Fair Value Measurements - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended	9 Months Ended
	Oct. 06, 2017	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stock Repurchased During Period, Value				$ 625
Common Stock [Member] | Subsequent Event [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stock Repurchased During Period, Shares	146
Stock Repurchased During Period, Value	$ 1,000
Sale of Stock, Price Per Share	$ 6.86
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		$ 28	$ 28		$ 47
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | PropCo Call Right [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Description of Objectives, Methodology, and Limitations			Since the key assumptions used in the valuation model are significant unobservable inputs, the fair value for the call right is classified as Level 3. Should these assumptions fluctuate over time, it could result in an increase or decrease in the fair value of the call right and the corresponding restructuring accrual. Specifically, an increase in the volatility assumptions would result in an increase in the restructuring accrual.
Ratio of EBITDAR to Initial Rent Under Property Lease		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		2.40%
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent		24.10%
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Convertible Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Face Amount		$ 1,100	$ 1,100
Fair Value Assumptions, Expected Term			7 years
Fair Value Inputs, Discount Rate		5.00%
Conversion of Stock, Convertible Shares			156
Debt Instrument, Interest Rate, Stated Percentage		5.00%	5.00%
Fair Value Assumptions, Expected Volatility Rate			32.00%
Fair Value Assumptions, Risk Free Interest Rate			2.20%
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Description of Objectives, Methodology, and Limitations			Since the key assumptions used in the valuation model, including CEC’s estimated incremental post-emergence cost of borrowing and the expected volatility of CEC’s equity, are significant unobservable inputs, the fair value for the CEC convertible notes is classified as Level 3. Should CEC’s estimated incremental cost of borrowing or equity value fluctuate over time, it could result in an increase or decrease in the fair value of the notes and the corresponding restructuring accrual. Specifically, a decrease in the incremental borrowing rate or an increase in the expected volatility of CEC’s common stock would result in an increase in the restructuring accrual.