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Note 12 - Goodwill and Intangible Assets - Summary of Changes in Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Goodwill | $ 4,108.1 |  | $ 3,864.3
Acquisitions and purchases of controlling interests | 257.1 |  | 171.7
Purchase accounting reclassifications | (0.3) |  | (4.1)
Current period adjustment | 0.0 | [1] | 1.9
Foreign currency translation adjustment | (33.7) |  | 74.3
Goodwill | 4,331.2 |  | 4,108.1
Insurance [Member] |  |  |
Goodwill | 1,208.6 |  | 998.8
Acquisitions and purchases of controlling interests | 235.9 |  | 171.7
Purchase accounting reclassifications | (0.3) |  | 2.1
Current period adjustment | 15.8 | [1] | 21.4
Foreign currency translation adjustment | (5.2) |  | 14.6
Goodwill | 1,454.8 |  | 1,208.6
Energy and Specialized Markets [Member] |  |  |
Goodwill | 2,423.6 |  | 2,389.5
Acquisitions and purchases of controlling interests | 21.2 |  | 0.0
Purchase accounting reclassifications | 0.0 |  | (6.0)
Current period adjustment | (15.8) | [1] | (19.5)
Foreign currency translation adjustment | (28.0) |  | 59.6
Goodwill | 2,401.0 |  | 2,423.6
Financial Services [Member] |  |  |
Goodwill | 475.9 |  | 476.0
Acquisitions and purchases of controlling interests | 0.0 |  | 0.0
Purchase accounting reclassifications | 0.0 |  | (0.2)
Current period adjustment | 0.0 | [1] | 0.0
Foreign currency translation adjustment | (0.5) |  | 0.1
Goodwill | $ 475.4 |  | $ 475.9
[1] | This adjustment relates to a segment reclassification; refer to Note 19. Segment Reporting

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