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Acquisitions Narrative (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Oct. 03, 2022
Number of businesses acquired | 1 | 0 | 4 |
Goodwill and intangible assets related to acquisitions |  |  | $ 28.0 |
Current year acquisitions/(dispositions) | $ 203.0 | $ (0.2) |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  | 83.90%
Interest income | 63.4 | 29.7 | $ 29.5 |
IAN |  |  |  |
Current year acquisitions/(dispositions) | 0.0 | (0.2) |  |
DXTRA |  |  |  |
Current year acquisitions/(dispositions) | 0.0 | 0.0 |  |
MD&E |  |  |  |
Current year acquisitions/(dispositions) | 209.5 | 0.0 |  |
IA&C |  |  |  |
Number of businesses acquired |  |  | 3 |
Current year acquisitions/(dispositions) | (6.5) | 0.0 |  |
SC&E |  |  |  |
Number of businesses acquired |  |  | 1 |
Current year acquisitions/(dispositions) | $ 0.0 | $ 0.0 |  |

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