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Related Party Transactions - Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 9	$ 1	$ 18	$ 2
Affiliated Entity [Member] \| CEOC LLC [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	3	0	9
Affiliated Entity [Member] \| CEOC LLC [Member] \| Shared Services Allocation to Related Party [Member]
Related Party Transaction [Line Items]
Shared services allocated expenses to CEOC	0	108	0	312
Affiliated Entity [Member] \| CEOC LLC [Member] \| Shared Services Allocation from Related Party [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	25	0	71
Affiliated Entity [Member] \| CEOC LLC [Member] \| Management Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	11	0	33
Affiliated Entity [Member] \| CEOC LLC [Member] \| Lease Agreements [Member]
Related Party Transaction [Line Items]
Octavius Tower lease revenue	0	8	0	26
Equity Method Investee [Member] \| Horseshoe Casino Baltimore [Member] \| Reimbursement to Counterparty [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	1	4	4	4
Equity Method Investee [Member] \| Horseshoe Casino Baltimore [Member] \| Management Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 2	$ 1	$ 7	$ 1