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Intangible Assets | 9 Months Ended
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Sep. 30, 2021
Intangible Assets |
Intangible Assets | 6. Intangible Assets ​ Following is a summary of the changes in the carrying amount of goodwill and other indefinite-lived intangible assets during the nine months ended September 30, 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Other Indefinite- |
​ | ​ | ​ | ​ | ​ | Lived Intangible | ​
​ | ​ | Goodwill | ​ | Assets | ​
Balance, January 1, 2021 | ​ | $ | 1,928.4 | ​ | $ | 563.4 | ​
Additions | ​ |  | 137.6 | ​ |  | 43.7 | ​
Disposals | ​ | ​ | (0.6) | ​ |  | — | ​
Foreign currency translation | ​ |  | (14.5) | ​ |  | (6.4) | ​
Balance, September 30, 2021 | ​ | $ | 2,050.9 | ​ | $ | 600.7 | ​
​ The additions during the nine months ended September 30, 2021, were within our Retail Automotive and Retail Truck reportable segments. The disposals during the nine months ended September 30, 2021, were within our Retail Automotive reportable segment. We disposed of one retail automotive franchise. As of September 30, 2021, the goodwill balance within our Retail Automotive, Retail Commercial Truck, and Other reportable segments was $1,602.2 million, $369.4 million, and $79.3 million, respectively. There is no goodwill recorded in our Non-Automotive Investments reportable segment.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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