Significant Customers	6 Months Ended
Jun. 30, 2013
Segment Reporting [Abstract]
Significant Customers	Significant Customers Revenue from the U.S. Government, which includes foreign military sales, includes revenue from contracts for which the Company is the prime contractor as well as those for which the Company is a subcontractor and the ultimate customer is the U.S. Government. The KGS segment has substantial revenue from the U.S. Government. Sales to the U.S. Government amounted to approximately $140.0 million and $152.2 million or 64% and 65% of total Kratos revenue for the three months ended June 24, 2012 and June 30, 2013, respectively, and approximately $280.9 million and $317.6 million, or 65% and 65%, of total revenue for the six months ended June 24, 2012 and June 30, 2013, respectively. The U.S. Government continues to focus on developing and implementing spending, tax, and other initiatives to reduce the deficit, create jobs, and stimulate the economy. Although defense spending is expected to remain a national priority within future federal budgets, the Budget Control Act of 2011 (“Budget Control Act”) committed the U.S. Government to reduce the federal deficit over the following ten years. Under the Budget Control Act, the Bi-Partisan Congressional Joint Select Committee on Deficit Reduction (“the Joint Committee”) was responsible for identifying $1.2 to $1.5 trillion in deficit reductions by November 30, 2011. The Joint Committee was unable to identify the reductions by this deadline and thereby triggered a provision of the Budget Control Act called “sequestration,” which requires very substantial automatic spending cuts that have started in 2013, are split between defense and non-defense programs, and continue over a nine-year period. On March 26, 2013, the President signed into law the Consolidated and Further Continuing Appropriations Act, 2013, which includes specific appropriations for the Company's major federal customers, including the DoD. On April 10, 2013, the President delivered his proposed FY 2014 budget to Congress. The President's $527 billion FY 2014 defense budget is slightly lower than final defense appropriations for FY 2013. While it largely reflects defense spending plans in the FY 2013 budget, it does not reflect the reductions mandated by Part II of the Budget Control Act. The Congressional appropriation and authorization of FY 2014 defense spending is likely to be marked by significant debate and an uncertain schedule. There continues to be uncertainty in how sequestration will ultimately be implemented, and there are many variables in how the law could be applied that make it difficult to determine the specific impacts. Any automatic reductions in national defense programs could impact the Company's significant customers, which in turn could impact the Company's business and financial results.

Significant Customers

Revenue from the U.S. Government, which includes foreign military sales, includes revenue from contracts for which the Company is the prime contractor as well as those for which the Company is a subcontractor and the ultimate customer is the U.S. Government. The KGS segment has substantial revenue from the U.S. Government. Sales to the U.S. Government amounted to approximately $140.0 million and $152.2 million or 64% and 65% of total Kratos revenue for the three months ended June 24, 2012 and June 30, 2013, respectively, and approximately $280.9 million and $317.6 million, or 65% and 65%, of total revenue for the six months ended June 24, 2012 and June 30, 2013, respectively.

The U.S. Government continues to focus on developing and implementing spending, tax, and other initiatives to reduce the deficit, create jobs, and stimulate the economy. Although defense spending is expected to remain a national priority within future federal budgets, the Budget Control Act of 2011 (“Budget Control Act”) committed the U.S. Government to reduce the federal deficit over the following ten years. Under the Budget Control Act, the Bi-Partisan Congressional Joint Select Committee on Deficit Reduction (“the Joint Committee”) was responsible for identifying $1.2 to $1.5 trillion in deficit reductions by November 30, 2011. The Joint Committee was unable to identify the reductions by this deadline and thereby triggered a provision of the Budget Control Act called “sequestration,” which requires very substantial automatic spending cuts that have started in 2013, are split between defense and non-defense programs, and continue over a nine-year period.

On March 26, 2013, the President signed into law the Consolidated and Further Continuing Appropriations Act, 2013, which includes specific appropriations for the Company's major federal customers, including the DoD. On April 10, 2013, the President delivered his proposed FY 2014 budget to Congress. The President's $527 billion FY 2014 defense budget is slightly lower than final defense appropriations for FY 2013. While it largely reflects defense spending plans in the FY 2013 budget, it does not reflect the reductions mandated by Part II of the Budget Control Act. The Congressional appropriation and authorization of FY 2014 defense spending is likely to be marked by significant debate and an uncertain schedule. There continues to be uncertainty in how sequestration will ultimately be implemented, and there are many variables in how the law could be applied that make it difficult to determine the specific impacts. Any automatic reductions in national defense programs could impact the Company's significant customers, which in turn could impact the Company's business and financial results.