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Income Taxes - Other Tax Disclosure Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Contingency [Line Items] |  |  |  |
Unrecognized Tax Benefits | $ 41.1 | $ 38.7 | $ 47.7 | $ 28.2
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | 4.4 | 1.0 | 3.1 |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 11.5 | $ 6.9 | $ 7.5 | $ 2.5
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | $ 49.4 |  |  |

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