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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Schedule of Equity Method Investments [Line Items] |  |  |  |
Total revenues |  | $ 2,026.0 | $ 1,636.9 | $ 930.7
Foreign currency transaction losses |  | 4.8 | (7.5) | (3.5)
Restricted cash | $ 0.6 | 0.6 | 0.6 |
Acquisition costs |  |  | 45.5 | 8.7
Goodwill impairment expense |  | $ 401.0 | 0.0 | 0.0
Software useful life |  | 7 years |  |
Amortization of capitalized software |  | $ 5.0 | 4.4 | 2.8
Accumulated amortization of capitalized software costs | 30.9 | 30.9 | 36.5 |
Foreign currency translation adjustments (losses) |  | 133.8 |  |
Deferred gain released from AOCL |  | 8.9 |  |
ATM |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Total revenues |  | 1,610.0 | 1,396.2 | 930.7
Goodwill impairment expense | $ 401.0 | 401.0 | 0.0 |
Other Operating Income (Expense) |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Foreign currency transaction losses |  | $ 1.7 | 1.8 | 6.9
Restricted Stock Plan |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Plan performance period (years) |  | 3 years |  |
Minimum | Restricted Stock |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Share based compensation vesting period (years) |  | 1 year |  |
Minimum | Customer relationships |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Estimated useful life | 12 years | 12 years |  |
Minimum | Developed technology |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Estimated useful life | 4 years | 4 years |  |
Maximum | Restricted Stock |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Share based compensation vesting period (years) |  | 3 years |  |
Maximum | Customer relationships |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Estimated useful life | 23 years | 23 years |  |
Maximum | Developed technology |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Estimated useful life | 20 years | 20 years |  |
Royalty |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Total revenues |  | $ 4.4 | $ 6.9 | $ 6.1

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