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ACQUISITIONS (Details) $ in Millions, € in Billions |  |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) | Aug. 04, 2020 USD ($) | Jul. 01, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jul. 01, 2020 EUR (€)
Acquisitions |  |  |  |  |  |  |  |
Contingent consideration liabilities | $ 32.7 |  |  | $ 26.6 |  | $ 26.6 |  |
Compensation and benefits |  |  |  | 67.7 | $ 54.9 | 140.0 | $ 108.2 |
Acquisition-related costs |  |  |  | 1.8 | 9.4 | 5.2 | 10.2 |
Professional fees |  |  |  | 22.4 | 12.3 | 38.0 | 27.2 |
Credit Facility |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Debt instrument face amount | € |  |  |  |  |  |  |  | € 1.5
Acquisitions |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Acquisition-related costs |  |  |  | 1.8 | 9.4 | 5.2 | 10.2 |
Professional fees |  |  |  | $ 1.8 | 1.3 | 4.6 | 2.1 |
Impairment of investment |  |  |  |  | $ 8.1 | $ 0.6 | $ 8.1 |
EuroCCP |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Intangibles |  |  | $ 32.3 |  |  |  |  |
Working capital |  |  | $ 56.0 |  |  |  |  |
Ownership interest acquired (as a percent) |  |  | 80.00% |  |  |  |  | 80.00%
Bargain purchase gain |  |  | $ 32.6 |  |  |  |  |
EuroCCP | Credit Facility |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Debt instrument face amount | € |  |  |  |  |  |  |  | € 1.5
Hanweck, FT Options, Trade Alert, and MATCHNow |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Goodwill |  | $ 100.7 |  |  |  |  |  |
Intangibles |  | 59.0 |  |  |  |  |  |
Working capital |  | 2.2 |  |  |  |  |  |
Contingent consideration liabilities |  | $ 32.7 |  |  |  |  |  |
BIDS Holdings |  |  |  |  |  |  |  |
Acquisitions |  |  |  |  |  |  |  |
Goodwill | 100.0 |  |  |  |  |  |  |
Intangibles | 156.4 |  |  |  |  |  |  |
Working capital | $ 23.3 |  |  |  |  |  |  |

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