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Related Party Transactions Related Party Transactions Table (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 06, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party		$ 0	$ 3	$ 2
Hamlet Holdings LLC [Member] \| Majority Shareholder [Member] \| Reimbursement to Counterparty [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 34	0	34	6
Horseshoe Casino Baltimore [Member] \| Equity Method Investee [Member] \| Reimbursement to Counterparty [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party		5	16	0
Horseshoe Casino Baltimore [Member] \| Equity Method Investee [Member] \| Management Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party		10	3	0
CEOC LLC [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party		0	9	14
CEOC LLC [Member] \| Affiliated Entity [Member] \| Management Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party		0	33	45
CEOC LLC [Member] \| Affiliated Entity [Member] \| Shared Services Allocation to Related Party [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction		0	312	368
CEOC LLC [Member] \| Affiliated Entity [Member] \| Shared Services Allocation from Related Party [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party		0	71	148
CEOC LLC [Member] \| Affiliated Entity [Member] \| Lease Agreements [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties		$ 0	$ 26	$ 35