Goodwill and Other Intangible Assets - Carrying Value and Accumulated Amortization for Each Major Class of Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,131	$ 1,131
Accumulated Amortization	(807)	(789)
Net Carrying Amount	324	342
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non-amortizing intangible assets	2,637	2,635
Total intangible assets other than goodwill	2,961	2,977
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	1,594	1,592
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)	1 year 9 months 18 days
Gross Carrying Amount	$ 14	14
Accumulated Amortization	(4)	(3)
Net Carrying Amount	$ 10	11
Customer relationships
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	4 years 2 months 12 days
Gross Carrying Amount	$ 1,071	1,071
Accumulated Amortization	(772)	(756)
Net Carrying Amount	$ 299	315
Contract rights
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	5 years 9 months 18 days
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 3 months 18 days
Gross Carrying Amount	$ 43	43
Accumulated Amortization	(29)	(28)
Net Carrying Amount	$ 14	$ 15