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Income Taxes - Additional Information (Detail) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 USD ($) | Dec. 31, 2013 CNY | Dec. 31, 2013 High And New Technology Enterprise | Dec. 31, 2013 High And New Technology Enterprise Expiration Period One | Dec. 31, 2013 High And New Technology Enterprise Expiration Period Two | Dec. 31, 2013 High And New Technology Enterprise Expiration Period Three | Dec. 31, 2013 Key Software Enterprise | Dec. 31, 2013 China | Dec. 31, 2013 China Maximum | Dec. 31, 2013 China Minimum | Dec. 31, 2013 Japan | Dec. 31, 2013 Japan Maximum | Dec. 31, 2013 Japan Minimum | Dec. 31, 2013 Baidu Japan JPY (¥) | Dec. 31, 2013 Baidu Online Key Software Enterprise
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unified statutory income tax rate under current EIT law | 25.00% | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Preferential enterprise income tax rate, effective period |  |  | 3 years |  |  |  | 2 years |  |  |  |  |  |  |  |
A preferential enterprise income tax rate |  |  | 15.00% |  |  |  | 10.00% |  |  |  |  |  |  |  |
Tax holiday, expiration date |  |  |  | Jan. 01, 2014 | Jan. 01, 2015 | Jan. 01, 2016 |  |  |  |  |  |  |  |  | Jan. 01, 2015
Statutory withholding tax rate to which dividends paid by a FIE to any of its foreign non-resident enterprise investors are subject | 10.00% | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Special withholding tax rate to which dividends paid by a FIE to its foreign non-resident enterprise investors of certain jurisdictions are subject | 5.00% | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum paid-in capital required for a specified Japan national income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 100.00 |
A specified Japan national income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 30.00% |
Operating loss carry forwards | 365.89 | 2,220.00 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning expiration date of net operating loss |  |  |  |  |  |  |  | Jan. 01, 2017 |  |  | Jan. 01, 2015 |  |  |  |
Accrued withholding tax |  | 580.72 |  |  |  |  |  |  |  |  |  |  |  |  |
Time period that tax authorities could conduct examinations of entity's tax filings |  |  |  |  |  |  |  |  | 5 years |  |  | 7 years |  |  |
Tax years remain open to examination by respective taxing jurisdictions |  |  |  |  |  |  |  |  | 2013 | 2009 |  | 2013 | 2007 |  |

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- Definition The amount of withholding tax in connection with the dividends paid, or to be paid, by a foreign-invested enterprise onshore in China to any of its foreign non-resident enterprise investors offshore. + References No definition available. + Details
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- Definition Income Tax Holiday, Expiration Date + References No definition available. + Details
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- Definition Minimum Paid in Capital Required for Specified National Income Tax Rate of Foreign Country + References No definition available. + Details
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- Definition A preferential enterprise income tax rate granted by relevant PRC tax authorities to qualified enterprises in China. + References No definition available. + Details
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- Definition The special withholding tax rate to which dividends paid by a foreign-invested enterprise onshore in China to any of its Hong Kong non-resident enterprise investors offshore are subject. These Hong Kong investors must meet the requirements stipulated by China's tax regulations. + References No definition available. + Details
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- Definition The statutory withholding tax rate to which dividends paid by a foreign-invested enterprise onshore China to any of its foreign non-resident enterprise investors offshore are subject. + References No definition available. + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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