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Stock-Based Compensation Stock-Based Compensation - CIE Valuation Assumptions (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 52.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 57.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 55.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 5 years 6 months 3 years 9 months 4 years 11 months
Risk-free interest rate 1.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 1.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 0.90%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Caesars Interactive Entertainment [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember		 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember		 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
Caesars Interactive Entertainment [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 46.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 49.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 59.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 2 years 5 months 2 years 4 months 4 years 2 months
Risk-free interest rate 0.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 0.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 0.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Caesars Interactive Entertainment [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 56.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 58.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 61.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 7 years 1 month 7 years 3 months 7 years 1 month
Risk-free interest rate 2.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 2.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 1.20%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ dei_LegalEntityAxis
= czr_CaesarsInteractiveEntertainmentMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember