GENERAL (Details) (USD $) In Millions	Jul. 26, 2011 MediaMind Technologies, Inc. ("MediaMind")	Sep. 01, 2011 EyeWonder LLC and Chors GmbH ("EyeWonder")
Business acquisition
Purchase consideration paid in cash	$ 499.3	$ 61.0
Cash paid to holders of in-the-money vested stock options	71.4
Purchase consideration paid in cash, net of estimated refunds		56.2
Estimated contingent return of the purchase price		$ 4.8

Amount of cash paid to acquire the entity.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph f(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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