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Income Tax - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Tax loss carryforwards and investment credits | $ 827 | $ 908
Less unrecognized tax benefit | (180) | (238)
Tax loss carryforward net of unrecognized tax benefit | 647 | 670
Inventory valuation | 22 | 15
Impairment and restructuring charges | 15 | 16
Fixed asset depreciation in arrears | 44 | 39
Capitalized development costs | 80 | 63
Receivables for government funding | 5 | 13
Tax credits granted on past capital investments | 1,156 | 1,147
Pension service costs | 73 | 82
Stock awards |  | 5
Commercial accruals | 21 | 15
Other temporary differences | 86 | 78
Total deferred tax assets | 2,149 | 2,143
Valuation allowances | (1,585) | (1,607)
Deferred tax assets, net | 564 | 536
Accelerated fixed asset depreciation | (16) | (26)
Acquired intangible assets | (11) | (11)
Advances of government funding | (16) | (23)
Other temporary differences | (8) | (3)
Deferred tax liabilities | (51) | (63)
Net deferred income tax asset | $ 513 | $ 473

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- Definition Amount of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Liability -URI http://asc.fasb.org/extlink&oid=6510232 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph b(2) -Article 7 + Details
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