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ACQUISITIONS (Tables) | 12 Months Ended
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Dec. 31, 2021
ACQUISITIONS |
Schedule of finite-lived and indefinite-lived intangible assets acquired | The following table presents the details of intangible assets at the dates of acquisition (in millions, except as stated). All acquired intangible assets with finite lives are amortized using the straight-line method.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Hanweck |  | Useful Life (Years) |  | FT Options |  | Useful Life (Years) |  | Trade Alert |  | Useful Life (Years) |  | EuroCCP |  | Useful Life (Years) |  | MATCHNow |  | Useful Life (Years) |  | BIDS |  | Useful Life (Years) |  | Chi-X Asia Pacific |  | Useful Life (Years)
Trading registrations and licenses | ​ | $ | — | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | $ | 28.1 | ​ | Indefinite | ​ | $ | 18.4 | ​ | Indefinite | ​ | $ | — | ​ | ​ | ​ | $ | 6.2 | ​ | Indefinite
Customer relationships | ​ | ​ | 4.9 | ​ | 13 | ​ | ​ | 2.2 | ​ | 13 | ​ | ​ | 0.7 | ​ | 13 | ​ | ​ | — | ​ | ​ | ​ | ​ | 17.4 | ​ | 15 | ​ | ​ | 137.0 | ​ | 17 | ​ | ​ | 60.1 | ​ | 30
Technology | ​ | ​ | 2.1 | ​ | 4 | ​ | ​ | 0.9 | ​ | 4 | ​ | ​ | 0.3 | ​ | 4 | ​ | ​ | 3.6 | ​ | 6 | ​ | ​ | 0.7 | ​ | 7 | ​ | ​ | 17.8 | ​ | 11 | ​ | ​ | 7.5 | ​ | 2
Trademarks and tradenames | ​ | ​ | 7.0 | ​ | 10 | ​ | ​ | 3.2 | ​ | 10 | ​ | ​ | 1.0 | ​ | 10 | ​ | ​ | 0.6 | ​ | 10 | ​ | ​ | 0.2 | ​ | 2 | ​ | ​ | 1.6 | ​ | 10 | ​ | ​ | — | ​ | ​
Total identifiable intangible assets | ​ | $ | 14.0 | ​ | ​ | ​ | $ | 6.3 | ​ | ​ | ​ | $ | 2.0 | ​ | ​ | ​ | $ | 32.3 | ​ | ​ | ​ | $ | 36.7 | ​ | ​ | ​ | $ | 156.4 | ​ | ​ | ​ | $ | 73.8 | ​ | ​

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- Definition Tabular disclosure of finite-lived and indefinite-lived intangible assets acquired as part of a business combination. + References No definition available. + Details
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