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Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Deferred Tax Assets: |  |  |  |
Loss carryforwards | $ 128.6 | $ 139.8 |  |
Asbestos | 116.7 | 101.5 |  |
Employee benefits | 64.7 | 59.4 |  |
Accruals | 59.3 | 46.0 |  |
Credit carryforwards | 3.4 | 2.5 |  |
Other | 27.0 | 20.5 |  |
Gross deferred tax assets | 399.7 | 369.7 |  |
Less: Valuation allowance | 123.0 | 129.8 | $ 141.0 | $ 170.0
Net deferred tax assets | 276.7 | 239.9 |  |
Deferred Tax Liabilities: |  |  |  |
Intangibles | (40.9) | (43.0) |  |
Undistributed earnings | (49.2) | (33.8) |  |
Accelerated depreciation | (30.3) | (26.9) |  |
Investment | 0.5 | (0.2) |  |
Total deferred tax liabilities | (119.9) | (103.9) |  |
Net deferred tax assets | $ 156.8 | $ 136.0 |  |

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