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Casino Promotional Allowances Casino Promotional Allowances (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Promotional Allowances $ 1,138us-gaap_PromotionalAllowances $ 1,107us-gaap_PromotionalAllowances $ 1,169us-gaap_PromotionalAllowances
Cost of Promotional Allowances 691czr_CostOfPromotionalAllowances 639czr_CostOfPromotionalAllowances 658czr_CostOfPromotionalAllowances
Food and Beverage [Member]      
Promotional Allowances 622us-gaap_PromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_FoodAndBeverageMember		 589us-gaap_PromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_FoodAndBeverageMember		 608us-gaap_PromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_FoodAndBeverageMember
Cost of Promotional Allowances 463czr_CostOfPromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_FoodAndBeverageMember		 428czr_CostOfPromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_FoodAndBeverageMember		 439czr_CostOfPromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_FoodAndBeverageMember
Rooms [Member]      
Promotional Allowances 422us-gaap_PromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_RoomsMember		 427us-gaap_PromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_RoomsMember		 446us-gaap_PromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_RoomsMember
Cost of Promotional Allowances 168czr_CostOfPromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_RoomsMember		 165czr_CostOfPromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_RoomsMember		 172czr_CostOfPromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_RoomsMember
Other Promotional Allowances [Member]      
Promotional Allowances 94us-gaap_PromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_OtherPromotionalAllowancesMember		 91us-gaap_PromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_OtherPromotionalAllowancesMember		 115us-gaap_PromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_OtherPromotionalAllowancesMember
Cost of Promotional Allowances $ 60czr_CostOfPromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_OtherPromotionalAllowancesMember		 $ 46czr_CostOfPromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_OtherPromotionalAllowancesMember		 $ 47czr_CostOfPromotionalAllowances
/ czr_PromotionalAllowanceAxis
= czr_OtherPromotionalAllowancesMember