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Goodwill and Intangible Assets - Government Grants (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Finite-Lived Intangible Assets |  |
Gross carrying amount | $ 551.6 | $ 333.1
Government grants |  |
Finite-Lived Intangible Assets |  |
Gross carrying amount | 7.7 | 8.2
Government grants | Current |  |
Finite-Lived Intangible Assets |  |
Gross carrying amount | 0.5 | 0.5
Government grants | Long-term |  |
Finite-Lived Intangible Assets |  |
Gross carrying amount | $ 7.2 | $ 7.7

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