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Note 12 - Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Goodwill [Table Text Block] |
|  | Insurance |  |  | Energy and specialized markets |  |  | Financial services |  |  | Total |
Goodwill at December 31, 2018 |  | $ | 833.8 |  |  | $ | 2,054.7 |  |  | $ | 473.0 |  |  | $ | 3,361.5 |
Acquisitions |  |  | 161.0 |  |  |  | 288.5 |  |  |  | 4.0 |  |  |  | 453.5 |
Businesses held for sale and disposition |  |  | (7.9 | ) |  |  | — |  |  |  | (0.7 | ) |  |  | (8.6 | )
Purchase accounting reclassifications |  |  | (1.4 | ) |  |  | — |  |  |  | (0.1 | ) |  |  | (1.5 | )
Foreign currency translation adjustment |  |  | 13.3 |  |  |  | 46.3 |  |  |  | (0.2 | ) |  |  | 59.4 |
Goodwill at December 31, 2019 |  |  | 998.8 |  |  |  | 2,389.5 |  |  |  | 476.0 |  |  |  | 3,864.3 |
Acquisitions |  |  | 171.7 |  |  |  | — |  |  |  | — |  |  |  | 171.7 |
Purchase accounting reclassifications |  |  | 2.1 |  |  |  | (6.0 | ) |  |  | (0.2 | ) |  |  | (4.1 | )
Current period adjustment (1) |  |  | 21.4 |  |  |  | (19.5 | ) |  |  | — |  |  |  | 1.9 |
Foreign currency translation adjustment |  |  | 14.6 |  |  |  | 59.6 |  |  |  | 0.1 |  |  |  | 74.3 |
Goodwill at December 31, 2020 |  | $ | 1,208.6 |  |  | $ | 2,423.6 |  |  | $ | 475.9 |  |  | $ | 4,108.1 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | Weighted |  |  |  |  |  |  |  |  |  |  |  |
|  | Average |  |  |  |  |  |  |  |  |  |  |  |
|  | Useful Life |  |  |  |  |  | Accumulated |  |  |  |  |
|  | (in years) |  | Cost |  |  | Amortization |  |  | Net |
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Technology-based |  | 7 |  | $ | 559.6 |  |  |  | (349.5 | ) |  | $ | 210.1 |
Marketing-related |  | 16 |  |  | 275.2 |  |  |  | (113.4 | ) |  | $ | 161.8 |
Contract-based |  | 6 |  |  | 5.0 |  |  |  | (5.0 | ) |  | $ | — |
Customer-related |  | 13 |  |  | 1,004.3 |  |  |  | (354.2 | ) |  | $ | 650.1 |
Database-based |  | 19 |  |  | 501.0 |  |  |  | (138.2 | ) |  | $ | 362.8 |
Total intangible assets |  |  |  | $ | 2,345.1 |  |  | $ | (960.3 | ) |  | $ | 1,384.8 |
December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Technology-based |  | 7 |  | $ | 519.2 |  |  | $ | (291.9 | ) |  | $ | 227.3 |
Marketing-related |  | 16 |  |  | 265.3 |  |  |  | (94.3 | ) |  |  | 171.0 |
Contract-based |  | 6 |  |  | 5.0 |  |  |  | (5.0 | ) |  |  | — |
Customer-related |  | 13 |  |  | 901.2 |  |  |  | (278.0 | ) |  |  | 623.2 |
Database-based |  | 19 |  |  | 484.6 |  |  |  | (107.2 | ) |  |  | 377.4 |
Total intangible assets |  |  |  | $ | 2,175.3 |  |  | $ | (776.4 | ) |  | $ | 1,398.9 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Years Ending |  | Amount |
2021 |  | $ | 169.9 |
2022 |  |  | 156.9 |
2023 |  |  | 144.3 |
2024 |  |  | 139.4 |
2025 |  |  | 114.7 |
2026 and thereafter |  |  | 659.6 |
Total |  | $ | 1,384.8 |

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