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Leases - Schedule of Cash Paid for Financing Obligation (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
GLPI Leases |  |
Lessee, Lease, Description [Line Items] |  |
Cash paid for principal | $ 0 | $ 0
Cash paid for interest | 109 | 93
VICI Leases |  |
Lessee, Lease, Description [Line Items] |  |
Cash paid for principal | 1 | 49
Cash paid for interest | $ 983 | $ 472

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- Definition Financing Obligation, Interest Payments + References No definition available. + Details
Name: | czr_FinancingObligationInterestPayments
Namespace Prefix: | czr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Financing Obligation, Principal Payments + References No definition available. + Details
Name: | czr_FinancingObligationPrincipalPayments
Namespace Prefix: | czr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Details
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=czr_GLPILeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=czr_VICILeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |