Description of Business Description of Business - Additional Information (Details) $ in Millions		1 Months Ended	3 Months Ended		12 Months Ended
		Apr. 30, 2017 USD ($)	Mar. 31, 2017 USD ($) reportable_segment Casinos	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Number of Reportable Segments | reportable_segment			2
Business Combination, Contingent Consideration Arrangements, Description			CEC and CAC entered into the Amended and Restated Agreement and Plan of Merger, dated as of July 9, 2016, as amended by the First Amendment to Amended and Restated Agreement and Plan of Merger, dated as of February 20, 2017 (as amended, the “Merger Agreement”). Pursuant to the Merger Agreement, among other things, CAC will merge with and into CEC, with CEC as the surviving company (the “Merger”). Subject to the terms and conditions of the Merger Agreement, upon consummation of the Merger, each share of CAC common stock issued and outstanding immediately prior to the effective date of the Merger will be converted into, and become exchangeable for, that number of shares of CEC common stock equal to 1.625 (the “Exchange Ratio”).
Long-term Debt, Gross			$ 6,894
Restructuring of CEOC and other			(463)	$ (237)
Accrued restructuring and support expenses			$ 7,033		$ 6,601
Substantial Doubt about Going Concern, Conditions or Events			As a result of the following circumstances, we have substantial doubt about CEC’s ability to continue as a going concern: we have limited unrestricted cash available to meet the financial commitments of CEC, primarily resulting from significant expenditures made to (1) defend against the litigation matters disclosed below and (2) support a plan of reorganization for CEOC (the “Restructuring”); we have made material future commitments to support the Restructuring described below; and we are a defendant in litigation relating to certain CEOC transactions dating back to 2010 and other legal matters (see Note 3) that could result in one or more adverse rulings against us if the Restructuring is not completed. CEC does not currently have sufficient cash to meet its financial commitments to support the Restructuring that are due when CEOC ultimately emerges from bankruptcy or to satisfy the potential obligations that would arise in the event of an adverse ruling on one or all of the litigation matters disclosed below. The completion of the Merger is expected to allow CEC to fulfill its financial commitments in support of the Restructuring. However, if the Merger is not completed for any reason, CEC would still be liable for many of these obligations. In addition, although under the terms of the Restructuring, all related litigation is expected to be resolved, there remain the outstanding litigation matters that are currently stayed pending CEOC’s emergence from bankruptcy.
Recorded Unconditional Purchase Obligation			$ 200
Long-term Purchase Commitment, Amount			700
Contractual Obligation, Due in Next Fiscal Year	[1]		526
Contractual Obligation, Excluding Latest Fiscal Year			8,800
Cash and cash equivalents			1,454		1,513
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member]
Issuance of CEC common stock			2,367		1,936
Common Stock Subject to Mandatory Redemption [Member]
Recorded Unconditional Purchase Obligation			1,000
Caesars Entertainment Operating Company [Member]
Restructuring of CEOC and other			466
Accrued restructuring and support expenses			7,033		6,601
Notes Payable, Related Parties, Current			$ 35		35
Other Commitments, Description			The following represents other commitments or potential obligations to which CEC has agreed as part of the Third Amended Plan and certain of the RSAs, none of which have been accrued as of March 31, 2017. Purchase 100% of OpCo common stock for $700 million Issuance of CEC common stock in exchange for OpCo preferred stock PropCo has right of first refusal on the real property assets associated with all new domestic non-Las Vegas gaming facility opportunities, with CEC or OpCo leasing such properties Guarantee of OpCo’s payment obligations to PropCo under the leases of the CEOC Properties Guarantee of OpCo debt received by the First Lien Bank Lenders and First Lien Noteholders
Caesars Entertainment Operating Company [Member] | Convertible Debt [Member]
Debt Instrument, Face Amount			$ 1,100
Caesars Entertainment Operating Company [Member] | Bank Guaranty Settlement [Member]
Accrued restructuring and support expenses			738		734
Caesars Entertainment Operating Company [Member] | Other Restructuring [Member]
Payments for Restructuring			34		34
Caesars Entertainment Operating Company [Member] | Report of Bankruptcy Examiner [Member] | Minimum [Member]
Loss Contingency, Estimate of Possible Loss			3,600
Caesars Entertainment Operating Company [Member] | Report of Bankruptcy Examiner [Member] | Maximum [Member]
Loss Contingency, Estimate of Possible Loss			5,100
Subsequent Event [Member]
Subsequent Event, Description		an anticipated $1.8 billion to $2.2 billion of commercial mortgage backed securities at PropCo led by JP Morgan Securities LLC and Barclays Capital Inc. (the process for which is underway)
Social and Mobile Games [Member]
Payments of Distributions to Affiliates					$ 235
Proceeds from Contributions from Affiliates			$ 129
UNITED STATES
Number Of Casinos Operated Or Managed | Casinos			12
UNITED STATES | LAS VEGAS, NEVADA | Geographic Concentration Risk [Member]
Number Of Casinos Operated Or Managed | Casinos			8
UNITED STATES | LAS VEGAS, NEVADA | Geographic Concentration Risk [Member] | Sales Revenue, Net [Member]
Concentration Risk, Percentage			67.00%
CERP
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest			100.00%
Long-term Debt, Gross			$ 4,570
Contractual Obligation, Due in Next Fiscal Year	[1]		360
Cash and cash equivalents			224
OpCo [Member] | Subsequent Event [Member]
Long-term Debt, Gross		$ 1,200
Parent [Member]
Cash and cash equivalents			115
Parent [Member] | Affiliated Entity [Member]
Cash and cash equivalents			$ 109

[1] Debt principal payments are estimated amounts based on maturity dates and potential borrowings under our revolving credit facility. Interest payments are estimated based on the forward-looking LIBOR curve. Actual payments may differ from these estimates.