Retirement Savings Plans	12 Months Ended
Jun. 30, 2012
Retirement Savings Plans [Abstract]
Retirement Savings Plans	NOTE 20. RETIREMENT SAVINGS PLANS *401(k) Plan* The Company maintains a defined contribution plan under Section 401(k) of the Internal Revenue Code, the CACI $MART Plan (the 401(k) Plan). Employees can contribute up to 75 percent (subject to certain statutory limitations) of their total cash compensation. The Company provides matching contributions equal to 50 percent of the amount of salary deferral employees elect, up to 6 percent of each employee's total calendar year cash compensation, as defined. The Company may also make discretionary profit sharing contributions to the 401(k) Plan. Employee contributions vest immediately. Employer contributions vest in full after three years of employment. Total Company contributions to the 401(k) Plan for the years ended June 30, 2012, 2011, and 2010 were $26.1 million, $21.6 million, and $17.4 million, respectively. During the year ended June 30, 2010, the Company amended the 401(k) Plan to provide that non-vested balances are forfeited upon the earlier of a distribution being taken or on December 31 of the year the participant terminated employment at the Company. Previously, non-vested balances were forfeited upon the earlier of a distribution being taken or on December 31 following a five year break in service. This change increased the amount of forfeitures available to offset Company contributions during the year ended June 30, 2010. *U.K. Defined Contribution Plan* The Company maintains a defined contribution plan in the U.K. Under the plan, employees can elect the amount of pension contributions that they wish to make out of their flexible benefit entitlements subject to certain U.K. tax limits. The contributions are deemed to be company contributions and vest immediately. Employees may also elect to make personal contributions into the plan. Contributions to this plan and its predecessor plans for the years ended June 30, 2012, 2011, and 2010 were $1.8 million, $1.5 million, and $1.5 million, respectively. *Supplemental Savings Plan* The Company maintains the Supplemental Savings Plan through which, on a calendar year basis, officers at the director level and above can elect to defer for contribution to the Supplemental Savings Plan up to 50 percent of their base compensation and up to 100 percent of their bonuses and commissions. Prior to January 1, 2011, officers at the vice president level and above were eligible to participate. During the year ended June 30, 2011, the Supplemental Savings Plan was amended to allow employees at the director level to participate. The Company provides a contribution of 5 percent of compensation for each participant's compensation that exceeds the limit as set forth in IRC 401(a)(17) (currently $250,000 per year). The Company also has the option to make annual discretionary contributions. Company contributions vest over a 5-year period, and vesting is accelerated in the event of a change of control of the Company. Participant deferrals and Company contributions will be credited with the rate of return based on the investment options and asset allocations selected by the Participant. Participants may change their asset allocation as often as daily, if they so choose. A Rabbi Trust has been established to hold and provide a measure of security for the investments that finance benefit payments. Distributions from the Supplemental Savings Plan are made upon retirement, termination, death, or total disability. The Supplemental Savings Plan also allows for in-service distributions. Supplemental Savings Plan obligations due to participants totaled $76.6 million at June 30, 2012, of which $3.4 million is included in accrued compensation and benefits in the accompanying consolidated balance sheet. Supplemental Savings Plan obligations increased by $9.3 million during the year ended June 30, 2012, consisting of $1.4 million of investment gains, $12.2 million of participant compensation deferrals, and $1.4 million of Company contributions, offset by $5.7 million of distributions. The Company maintains investment assets in a Rabbi Trust to offset the obligations under the Supplemental Savings Plan. The value of the investments in the Rabbi Trust was $77.4 million at June 30, 2012. Investment gains were $1.2 million for the year ended June 30, 2012. Contribution expense for the Supplemental Savings Plan during the years ended June 30, 2012, 2011, and 2010, was $1.2 million, $1.2 million, and $0.9 million, respectively.

NOTE 20. RETIREMENT SAVINGS PLANS

401(k) Plan

The Company maintains a defined contribution plan under Section 401(k) of the Internal Revenue Code, the CACI $MART Plan (the 401(k) Plan). Employees can contribute up to 75 percent (subject to certain statutory limitations) of their total cash compensation. The Company provides matching contributions equal to 50 percent of the amount of salary deferral employees elect, up to 6 percent of each employee's total calendar year cash compensation, as defined. The Company may also make discretionary profit sharing contributions to the 401(k) Plan. Employee contributions vest immediately. Employer contributions vest in full after three years of employment. Total Company contributions to the 401(k) Plan for the years ended June 30, 2012, 2011, and 2010 were $26.1 million, $21.6 million, and $17.4 million, respectively. During the year ended June 30, 2010, the Company amended the 401(k) Plan to provide that non-vested balances are forfeited upon the earlier of a distribution being taken or on December 31 of the year the participant terminated employment at the Company. Previously, non-vested balances were forfeited upon the earlier of a distribution being taken or on December 31 following a five year break in service. This change increased the amount of forfeitures available to offset Company contributions during the year ended June 30, 2010.

U.K. Defined Contribution Plan

The Company maintains a defined contribution plan in the U.K. Under the plan, employees can elect the amount of pension contributions that they wish to make out of their flexible benefit entitlements subject to certain U.K. tax limits. The contributions are deemed to be company contributions and vest immediately. Employees may also elect to make personal contributions into the plan. Contributions to this plan and its predecessor plans for the years ended June 30, 2012, 2011, and 2010 were $1.8 million, $1.5 million, and $1.5 million, respectively.

Supplemental Savings Plan

The Company maintains the Supplemental Savings Plan through which, on a calendar year basis, officers at the director level and above can elect to defer for contribution to the Supplemental Savings Plan up to 50 percent of their base compensation and up to 100 percent of their bonuses and commissions. Prior to January 1, 2011, officers at the vice president level and above were eligible to participate. During the year ended June 30, 2011, the Supplemental Savings Plan was amended to allow employees at the director level to participate. The Company provides a contribution of 5 percent of compensation for each participant's compensation that exceeds the limit as set forth in IRC 401(a)(17) (currently $250,000 per year). The Company also has the option to make annual discretionary contributions. Company contributions vest over a 5-year period, and vesting is accelerated in the event of a change of control of the Company. Participant deferrals and Company contributions will be credited with the rate of return based on the investment options and asset allocations selected by the Participant. Participants may change their asset allocation as often as daily, if they so choose. A Rabbi Trust has been established to hold and provide a measure of security for the investments that finance benefit payments. Distributions from the Supplemental Savings Plan are made upon retirement, termination, death, or total disability. The Supplemental Savings Plan also allows for in-service distributions.

Supplemental Savings Plan obligations due to participants totaled $76.6 million at June 30, 2012, of which $3.4 million is included in accrued compensation and benefits in the accompanying consolidated balance sheet. Supplemental Savings Plan obligations increased by $9.3 million during the year ended June 30, 2012, consisting of $1.4 million of investment gains, $12.2 million of participant compensation deferrals, and $1.4 million of Company contributions, offset by $5.7 million of distributions.

The Company maintains investment assets in a Rabbi Trust to offset the obligations under the Supplemental Savings Plan. The value of the investments in the Rabbi Trust was $77.4 million at June 30, 2012. Investment gains were $1.2 million for the year ended June 30, 2012.

Contribution expense for the Supplemental Savings Plan during the years ended June 30, 2012, 2011, and 2010, was $1.2 million, $1.2 million, and $0.9 million, respectively.