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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets: |  |
NOL and credit carryforwards | $ 142.0 | $ 145.7
Pension, other postretirement and postemployment benefits | 36.5 | 36.4
Payroll and compensation | 17.1 | 19.0
Legal, environmental and self-insurance accruals | 22.6 | 21.3
Working capital accruals | 13.9 | 11.5
Other | 7.9 | 7.1
Total deferred tax assets | 240.0 | 241.0
Valuation allowance | (92.0) | (93.6)
Net deferred tax assets | 148.0 | 147.4
Deferred tax liabilities: |  |
Intangible assets recorded in acquisitions | 74.9 | 75.1
Basis difference in affiliates | 16.3 | 14.0
Accelerated depreciation | 25.7 | 22.4
Deferred income | 29.4 | 23.0
Other | 4.2 | 1.6
Total deferred tax liabilities | 150.5 | 136.1
Total deferred tax liabilities | $ (2.5) |
Total deferred tax assets |  | $ 11.3

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- Definition The tax effects as of the balance sheet date of the amount of excesses of tax deductions over taxable income in a year which cannot be used on the tax returns in the current year but may be carried forward to reduce taxable income or income taxes payable in a future year in certain jurisdictions and the tax effects arising from all unused tax credits available to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset. + References No definition available. + Details
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- Definition The tax effect as of the balance sheet date of the amount of the estimated future tax effects arising from estimates of losses under legal, environmental and self-insurance, which can only be deducted for tax purposes when actual losses are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. + References No definition available. + Details
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