Recent Accounting Pronouncements (Details)	Dec. 31, 2011
New Accounting Pronouncements and Changes in Accounting Principles (Textual) [Abstract]
New guidance to perform a qualitative assessment on goodwill	50.00%

Minimum percentage of likelihood that fair value of goodwill more than carrying value.

No definition available.

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