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Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Goodwill |  |  |
Goodwill | $ 4,908.7 | $ 4,945.5 | $ 4,894.4
Current year acquisitions/(dispositions) | (0.2) | 24.0 |
Foreign currency and other | (36.6) | 27.1 |
IAN |  |  |
Goodwill |  |  |
Goodwill | 4,231.6 | 4,264.5 | 4,218.1
Current year acquisitions/(dispositions) | (0.2) | 23.5 |
Foreign currency and other | (32.7) | 22.9 |
DXTRA |  |  |
Goodwill |  |  |
Goodwill | 677.1 | 681.0 | $ 676.3
Current year acquisitions/(dispositions) | 0.0 | 0.5 |
Foreign currency and other | $ (3.9) | $ 4.2 |

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