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Subsequent Events (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Oct. 03, 2011	Sep. 30, 2011
Subsequent Events [Abstract]
Total purchase consideration	$ 66.0	$ 102.5
Percent of outstanding membership units acquired	100.00%

X

- Definition

Percent of outstanding membership units acquired.

+ Details

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Namespace Prefix:	caci
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Balance Type:	na
Period Type:	instant

X

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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