Acquisition - Schedule of Expenses in Connection with Acquisition (Details) (Rocketdyne Business [Member], USD $) In Millions, unless otherwise specified	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Business Acquisition [Line Items]
Expenses incurred in acquisition	$ 31.6	$ 20.0	$ 11.6
Legal Expenses [Member]
Business Acquisition [Line Items]
Expenses incurred in acquisition	16.4
Professional Fees And Consulting [Member]
Business Acquisition [Line Items]
Expenses incurred in acquisition	8.9
Internal Labor [Member]
Business Acquisition [Line Items]
Expenses incurred in acquisition	3.4
Other Expenses [Member]
Business Acquisition [Line Items]
Expenses incurred in acquisition	1.2
Liquid Divert And Attitude Control Systems [Member]
Business Acquisition [Line Items]
Expenses incurred in acquisition	1.7
Liquid Divert And Attitude Control Systems [Member] | Internal Labor [Member]
Business Acquisition [Line Items]
Expenses incurred in acquisition	$ 0.3