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Acquisitions, Investments, Dispositions and Divestitures - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 0 Months Ended 1 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Nov. 02, 2012
Harrahs St. Louis [Member]
Mar. 31, 2013
Harrahs St. Louis [Member]
Sep. 30, 2012
Bubbler Media [Member]
Caesars Interactive Entertainment [Member]
Mar. 31, 2013
Buffalo Studios, LLC [Member]
Caesars Interactive Entertainment [Member]
Dec. 31, 2012
Buffalo Studios, LLC [Member]
Caesars Interactive Entertainment [Member]
Mar. 31, 2013
Alea Leeds Casino [Member]
Mar. 31, 2013
Non-cancellable Contract Costs [Member]
Alea Leeds Casino [Member]
Mar. 31, 2013
Employment Related Costs [Member]
Alea Leeds Casino [Member]
Mar. 31, 2013
Other Business Exit Costs [Member]
Alea Leeds Casino [Member]
Mar. 31, 2013
Fair Value, Measurements, Nonrecurring [Member]
Buffalo Studios, LLC [Member]
Caesars Interactive Entertainment [Member]
Mar. 31, 2013
Assets Held-for-sale [Member]
Fair Value, Measurements, Nonrecurring [Member]
Macau [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                          
Consideration given         $ 7.5   $ 45.2            
Fair value of earnout payment           58.0 5.6         58.0  
Acquisition and integration costs 64.2 0.1       52.4              
Assets acquired             52.9            
Liabilities assumed             7.7            
Gain on sale of discontinued operations     9.3                    
Adjustment to gain on sale of discontinued operations       0.7                  
Write-down of tangible and intangible assets 20.0 174.0           5.7         21.0
Exit costs               $ 15.8 $ 15.1 $ 0.5 $ 0.2