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Income Tax Matters - Schedule of Provision for Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Income Tax Disclosure [Abstract] |  |  |  |
Domestic | $ 1.0 | $ 6.8 | $ 10.6 | $ 16.3
Foreign | 0.3 | 0.5 | 0.3 | 0.8
Total | $ 1.3 | $ 7.3 | $ 10.9 | $ 17.1

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