Related Party Transactions and Parent Company Equity - Additional Information (Details) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended
Sep. 27, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Sep. 26, 2014
Dec. 31, 2014
Sep. 30, 2014
Related Party Transaction [Line Items]              
Number of years until Company can enter into transactions that would affect ownership   2 years          
Percentage of ownership change due to entering into new agreements resulting in a breach of agreement (more than)   35.00%          
Escalating increases in services provided, percent (up to)   10.00%          
Transition services agreement, term   1 year          
Target working capital used in indemnification agreement $ 64,400,000            
Working capital adjustment payment from Exelis   2,600,000 0 0      
Former Parent              
Related Party Transaction [Line Items]              
General corporate expenses incurred by Exelis allocated to Company     33,400,000 36,400,000     23,300,000
Working capital adjustment payment from Exelis         $ 17,000,000 $ 2,600,000  
Minimum              
Related Party Transaction [Line Items]              
Transition services agreement, term   3 months          
Maximum              
Related Party Transaction [Line Items]              
Transition services agreement, term   24 months