization Period (years)	30 years