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Stock-Based Compensation (PBRSU Weighted Average Assumptions) (Details) (PBRSU [Member])
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
PBRSU [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= clgx_PbrsuMember		 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= clgx_PbrsuMember
Risk-free interest rate 0.93%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= clgx_PbrsuMember		 [1] 0.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= clgx_PbrsuMember		 [1]
Expected volatility 24.01%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= clgx_PbrsuMember		 [2] 27.87%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= clgx_PbrsuMember		 [2]
Share-based Compensation Arrangement, Fair Value, Average Shareholder Return 8.37%clgx_ShareBasedCompensationArrangementFairValueAverageShareholderReturn
/ us-gaap_AwardTypeAxis
= clgx_PbrsuMember		 [2] 0.84%clgx_ShareBasedCompensationArrangementFairValueAverageShareholderReturn
/ us-gaap_AwardTypeAxis
= clgx_PbrsuMember		 [2]
[1] The risk-free interest rate for the periods within the contractual term of the PBRSUs is based on the U.S. Treasury yield curve in effect at the time of the grant.
[2] The expected volatility and average total shareholder return is a measure of the amount by which a stock price has fluctuated or is expected to fluctuate based primarily on our and our peers' historical data.