Stock-Based Compensation - Additional Information(Details) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended
Oct. 10, 2014
Dec. 31, 2014
Sep. 29, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Incremental compensation expense   $ 0.7    
Incremental compensation expense related to fully vested awards   0.3    
Stock price   $ 27.40   27.40
Fair value of each grant on grant date $ 8.24      
Number of exercisable options, out of the money   0   0
Vested or expected to vest   446,043   446,043
Vested or expected to vest, weighted average exercise price (in dollars per share)   $ 17.58   17.58
Vested or expected to vest, aggregate intrinsic value   3.6   3.6
Vested or expected to vest, weighted average remaining contractual life   8 years 8 months 13 days    
Expected life (in years) 7 years 0 months 0 days 7 years 0 months 0 days    
2014 Omnibus Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares of Company's common stock authorized for issuance (in shares)   2,625,000   2,625,000
Shares available   1,744,854   1,744,854
Equity Based Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation costs   6.6   6.6
Unrecognized compensation costs, period for recognition   1 year 10 months 20 days    
Liability Based Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation costs   $ 0.3   0.3
Unrecognized compensation costs, period for recognition   0 years 11 months 23 days    
Restricted Stock Units (RSUs) and Non-Qualified Stock Options (NQO) | 2014 Omnibus Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards converted or adjusted     514,941  
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards granted 6,727      
Options granted       202,857
Vesting period   3 years    
Vesting increments   33.33%    
Weighted average grant fair value (in dollars per share) $ 20.62      
Non-Qualified Stock Options (NQO)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted       171,298
Vesting period   3 years    
Vesting increments   33.33%    
Expiration from the date of grant   10 years    
Executives | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock price $ 20.62      
Executives | Restricted Stock Units (RSUs) | Exelis Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards granted 6,727      
Key Employees | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards granted 175,606      
Stock price $ 20.62      
Key Employees | Non-Qualified Stock Options (NQO)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted 171,298      
Fair value of each grant on grant date $ 8.24      
Nonemployee Directors | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards granted 21,024      
Stock price $ 20.62      
Number of days before annual meeting when awards vest 1 day