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Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2019
Intangible Assets |
Summary of the changes in the carrying amount of goodwill and other indefinite-lived intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Other Indefinite- |
​ | ​ | ​ | ​ | ​ | Lived Intangible | ​
​ | ​ | Goodwill | ​ | Assets | ​
Balance, January 1, 2019 | ​ | $ | 1,752.0 | ​ | $ | 486.2 | ​
Additions | ​ |  | 146.6 | ​ |  | 67.4 | ​
Disposals | ​ | ​ | (0.7) | ​ |  | — | ​
Foreign currency translation | ​ |  | (21.4) | ​ |  | (6.2) | ​
Balance, September 30, 2019 | ​ | $ | 1,876.5 | ​ | $ | 547.4 | ​

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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