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.

No definition available.

+ Details

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

- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=czr_CRCRevolvingCreditFacilityMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=czr_CRCTermLoanMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Debt - Summary of Debt and Revolving Credit Facility Cash Flows from Financing Activities (Details) - USD ($) $ in Millions		12 Months Ended
	Sep. 13, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Repayments		$ (414)	$ (1,130)	$ (7,846)
Debt issuance and extension costs and fees		(28)
CEC Convertible Notes
Debt Instrument [Line Items]
Repayments		0
Debt issuance and extension costs and fees		(28)
CRC Revolving Credit Facility
Debt Instrument [Line Items]
Repayments		(100)
Debt issuance and extension costs and fees		0
CRC Term Loan
Debt Instrument [Line Items]
Repayments		(47)
Debt issuance and extension costs and fees		0
CEOC LLC Term Loan
Debt Instrument [Line Items]
Repayments	$ (250)	(265)
Debt issuance and extension costs and fees		0
Other debt activity
Debt Instrument [Line Items]
Repayments		(2)
Debt issuance and extension costs and fees		$ 0