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Acquisitions and Divestitures - Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Business Acquisition [Line Items] |  |  |  |  |  |
Proceeds from sale of business, net of divested cash |  |  |  | $ 268.4 | $ 0.0 |
Provision for income taxes |  | $ 25.4 | $ 21.5 | 49.0 | $ 55.5 |
Acquisitions |  |  |  |  |  |
Goodwill | $ 848.2 | 848.2 |  | 848.2 |  | $ 843.7
Universal Weather and Aviation, Inc. |  |  |  |  |  |
Acquisitions |  |  |  |  |  |
Goodwill | 79.1 | 79.1 |  | 79.1 |  |
Goodwill, expected to be tax deductible | 70.2 | 70.2 |  | 70.2 |  |
Identifiable intangible assets acquired |  |  |  | 44.3 |  |
Disposal Group, Not Discontinued Operations | Multi Service Payment Solutions |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Proceeds from sale of business, net of divested cash |  |  |  | 303.5 |  |
Proceeds from divestiture of businesses, net of cash divested |  |  |  | 268.4 |  |
Deferred future payment from sale of business | 75.0 | 75.0 |  | 75.0 |  |
Deferred future payment from sale of business, portion based on future business performance | 50.0 | $ 50.0 |  | 50.0 |  |
Gain (loss) on sale of investments | $ 80.0 |  |  |  |  |
Provision for income taxes |  |  |  | $ 16.1 |  |

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