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Organization - Schedule of VIEs (Detail) (Consolidated VIEs [Member]) | 12 Months Ended
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Dec. 31, 2014
Beijing Autohome Information Technology Co., Ltd. [Member] |
Variable Interest Entity [Line Items] |
Date of incorporation or acquisition | Aug. 28, 2006
Place of incorporation | PRC
Percentage of direct ownership by the Company | 0.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = athm_BeijingAutohomeInformationTechnologyCompanyLimitedMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Principal activities | Provision of online advertising and dealer subscription services
Beijing Shengtuo Autohome Advertising Co., Ltd. [Member] |
Variable Interest Entity [Line Items] |
Date of incorporation or acquisition | Sep. 21, 2010
Place of incorporation | PRC
Percentage of direct ownership by the Company | 0.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = athm_BeijingShengtuoAutohomeAdvertisingCompanyLimitedMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Principal activities | Provision of online advertising services
Beijing Shengtuo Hongyuan Information Technology Co., Ltd. [Member] |
Variable Interest Entity [Line Items] |
Date of incorporation or acquisition | Nov. 08, 2010
Place of incorporation | PRC
Percentage of direct ownership by the Company | 0.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = athm_BeijingShengtuoHongyuanInformationTechnologyCompanyLimitedMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Principal activities | Provision of online advertising and dealer subscription services
Beijing Shengtuo Chengshi Advertising Co., Ltd. [Member] |
Variable Interest Entity [Line Items] |
Date of incorporation or acquisition | Nov. 12, 2010
Place of incorporation | PRC
Percentage of direct ownership by the Company | 0.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = athm_BeijingShengtuoChengshiAdvertisingCompanyLimitedMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Principal activities | Provision of online advertising services
Shanghai Youche Youjia Advertising Co., Ltd. [Member] |
Variable Interest Entity [Line Items] |
Date of incorporation or acquisition | Dec. 31, 2011
Place of incorporation | PRC
Percentage of direct ownership by the Company | 0.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = athm_ShanghaiYoucheYoujiaAdvertisingCompanyLimitedMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Principal activities | Provision of online advertising services
Guangzhou Youche Youjia Advertising Co., Ltd. [Member] |
Variable Interest Entity [Line Items] |
Date of incorporation or acquisition | May 08, 2012
Place of incorporation | PRC
Percentage of direct ownership by the Company | 0.00%us-gaap_VariableInterestEntityOwnershipPercentage / dei_LegalEntityAxis = athm_GuangzhouYoucheYoujiaAdvertisingCompanyLimitedMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Principal activities | Provision of online advertising services

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- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28200181&loc=SL6759159-111685 + Details
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