Subsequent Events (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended
Jun. 30, 2012 Terminal
Subsequent Events (Additional Textual) [Abstract]
Additional Compensation Expense Attributable to Incremental Fair Value	$ 16
Awards granted	3
Recognized non-cash charge	63
Minimum planned investment for development	$ 300
Number of existing video lottery terminal licenses	3,750
2012 Plan [Member]
Subsequent Events (Textual) [Abstract]
Stock appreciation and options rights granted to individual	3,433,509
2012 Plan [Member] \| Stock Appreciation Rights (SARs) [Member]
Subsequent Events (Textual) [Abstract]
Stock appreciation and options rights granted to individual	6,500,000

Additional compensation expense attributable to incremental fair value.

No definition available.

Name:	czr_AdditionalCompensationExpenseAttributableToIncrementalFairValue
Namespace Prefix:	czr_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Impact on incremental expense recognize a non cash charge over the vesting period.

+ References

No definition available.

+ Details

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

- Definition

Minimum planned investment for development.

+ References

No definition available.

+ Details

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

- Definition

Number of existing video lottery terminal licenses.

+ References

No definition available.

+ Details

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

- Definition

Share based compensation arrangement by share based payment award granted.

+ References

No definition available.

+ Details

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

- Details

Name:	czr_SubsequentEventsAdditionalTextualAbstract
Namespace Prefix:	czr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	czr_SubsequentEventsTextualAbstract
Namespace Prefix:	czr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant