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Business and Summary of Significant Accounting Policies and Estimates - Inventories (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Jun. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Accounting Policies [Abstract] |  |  |  |  |  |  |  |
Impairment of inventory | $ 11.9 | $ 4.0 | $ 2.0 | $ 0.6 | $ 5.8 | $ 16.0 | $ 6.1 | $ 5.0

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