Quarterly Results of Operations - Unaudited (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
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
Income from operations	100	232	282	125	154	84	149	150	739	537	226
Net income/(loss)	198	111	29	(34)	2,004	(439)	(1,432)	(508)	304	(375)	(3,078)
Net income/(loss) attributable to Caesars	$ 198	$ 110	$ 29	$ (34)	$ 2,004	$ (433)	$ (1,432)	$ (507)	$ 303	$ (368)	$ (3,049)
Basic earnings/(loss) per share	$ 0.29	$ 0.16	$ 0.04	$ (0.05)	$ 3.01	$ (2.90)	$ (9.62)	$ (3.44)	$ 0.44	$ (1.32)	$ (20.85)
Diluted earnings/(loss) per share	$ 0.25	$ 0.14	$ 0.04	$ (0.05)	$ 2.48	$ (2.90)	$ (9.62)	$ (3.44)	$ 0.41	$ (1.32)	$ (20.85)