Fixed Assets, Net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment
Depreciation expense	$ 10.2	$ 12.2	$ 28.9	$ 27.3
Impairment charges	1.0	2.7	$ 2.4	$ 3.5
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration]			Depreciation and amortization	Depreciation and amortization
Software, including software development costs
Property, Plant and Equipment
Software development costs capitalized	3.4	7.1	$ 9.7	$ 9.1
Amortization of software development costs	$ 0.7	$ 0.8	$ 2.0	$ 1.5

Additions made to capitalized computer software costs during the period.

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Amount of expense for amortization of capitalized computer software costs.

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Indicates line item in statement of income or comprehensive income that includes impairment of long-lived asset held for use.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
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-Publisher FASB
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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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