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Intangible Assets Table (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | $ 1,124.3 |  | $ 1,124.3 |  | $ 1,117.7
Finite-Lived Intangible Assets, Accumulated Amortization | (646.8) |  | (646.8) |  | (584.9)
Net Carrying Amount | 477.5 |  | 477.5 |  | 532.8
Amortization of intangible assets | 20.8 | $ 21.4 | 62.1 | $ 64.2 |
Minimum [Member] |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Current Fiscal Year | 80.0 |  | 80.0 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 80.0 |  | 80.0 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 80.0 |  | 80.0 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 80.0 |  | 80.0 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | 80.0 |  | 80.0 |  |
Maximum [Member] |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Current Fiscal Year | 85.0 |  | 85.0 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 85.0 |  | 85.0 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 85.0 |  | 85.0 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 85.0 |  | 85.0 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | 85.0 |  | 85.0 |  |
Capitalized Computer Software, Intangible Asset [Member] |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 60.9 |  | 60.9 |  | 54.2
Finite-Lived Intangible Assets, Accumulated Amortization | (51.7) |  | (51.7) |  | (49.2)
Net Carrying Amount | 9.2 |  | 9.2 |  | 5.0
Customer Platforms - Intangible Assets [Member] |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 856.2 |  | 856.2 |  | 856.2
Finite-Lived Intangible Assets, Accumulated Amortization | (475.7) |  | (475.7) |  | (428.2)
Net Carrying Amount | 380.5 |  | 380.5 |  | 428.0
Customer Relationships - Intangible Assets [Member] |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 53.0 |  | 53.0 |  | 53.0
Finite-Lived Intangible Assets, Accumulated Amortization | (25.6) |  | (25.6) |  | (23.1)
Net Carrying Amount | 27.4 |  | 27.4 |  | 29.9
Technology-Based Intangible Assets [Member] |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 154.2 |  | 154.2 |  | 154.3
Finite-Lived Intangible Assets, Accumulated Amortization | (93.8) |  | (93.8) |  | (84.4)
Net Carrying Amount | $ 60.4 |  | $ 60.4 |  | $ 69.9

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