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GOODWILL, INTANGIBLE ASSETS, NET, AND DIGITAL ASSETS HELD - Intangible assets by segment (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2025 | Jun. 30, 2024 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Intangible Assets |  |  |  |  |
Balance at beginning of the period |  |  | $ 1,376.9 | $ 1,561.5 |
Additions |  |  |  | 1.2 |
Sales |  |  | (0.7) | (0.1) |
Amortization |  |  | (70.2) | (88.7) | $ (116.6)
Changes in foreign currency exchange rates |  |  | 27.8 | (16.0) |
Impairment |  |  | (36.6) | (81.0) |
Balance at end of the period | $ 1,297.2 |  | 1,297.2 | 1,376.9 | 1,561.5
Options |  |  |  |  |
Intangible Assets |  |  |  |  |
Balance at beginning of the period |  |  | 126.4 | 134.1 |
Additions |  |  |  | 0.0 |
Sales |  |  | 0.0 | 0.0 |
Amortization |  |  | (6.5) | (7.7) |
Changes in foreign currency exchange rates |  |  | 0.0 | 0.0 |
Impairment |  |  | 0.0 | 0.0 |
Balance at end of the period | 119.9 |  | 119.9 | 126.4 | 134.1
North American Equities |  |  |  |  |
Intangible Assets |  |  |  |  |
Balance at beginning of the period |  |  | 879.6 | 935.3 |
Additions |  |  |  | 1.2 |
Sales |  |  | (0.7) | 0.0 |
Amortization |  |  | (39.9) | (50.6) |
Changes in foreign currency exchange rates |  |  | 3.3 | (6.3) |
Impairment | (17.7) |  | (17.7) | 0.0 |
Balance at end of the period | 824.6 |  | 824.6 | 879.6 | 935.3
Europe and Asia Pacific |  |  |  |  |
Intangible Assets |  |  |  |  |
Balance at beginning of the period |  |  | 326.7 | 352.5 |
Additions |  |  |  | 0.0 |
Sales |  |  | 0.0 | 0.0 |
Amortization |  |  | (14.2) | (16.1) |
Changes in foreign currency exchange rates |  |  | 24.5 | (9.7) |
Impairment |  |  | (18.9) | 0.0 |
Balance at end of the period | 318.1 |  | 318.1 | 326.7 | 352.5
Global FX |  |  |  |  |
Intangible Assets |  |  |  |  |
Balance at beginning of the period |  |  | 44.2 | 56.2 |
Additions |  |  |  | 0.0 |
Sales |  |  | 0.0 | 0.0 |
Amortization |  |  | (9.6) | (12.0) |
Changes in foreign currency exchange rates |  |  | 0.0 | 0.0 |
Impairment |  |  | 0.0 | 0.0 |
Balance at end of the period | 34.6 |  | 34.6 | 44.2 | 56.2
Digital |  |  |  |  |
Intangible Assets |  |  |  |  |
Balance at beginning of the period |  |  | 0.0 | 83.4 |
Additions |  |  |  | 0.0 |
Sales |  |  | 0.0 | (0.1) |
Amortization |  |  | 0.0 | (2.3) |
Changes in foreign currency exchange rates |  |  | 0.0 | 0.0 |
Impairment |  | $ (81.0) | 0.0 | (81.0) |
Balance at end of the period | $ 0.0 |  | $ 0.0 | $ 0.0 | $ 83.4

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