Summary of Significant Accounting Policies, (As Restated for fiscal 2014 and 2013) - Schedule of Impact of Contracts in Progress on Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Nov. 30, 2015	Aug. 31, 2015	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May. 31, 2014	Feb. 28, 2014	May. 31, 2015	May. 31, 2014	Aug. 31, 2015	Aug. 31, 2014	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Change in Accounting Estimate [Line Items]
Favorable effect of the changes in contract estimates on loss from continuing operations before income taxes	$ 7.6	$ (38.5)	$ 17.3	$ (3.5)	$ 12.0	$ (10.7)	$ (48.4)	$ (2.2)	$ 13.8	$ (50.6)	$ (24.7)	$ (61.3)	$ (17.1)	$ (49.3)	$ 162.7
Favorable effect of the changes in contract estimates on net (loss) income	$ 7.7	$ (37.9)	$ 17.3	$ (3.3)	$ 11.9	$ (10.5)	$ (49.2)	$ (2.2)	$ 14.0	$ (51.4)	$ (23.9)	$ (61.9)	$ (16.2)	$ (50.0)	$ 162.9
Favorable effect of the changes in contract estimates on basic net (loss) income per share (in USD per share)	$ 0.12	$ (0.61)	$ 0.28	$ (0.06)	$ 0.20	$ (0.19)	$ (0.85)	$ (0.04)	$ 0.23				$ (0.27)	$ (0.86)	$ 2.68
Favorable effect of the changes in contract estimates on diluted net (loss) income per share (in USD per share)	$ 0.12	$ (0.61)	$ 0.25	$ (0.06)	$ 0.18	$ (0.19)	$ (0.85)	$ (0.04)	$ 0.22				$ (0.27)	$ (0.86)	$ 2.05
Aerospace and Defense [Member] | Contracts Accounted for under Percentage-of-Completion [Member]
Change in Accounting Estimate [Line Items]
Favorable effect of the changes in contract estimates on loss from continuing operations before income taxes													$ 41.2	$ 9.2	$ 23.2
Favorable effect of the changes in contract estimates on net (loss) income													$ 24.7	$ 5.5	$ 13.6
Favorable effect of the changes in contract estimates on basic net (loss) income per share (in USD per share)													$ 0.40	$ 0.10	$ 0.22
Favorable effect of the changes in contract estimates on diluted net (loss) income per share (in USD per share)													$ 0.40	$ 0.10	$ 0.16