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Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred Tax Assets |  |
Receivable allowances | $ 1.3 | $ 1.2
Postretirement and other employee benefits | 10.9 | 12.3
Net operating loss and tax credit carryforwards | 305.5 | 163.2
Capital loss carryforward | 47.4 | 106.5
Accruals and other liabilities | 0.8 | 0.3
Investment in subsidiaries | 0.1 | 8.9
Capitalized research & development | 36.8 | 29.8
Section 163(j) Interest Limitation | 9.9 | 12.4
Right Of Use Liabilities | 14.7 | 10.0
Other | 15.0 | 6.9
Deferred Tax Assets | 442.4 | 351.5
Less: Valuation allowance | (323.0) | (225.5)
Net deferred income tax assets | 119.4 | 126.0
Deferred Tax Liabilities |  |
Net property, plant and equipment | (89.2) | (109.1)
Intangibles | (136.7) | (104.1)
Derivatives | (9.0) | (16.9)
Right Of Use Assets | (15.1) | (9.7)
Other | (5.3) | (3.9)
Net deferred income tax liabilities | (255.3) | (243.7)
Total net deferred income tax liabilities | $ (135.9) | $ (117.7)

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