Disposal Group Proposed Merger Agreement Additional Termination Fee

No definition available.

Name:	czr_DisposalGroupProposedMergerAgreementAdditionalTerminationFee
Namespace Prefix:	czr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Disposal Group Proposed Merger Agreement Stock Conversion Price Cash Per Share

+ References

No definition available.

+ Details

Name:	czr_DisposalGroupProposedMergerAgreementStockConversionPriceCashPerShare
Namespace Prefix:	czr_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Disposal Group Proposed Merger Agreement Stock Conversion Rate

+ References

No definition available.

+ Details

Name:	czr_DisposalGroupProposedMergerAgreementStockConversionRate
Namespace Prefix:	czr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Disposal Group Proposed Merger Agreement Termination Fee

+ References

No definition available.

+ Details

Name:	czr_DisposalGroupProposedMergerAgreementTerminationFee
Namespace Prefix:	czr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Disposal Group Proposed Merger Post Merger Ownership Percentage

+ References

No definition available.

+ Details

Name:	czr_DisposalGroupProposedMergerPostMergerOwnershipPercentage
Namespace Prefix:	czr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Liquidity Period

+ References

No definition available.

+ Details

Name:	czr_LiquidityPeriod
Namespace Prefix:	czr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of casinos operated as of balance sheet date or managed.

+ References

No definition available.

+ Details

Name:	czr_NumberOfCasinosOperatedOrManaged
Namespace Prefix:	czr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Restructuring and Related Cost, Expected Number of Positions Furloughed

+ References

No definition available.

+ Details

Name:	czr_RestructuringandRelatedCostExpectedNumberofPositionsFurloughed
Namespace Prefix:	czr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Unusual or Infrequent Item, or Both, Loss, Gross, Estimated Future Daily Loss

+ References

No definition available.

+ Details

Name:	czr_UnusualorInfrequentItemorBothLossGrossEstimatedFutureDailyLoss
Namespace Prefix:	czr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

+ Details

Name:	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LinesOfCreditCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=czr_EldoradoResortsInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=czr_CaesarsEntertainmentIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	czr_DisposalgroupconsiderationreceivedAxis=czr_CashpershareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	czr_DisposalgroupconsiderationreceivedAxis=czr_AdditionalpotentialcashpershareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	czr_DisposalgroupconsiderationreceivedAxis=czr_AcquirorstockpershareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=czr_CaesarsEntertainmentIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_GeographicConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_EntityByLocationAxis=stpr_NV
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=us-gaap_NonUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=czr_SharesHeldInEscrowMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Description of Business (Details) $ / shares in Units, $ in Millions			1 Months Ended	3 Months Ended
	May 06, 2020 shares	Jun. 24, 2019 USD ($) $ / shares shares	May 11, 2020 USD ($)	Mar. 31, 2020 USD ($) casino $ / shares	Apr. 02, 2020
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Number of casinos operated or managed \| casino				51
Liquidity Period				12 months
Eldorado Resorts, Inc. \| Caesars Entertainment, Inc.
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Shares of Caesars common stock (in shares) \| shares		682,161,838
Disposal group proposed merger post merger ownership percentage		49.80%
Merger agreement termination fee \| $		$ 836.8
Eldorado Resorts, Inc. \| Caesars Entertainment, Inc. \| Cash per share
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Disposal group proposed merger agreement stock conversion price cash per share \| $ / shares		$ 8.40
Eldorado Resorts, Inc. \| Caesars Entertainment, Inc. \| Additional potential cash per share
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Disposal group proposed merger agreement stock conversion price cash per share \| $ / shares		$ 0.003333
Eldorado Resorts, Inc. \| Caesars Entertainment, Inc. \| Acquiror stock per share
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Disposal group proposed merger agreement stock conversion price cash per share \| $ / shares				$ 8.42
Disposal group proposed merger agreement stock conversion price		0.0899
Eldorado Resorts, Inc. \| Caesars Entertainment, Inc. \| Common Stock
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Shares of Caesars common stock (in shares) \| shares		77,000,000
Caesars Entertainment, Inc. \| Caesars Entertainment, Inc.
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Merger agreement termination fee paid by caesars \| $		$ 418.4
United States
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Number of casinos operated or managed \| casino				49
Geographic concentration risk \| United States
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Number of casinos operated or managed \| casino				13
Geographic concentration risk \| United States \| Las Vegas
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Number of casinos operated or managed \| casino				9
Geographic concentration risk \| International
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Number of casinos operated or managed \| casino				5
Geographic concentration risk \| Revenue benchmark \| United States \| Las Vegas
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Concentration risk, percentage				45.00%
Subsequent Event
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Expected number of positions furloughed					90.00%
Subsequent Event \| Eldorado Resorts, Inc. \| Caesars Entertainment, Inc. \| Shares Held In Escrow
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Shares of Caesars common stock (in shares) \| shares	8,327,528
Minimum \| Subsequent Event
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Unusual or infrequent item, daily loss \| $			$ 9.0
Maximum \| Subsequent Event
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Unusual or infrequent item, daily loss \| $			$ 9.5
Revolving Credit Facility
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Line of credit, current \| $				$ 826.0