Cost Reduction Plan - Narrative (Details) $ in Millions		3 Months Ended
	Jan. 30, 2014 employee	May. 31, 2015 USD ($) employee	Feb. 28, 2015 USD ($) employee	Nov. 30, 2014 USD ($) employee	Feb. 28, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Reduction in employee headcount | employee	260		60	90
Restructuring plan, payments liability					$ 10.0
Restructuring plan cost				$ 6.3
Restructuring plan, liability			$ 4.1	4.3
Reduction in restructuring plan liability		$ 5.1
CIP [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring plan, payments liability		$ 11.2	$ 0.0
Expected reduction in employee headcount | employee		500
Estimated restructuring and related costs over next four years		$ 110.0
Accelerated depreciation expense due to CIP		$ 0.1
Other Noncurrent Assets [Member] | Rocketdyne Business [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring plan cost				$ 3.0