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Income Taxes - Reconciliation of Effective Income Tax Rate (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Percent and amount of pretax income |  |  |  |
Federal statutory rate |  | 21.00% | 21.00% | 35.00%
State and local income taxes, net of federal benefits |  | 9.90% | (6.20%) | 6.30%
Nondeductible expenses |  | 4.00% | 6.90% | (16.00%)
Goodwill impairment losses |  | 14.40% | 0.00% | (20.50%)
Compensation |  | 0.30% | (3.80%) | 29.50%
Contingent liability settlement |  | 0.00% | 0.00% | 22.90%
Foreign |  | 0.10% | (0.10%) | 11.30%
Valuation allowance |  | 0.00% | (20.30%) | 2962.30%
Tax Act - deferred rate change |  | 0.00% | 0.00% | (1043.50%)
Other |  | 0.20% | (1.50%) | 3.30%
Total effective tax rate and income tax benefit (expense) |  | 49.90% | (4.00%) | 1990.60%
Amount of pretax income |  |  |  |
Federal statutory rate |  | $ (18.1) | $ (18.9) | $ 8.8
State and local income taxes - net of federal benefits |  | (8.5) | 5.6 | 1.6
Nondeductible expenses |  | (3.5) | (6.2) | (4.0)
Goodwill impairment |  | (12.4) | 0.0 | (5.1)
Compensation |  | (0.3) | 3.4 | 7.4
Contingent liability settlement |  | 0.0 | 0.0 | 5.7
Foreign |  | (0.1) | 0.1 | 2.8
Valuation allowance | $ 22.4 | 0.0 | 18.3 | 741.9
Tax Act - deferred rate change |  | 0.0 | 0.0 | (261.3)
Other miscellaneous items |  | (0.1) | 1.3 | 0.7
Total income tax benefit (expense) |  | $ (43.0) | $ 3.6 | $ 498.5

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