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Business Combinations - Net Asset Acquired (Details) - USD ($) $ in Millions | 6 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2020 | Sep. 30, 2020 | Dec. 31, 2019 | Jul. 01, 2019
Net assets acquired: |  |  |  |
Goodwill |  | $ 817.6 | $ 811.4 |
Adjustments |  |  |  |
Goodwill |  | $ 0.4 |  |
AXC |  |  |  |
Net assets acquired: |  |  |  |
Identifiable intangible assets | $ 256.4 |  | 256.4 | $ 256.4
Goodwill | 287.9 |  | 287.5 |
Property, plant and equipment | 34.2 |  | 34.2 |
Other assets | 53.1 |  | 53.1 |
Liabilities | (31.9) |  | (31.5) |
Net assets acquired | 599.7 |  | $ 599.7 |
Adjustments |  |  |  |
Goodwill | 0.4 |  |  |
Liabilities | (0.4) |  |  |
Net assets acquired | $ 0.0 |  |  |

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