XML 36 R57.htm IDEA: XBRL DOCUMENT v2.4.1.9
Organization and Principal Activities (Narrative) (Details) (VIEs and VIEs' Subsidiaries [Member], USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
VIEs and VIEs' Subsidiaries [Member]
      
Variable Interest Entity [Line Items]      
Amount payable by the VIEs and their subsidiaries to WOFEs related to the service fees $ 3.3qihu_AmountPayableByViesAndViesSubsidiariesToWofesRelatedToServiceFees
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember		 $ 0.1qihu_AmountPayableByViesAndViesSubsidiariesToWofesRelatedToServiceFees
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember		 $ 2.3qihu_AmountPayableByViesAndViesSubsidiariesToWofesRelatedToServiceFees
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Percentage of consolidated revenues VIEs contribute 76.90%qihu_PercentageOfConsolidatedRevenuesViesContribute
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember		 78.60%qihu_PercentageOfConsolidatedRevenuesViesContribute
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember		 92.10%qihu_PercentageOfConsolidatedRevenuesViesContribute
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Percentage of consolidated total assets VIEs accounted for 28.70%qihu_PercentageOfConsolidatedTotalAssetsViesAccountedFor
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember		 20.30%qihu_PercentageOfConsolidatedTotalAssetsViesAccountedFor
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember		  
Percentage of consolidated total liabilities VIEs accounted for 17.20%qihu_PercentageOfConsolidatedTotalLiabilitiesViesAccountedFor
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember		 17.20%qihu_PercentageOfConsolidatedTotalLiabilitiesViesAccountedFor
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember		  
Percentage of Group's employees hired by VIEs and their subsidiaries 51.20%qihu_PercentageOfGroupsEmployeesHiredByViesAndTheirSubsidiaries
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember