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Stock-Based Compensation - CIE Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
CIE Stock Option Activity, Shares        
Granted 0      
Caesars Interactive Entertainment [Member]        
CIE Stock Option Activity, Shares        
Outstanding as of December 31, 2015 0 21,057    
Granted   377 10,350 1,135
Exercised   (909) (1,984) (3,822)
Forfeited   (248)    
Outstanding as of December 31, 2016   0 21,057  
Weighted Average Exercise Price [Abstract]        
Weighted Average Exercise Price Outstanding, Beginning of Period $ 0.00 $ 9,584.64    
Weighted Average Exercise Price per Share (1)   19,166.18 $ 15,352.49 $ 9,976.43
Weighted Average Exercise Price Exercised   2,456.64    
Weighted Average Exercise Price Forfeited   11,723.63    
Weighted Average Exercise Price Outstanding, End of Period   $ 0.00 $ 9,584.64  
Weighted Average Remaining Contractual Term [Abstract]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term   0 years 7 years 10 months  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value   $ 0    
Caesars Interactive Entertainment [Member] | Discontinued Operations, Disposed of by Sale [Member] | Social and Mobile Games [Member]        
CIE Stock Option Activity, Shares        
Forfeited   (20,277)    
Weighted Average Exercise Price [Abstract]        
Weighted Average Exercise Price Forfeited   $ 10,056.24