Basis of Presentation & Consolidation - Additional Information (Details) $ in Millions	3 Months Ended								8 Months Ended	12 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Aug. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) reportable_segment	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Variable Interest Entity [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 2,115	$ 2,185	$ 2,119	$ 1,972	$ 1,901	$ 993	$ 1,008	$ 966		$ 8,391	$ 4,868	$ 3,877
Number of Reportable Segments | reportable_segment										3
Net income/(loss) attributable to Caesars	198	$ 110	$ 29	$ (34)	2,004	$ (433)	$ (1,432)	$ (507)		$ 303	(368)	(3,049)
Total assets	25,775				25,436					25,775	25,436
Total liabilities	22,437				22,139					22,437	22,139
Long-term Debt	$ 8,965				8,913					8,965	8,913
Gain on deconsolidation of subsidiaries										0	31	0
Horseshoe Casino Baltimore [Member]
Variable Interest Entity [Line Items]
Net revenues									$ 190
Net income/(loss) attributable to Caesars									(7)
CBIC, LLC [Member]
Variable Interest Entity [Line Items]
Equity Method Investments, Fair Value Disclosure					$ 28						28
Gain on deconsolidation of subsidiaries											31
Horseshoe Casino Baltimore [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Total assets									350
Total liabilities									356
Long-term Debt									$ 294
Product and Service, Other [Member]
Variable Interest Entity [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										789	584	497
Net revenues										$ 161	$ 179	$ 178