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Organization, Consolidation and Presentation of Financial Statements - Additional Information (Detail)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2015
CNY (¥)
Variable Interest Entity [Line Items]    
Net liabilities of VIEs $ 175,970 ¥ 1,140,000
Creditors of the VIEs'third-party liabilities with no recourse to the general credit of the primary beneficiaries No  
Exchange rate used for conversion of financial statements from RMB to US dollar 6.4778 6.4778
Beijing Perusal    
Variable Interest Entity [Line Items]    
Interest-free loans provided by a subsidiary of the entity to the shareholders of its variable interest entities   ¥ 1,260,000
Equity pledge agreement expiration period 2 years  
Baidu Pay    
Variable Interest Entity [Line Items]    
Interest-free loans provided by a subsidiary of the entity to the shareholders of its variable interest entities   90,000
Equity pledge agreement expiration period 2 years  
Baidu Netcom    
Variable Interest Entity [Line Items]    
Interest-free loans provided by a subsidiary of the entity to the shareholders of its variable interest entities   ¥ 890,000
Equity pledge agreement expiration period 2 years