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LEASES (Details) $ in Millions	1 Months Ended		12 Months Ended
	Oct. 31, 2021 USD ($) ft²	May 31, 2021 USD ($) ft²	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Leases
Options to renew			true
Minimum lease payments			$ 144.8	$ 144.6
Option to terminate period			1 year
Additional right of use assets			$ 14.1
Additional operating lease liabilities			$ 14.1
Minimum
Leases
Initial term			1 year
Renewal term			1 year
Maximum
Leases
Initial term			5 years
Renewal term			5 years
Option to terminate period			1 year
Acquisitions
Leases
Additional right of use assets			$ 0.9
Technology support services
Leases
Rent expense			$ 25.6	$ 20.2	$ 12.4
Office space In London
Leases
Minimum lease payments		$ 9.5
Area of office space leased | ft²		21,000
Initial term of lease		69 months
Renewal Term		60 months
Office space in Amsterdam
Leases
Minimum lease payments	$ 9.2
Area of office space leased | ft²	29,500
Initial term of lease	120 months
Renewal Term	60 months

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+ References

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- Definition

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+ References

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No definition available.

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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+ References

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-Publisher FASB
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-SubTopic 30
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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-Topic 842
-SubTopic 30
-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
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+ References

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