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GOODWILL, INTANGIBLE ASSETS, NET, AND DIGITAL ASSETS HELD - Goodwill by segment (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Goodwill |  |  |  |
Balance at beginning of the period |  | $ 3,025.4 |  |
Adjustment |  | 3.4 |  |
Additions |  | 592.5 |  |
Impairment | $ (460.1) | (460.1) |  |
Changes in foreign currency exchange rates |  | (29.2) |  |
Balance at end of the period | 3,132.0 | 3,132.0 |  |
Deferred tax benefit |  | 142.3 | $ (5.9) |
Carrying value | 243.5 | 243.5 |  | $ 245.8
Options |  |  |  |
Goodwill |  |  |  |
Balance at beginning of the period |  | 305.8 |  |
Balance at end of the period | 305.8 | 305.8 |  |
North American Equities |  |  |  |
Goodwill |  |  |  |
Balance at beginning of the period |  | 1,876.9 |  |
Additions |  | 132.4 |  |
Changes in foreign currency exchange rates |  | (0.5) |  |
Balance at end of the period | 2,008.8 | 2,008.8 |  |
Europe and Asia Pacific |  |  |  |
Goodwill |  |  |  |
Balance at beginning of the period |  | 575.5 |  |
Adjustment |  | 3.4 |  |
Changes in foreign currency exchange rates |  | (28.7) |  |
Balance at end of the period | 550.2 | 550.2 |  |
Global FX |  |  |  |
Goodwill |  |  |  |
Balance at beginning of the period |  | 267.2 |  |
Balance at end of the period | 267.2 | 267.2 |  |
Digital |  |  |  |
Goodwill |  |  |  |
Additions |  | 460.1 |  |
Impairment | 460.1 | (460.1) |  |
Deferred tax benefit | 116.2 |  |  |
Decrease in carrying value | 343.9 | 343.9 |  |
Carrying value | 220.0 | 220.0 |  |
Intangible asset impairment |  | 0.0 |  |
Futures |  |  |  |
Goodwill |  |  |  |
Balance at end of the period | $ 0.0 | $ 0.0 |  |

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