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Basis of Presentation and Nature of Operations (Tables)
 6 Months Ended
May. 31, 2015
Contracts Accounted for under Percentage-of-Completion [Member]  
Summary of Impact from Changes in Estimates and Assumptions on Statements of Operations on Contracts
The following table summarizes the impact from changes in estimates and assumptions on the statements of operations on contracts, representing 92% of the Company’s aerospace and defense segment net sales over the first half of fiscal 2015 and 2014, accounted for under the percentage-of-completion method of accounting:
 
Three months ended May 31,
 
Six months ended May 31,
 
2015
 
2014
 
2015
 
2014
 
(In millions, except per share amounts)
Favorable (unfavorable) effect of the changes in contract estimates on income (loss) from continuing operations before income taxes
$
7.0

 
$
(5.2
)
 
$
7.2

 
$
(2.9
)
Favorable (unfavorable) effect of the changes in contract estimates on net income (loss)
4.2

 
(3.1
)
 
4.3

 
(1.6
)
Favorable (unfavorable) effect of the changes in contract estimates on basic net income (loss) per share
0.07

 
(0.05
)
 
0.07

 
(0.03
)
Favorable (unfavorable) effect of the changes in contract estimates on diluted net income (loss) per share
0.06

 
(0.05
)
 
0.06

 
(0.03
)