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Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Deferred tax assets: |  |  |
Allowances and operating liabilities | $ 9 | $ 2 | $ 12
Net operating loss carryforwards | 13 | 1 | 1
Foreign tax credit carryforwards | 3 | 0 |
Book over tax depreciation |  |  | 2
Trade credit | 4 | 4 | 1
Allowance for doubtful accounts | 12 | 3 | 2
Inventory reserve | 11 | 9 | 11
Stock-based compensation | 19 | 12 | 5
Intangible assets | 56 |  |
Other | 1 | 3 | 2
Total deferred tax assets | 128 | 34 | 36
Deferred tax liabilities: |  |  |
Tax over book depreciation | (6) | (2) | (2)
Intangible assets |  | (18) | (14)
Total deferred tax liabilities | (6) | (20) | (16)
Net deferred tax assets before valuation allowance | 122 | 14 | 20
Valuation allowance | (129) |  |
Net deferred tax assets |  | $ 14 | $ 20
Net deferred tax (liability) | $ (7) |  |

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