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Fair Value Measurements - Additional Details (Details)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Oct. 06, 2017
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
shares
interest_rate_swap_agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term Debt, Gross   $ 9,034
Derivative, Notional Amount   $ 1,000
Payments for Restructuring $ 3,487  
Number of Interest Rate Derivatives Held | interest_rate_swap_agreements   4
Loss Contingency, Estimate of Possible Loss $ 260  
Value loss amount, interest rate   8.50%
Call Option [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Inputs, Price Earnings Ratio Multiple   167.00%
Fair Value Assumption, Expected EBITDAR Volatility   25.00%
Fair Value Inputs, Revenue Multiple   0.12
Fair Value Inputs, Cap Rate   1200.00%
Fair Value Inputs, Comparability Adjustments   0.00%
Fair Value Inputs, Long-term Revenue Growth Rate   1.70%
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent   23.80%
Convertible Debt [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value Assumptions, Expected Term   7 years
Fair Value Inputs, Discount Rate   5.00%
CEC Convertible Notes, Convertible Number of Shares | shares   156
Debt Instrument, Interest Rate, Stated Percentage   4.75%
Fair Value Assumptions, Expected Volatility Rate   30.00%
Fair Value Assumptions, Risk Free Interest Rate   2.30%
Convertible Debt [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
CEC Convertible Notes, Convertible Number of Shares | shares   156
Convertible Debt [Member] | Unsecured Debt [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Instrument, Face Amount   $ 1,100
Debt Instrument, Interest Rate, Stated Percentage [1]   5.00%
Long-term Debt, Gross   $ 1,078
Caesars Entertainment Operating Company [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Payments for Restructuring Shares | shares 146  
Payments for Restructuring Prenegotiated Price Per Share | $ / shares $ 6.86  
Payments for Restructuring $ 2,787  
Obligations [Member] | Caesars Entertainment Operating Company [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Payments for Restructuring $ 1,000  
[1] (1) Interest rate is fixed, except where noted.