Debt - Schedule of Debt (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total	$ 9,785
Book Value	9,669	$ 8,542
Current portion of long-term debt	(876)	(64)
Long-term debt, face value	8,909
Long-term debt, book value	8,793	8,478
Unamortized premiums, discounts and deferred finance charges	116	123
Fair value	$ 8,074
Unsecured debt \| CEC Convertible Notes
Debt Instrument [Line Items]
Rates	5.00%
Total	$ 1,085
Book Value	1,058	1,058
CRC \| Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Total	975
Book Value	$ 975	0
CRC \| Revolving Credit Facility \| Revolving Credit Facility \| London Interbank Offered Rate
Debt Instrument [Line Items]
London interbank offered rate	2.00%
CRC \| Term Loan \| Term Loan
Debt Instrument [Line Items]
Total	$ 4,595
Book Value	$ 4,534	4,541
CRC \| Term Loan \| Term Loan \| London Interbank Offered Rate
Debt Instrument [Line Items]
London interbank offered rate	2.75%
CRC \| Unsecured debt \| Term Loan
Debt Instrument [Line Items]
Rates	5.25%
Total	$ 1,700
Book Value	$ 1,672	1,672
CRC \| Unsecured debt \| Special Improvement District Bonds
Debt Instrument [Line Items]
Rates	4.30%
Total	$ 53
Book Value	53	53
CEOC LLC \| Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Total	161
Book Value	$ 161	0
CEOC LLC \| Revolving Credit Facility \| Revolving Credit Facility \| London Interbank Offered Rate
Debt Instrument [Line Items]
London interbank offered rate	1.88%
CEOC LLC \| Term Loan \| Term Loan
Debt Instrument [Line Items]
Total	$ 1,216
Book Value	$ 1,216	$ 1,218

Long term debt non current face value.

No definition available.

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

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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-Subparagraph (b)(1)
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Period Type:	instant

- 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

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- Definition

Amount, after accumulated amortization, of debt discount.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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