Goodwill and Other Intangible Assets - Carrying Value and Accumulated Amortization for Each Major Class of Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 06, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	14 years 9 months 18 days
Gross Carrying Amount		$ 1,131	$ 1,076
Accumulated Amortization		(789)	(721)
Net Carrying Amount		342	355	$ 285
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non amortizing intangible assets		2,635	1,254	148
Total intangible assets other than goodwill		2,977	1,609	$ 433
Trademarks
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non amortizing intangible assets		790	790
Gaming rights
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non amortizing intangible assets		1,592	211
Caesars Rewards
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non amortizing intangible assets		$ 253	253
Trade names and trademarks
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)		2 years 3 months 18 days
Gross Carrying Amount		$ 14	0
Accumulated Amortization		(3)	0
Net Carrying Amount		$ 11	0
Customer relationships
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)		4 years 6 months
Gross Carrying Amount		$ 1,071	1,030
Accumulated Amortization		(756)	(693)
Net Carrying Amount		$ 315	337
Contract rights
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)		6 years
Gross Carrying Amount		$ 3	3
Accumulated Amortization		(2)	(2)
Net Carrying Amount		$ 1	1
Gaming rights
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)		5 years 6 months
Gross Carrying Amount		$ 43	43
Accumulated Amortization		(28)	(26)
Net Carrying Amount		$ 15	$ 17