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Income Taxes - Significant Components of Deferred Tax Assets and Liability (Detail) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets: |  |
Allowances and operating liabilities | $ 395 | $ 293
Net operating loss carryforwards | 270 | 182
Stock Compensation | 69 | 66
Tax credit carryforwards | 702 | 768
Other | 60 | 59
Valuation allowance | (1,175) | (955)
Total deferred tax assets | 321 | 413
Deferred tax liabilities: |  |
Tax over book depreciation | 115 | 139
Capital leases | 86 |
Intangible assets | 110 | 688
Deferred income | 65 | 70
Accrued tax on unremitted earnings | 33 | 17
Other | 52 | 52
Total deferred tax liabilities | 461 | 966
Net deferred tax liability | $ 140 | $ 553

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