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Restructuring - Narrative (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) employee | Jun. 30, 2020 employee | Mar. 31, 2020 employee | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges | $ 2.3 |  |  | $ 0.0 | $ 27.0 | $ 0.0 |
Number of positions eliminated | employee | 100 | 550 | 90 |  |  |  |
Restructuring reserve | $ 20.1 |  |  |  | 20.1 |  | $ 4.5
Other Current Liabilities |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring reserve | 18.9 |  |  |  | 18.9 |  |
Other Noncurrent Liabilities |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring reserve | $ 1.2 |  |  |  | $ 1.2 |  |

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