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Temporary Equity - Redeemable Noncontrolling Interests | 12 Months Ended
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Dec. 31, 2011
Temporary Equity - Redeemable Noncontrolling Interests [Abstract] |
Temporary Equity - Redeemable Noncontrolling Interests [Text Block] | Temporary Equity - Redeemable Noncontrolling Interests Owners of noncontrolling interests in certain of our subsidiaries have the right in certain circumstances to require us to purchase additional ownership interests at fair value as defined in the applicable agreements. Assuming that the subsidiaries perform over the relevant periods at their current profit levels, at December 31, 2011, the aggregate estimated maximum amount we could be required to pay in future periods is $202.1 million, of which $137.7 million is currently exercisable by the holders. If these rights are exercised, there would be an increase in the net income attributable to Omnicom Group Inc. as a result of our increased ownership and the reduction of net income attributable to noncontrolling interests. The ultimate amount paid could be significantly different because the redemption amount is primarily dependent on the future results of operations of the subject businesses, the timing of the exercise of these rights and changes in foreign currency exchange rates.

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- Definition Temporary Equity - Redeemable Noncontrolling Interests [Text Block] + References No definition available. + Details
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