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Intangible Assets Table (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | $ 1,119.8 |  | $ 1,119.8 |  | $ 1,123.9
Finite-Lived Intangible Assets, Accumulated Amortization | (724.3) |  | (724.3) |  | (667.2)
Net Carrying Amount | 395.5 |  | 395.5 |  | 456.7
Amortization of intangible assets | 20.4 | $ 20.8 | 61.4 | $ 62.1 |
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 |  |
Capitalized Computer Software, Intangible Asset [Member] |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 61.1 |  | 61.1 |  | 60.9
Finite-Lived Intangible Assets, Accumulated Amortization | (55.0) |  | (55.0) |  | (52.6)
Net Carrying Amount | 6.1 |  | 6.1 |  | 8.3
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 | (539.1) |  | (539.1) |  | (491.6)
Net Carrying Amount | 317.1 |  | 317.1 |  | 364.6
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 | (29.1) |  | (29.1) |  | (26.5)
Net Carrying Amount | 23.9 |  | 23.9 |  | 26.5
Technology-Based Intangible Assets [Member] |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 149.5 |  | 149.5 |  | 153.8
Finite-Lived Intangible Assets, Accumulated Amortization | (101.1) |  | (101.1) |  | (96.5)
Net Carrying Amount | $ 48.4 |  | $ 48.4 |  | $ 57.3

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