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Income Tax Matters, Reconciliation Between Income Tax Provision and Statutory Income Tax Provision Table (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Reconciliation between income tax provision and statutory income tax provision: |  |  |
Amount of federal income tax provision based on the statutory rate | $ (25.2) | $ (46.5) | $ (51.5)
Decrease (increase) in federal valuation allowances | 1.7 | 0.5 | (0.3)
Non-deductible compensation (expense) benefit | (0.6) | (2.3) | 0.3
Non-deductible expense | (1.5) | 0.0 | (0.3)
State income taxes, net of federal benefit | (2.5) | (4.3) | (4.2)
Foreign income tax (expense) benefit | (0.5) | (0.1) | 0.5
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount | 0.4 | (5.9) | 0.0
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount | 0.1 | 29.0 | 0.0
Income tax provision | (28.3) | (87.6) | (55.5)
State and Local Jurisdiction [Member] |  |  |
Reconciliation between income tax provision and statutory income tax provision: |  |  |
Decrease (increase) in federal valuation allowances | 2.9 | 2.2 | (0.3)
State and tax expense (benefit) before adjustments | 4.5 | 4.0 | 4.1
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ (0.9) | $ (2.5) | $ 0.2

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