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Income Taxes - Components of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Income Tax Disclosure [Abstract] |  |
Accruals not yet deductible for tax purposes | $ 17.4 | $ 17.5
Net operating loss carryforwards | 245.9 | 265.5
Foreign, federal and state credits | 8.4 | 10.4
Employee benefit items | 79.5 | 77.0
Capitalized expenses | 32.2 | 8.9
Intangibles | 21.8 | 0.0
Derivatives and other | 47.7 | 38.0
Sub-total deferred tax assets | 452.9 | 417.3
Valuation allowance | (197.6) | (218.4)
Total deferred tax assets | 255.3 | 198.9
Depreciation and amortization | (37.0) | (26.8)
Unremitted foreign earnings | (10.0) | 0.0
Intangible assets | 0.0 | (21.7)
Other | (0.4) | (0.4)
Total deferred tax liabilities | (47.4) | (48.9)
Net deferred tax assets | $ 207.9 | $ 150.0

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