Amount of transactions with related party during the financial reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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Related Party Transactions Related Party Transactions - Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 8	$ 1	$ 9	$ 1
Affiliated Entity [Member] \| CEOC LLC [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	2	0	6
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	204
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	23	0	46
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	22
Affiliated Entity [Member] \| CEOC LLC [Member] \| Lease Agreements [Member]
Related Party Transaction [Line Items]
Octavius Tower lease revenue	0	9	0	18
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	2	0	3	0
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	$ 0	$ 5	$ 0