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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Tax Credit Carryforward [Line Items] |  |  |  |
Effective income tax rate | 7.90% | (30.20%) |  |
Unrealized foreign tax credits | $ 404 |  |  |
Non-current deferred tax assets reclassified to non-current deferred tax liabilities | 86 | $ 130 |  |
Unrecognized tax benefit | 78 | 46 | $ 115 | $ 127
Total uncertain tax position identified in foreign jurisdiction |  | 69 |  |
Reduction in unrecognized tax position completion of audits in foreign jurisdictions | 21 | 75 |  |
Decrease in unrecognized tax benefits is reasonably possible | 15 |  |  |
Income tax interest and penalties related to unrecognized tax benefit | 10 | 1 | $ 1 |
Accrued income tax interest and penalties related to unrecognized tax benefit | 15 | 5 |  |
Foreign tax credit | 404 |  |  |
Net operating loss carry forward | 699 |  |  |
Tax-deductible goodwill | 175 |  |  |
Undistributed earnings of foreign subsidiaries | $ 5,673 |  |  |
Maximum [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Period of amortization of goodwill | 15 years |  |  |
Accounting Standards Update 2015-17 [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Current deferred tax assets reclassified to non-current deferred tax liabilities |  | 376 |  |
Non-current deferred tax assets reclassified to non-current deferred tax liabilities |  | 358 |  |
Current deferred tax liabilities reclassified to non-current deferred tax liabilities |  | $ 291 |  |
Carry Forward Expiration Year 2020 [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Net operating loss carry forward | $ 11 |  |  |
Carry Forward Expiration Year 2022 [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Net operating loss carry forward | 141 |  |  |
Carry Forward Expiration Year 2026 [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Net operating loss carry forward | $ 252 |  |  |

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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 + Details
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