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GOODWILL, INTANGIBLE ASSETS, NET, AND DIGITAL ASSETS HELD - Intangible assets by segment (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Intangible Assets |  |
Balance at beginning of the period | $ 1,662.8 |
Dispositions | (0.8) |
Amortization | (30.9) | $ (30.6)
Changes in foreign currency exchange rates | 5.4 |
Balance at end of the period | 1,636.5 |
Options |  |
Intangible Assets |  |
Balance at beginning of the period | 146.1 |
Amortization | (3.1) |
Balance at end of the period | 143.0 |
North American Equities |  |
Intangible Assets |  |
Balance at beginning of the period | 992.8 |
Amortization | (15.5) |
Changes in foreign currency exchange rates | 0.1 |
Balance at end of the period | 977.4 |
Europe and Asia Pacific |  |
Intangible Assets |  |
Balance at beginning of the period | 359.9 |
Amortization | (6.1) |
Changes in foreign currency exchange rates | 5.3 |
Balance at end of the period | 359.1 |
Global FX |  |
Intangible Assets |  |
Balance at beginning of the period | 72.8 |
Amortization | (4.5) |
Balance at end of the period | 68.3 |
Digital |  |
Intangible Assets |  |
Balance at beginning of the period | 91.2 |
Dispositions | (0.8) |
Amortization | (1.7) |
Balance at end of the period | $ 88.7 |

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- Definition Finite-lived and Indefinite-lived Intangible Assets [Roll Forward] + References No definition available. + Details
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- Definition Intangible Assets Disposed + References No definition available. + Details
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- Definition Intangible Assets, Foreign Currency Translation Gain (Loss) + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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