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Unaudited Interim Condensed Consolidated Statements Of Comprehensive Income (Parenthetical) (Class A Ordinary Shares) | 9 Months Ended
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Sep. 30, 2012 | Sep. 30, 2011
Class A Ordinary Shares |  |
Number of American depositary shares ("ADSs") representing one Class A ordinary share | 10 | 10

X
- Definition The number of American depositary shares ("ADSs") representing one share. + References No definition available. + Details
Name: | bidu_AmericanDepositorySharesToSharesRatio
Namespace Prefix: | bidu_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration