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Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Deferred tax assets: |  |  |
Allowances and operating liabilities | $ 5 | $ 8 | $ 8
Net operating loss carryforwards | 56 | 56 | 52
Foreign tax credit carryforwards | 7 | 8 | 29
Allowance for doubtful accounts | 2 | 6 | 6
Inventory reserve | 9 | 10 | 12
Stock-based compensation | 8 | 8 | 15
Intangible assets | 28 | 24 | 27
Assets held-for-sale | 4 |  |
Investment in subsidiaries | 9 |  |
Book over tax depreciation | 4 | 2 |
Other | 4 | 3 | 3
Total deferred tax assets | 136 | 125 | 152
Deferred tax liabilities: |  |  |
Net deferred tax assets before valuation allowance | 136 | 125 | 152
Valuation allowance | (138) | (129) | (157)
Net deferred tax liabilities | $ (2) | $ (4) | $ (5)

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