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Intangible Assets Changes in Carrying Value of Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Carrying Value of Goodwill | The changes in the carrying value of goodwill for our segments, IAN and CMG, for the years ended December 31, 2015 and 2014 are listed below.
|  | IAN |  | CMG |  | Total 1
Balance as of December 31, 2013 |  | $ | 3,097.0 |  |  | $ | 532.0 |  |  | $ | 3,629.0 |
Current-year acquisitions |  | 95.2 |  |  | 40.9 |  |  | 136.1 |
Foreign currency and other |  | (83.7 | ) |  | (12.2 | ) |  | (95.9 | )
Balance as of December 31, 2014 |  | $ | 3,108.5 |  |  | $ | 560.7 |  |  | $ | 3,669.2 |
Current-year acquisitions |  | 37.8 |  |  | 13.2 |  |  | 51.0 |
Foreign currency and other |  | (94.9 | ) |  | (16.8 | ) |  | (111.7 | )
Balance as of December 31, 2015 |  | $ | 3,051.4 |  |  | $ | 557.1 |  |  | $ | 3,608.5 |
1 | For all periods presented, we have not recorded a goodwill impairment charge.

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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