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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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Majority Shareholder [Member] \| Reimbursement to Counterparty [Member] \| Hamlet Holdings LLC [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 0	$ 0	$ 0	$ 6
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	1	1	1	2
Affiliated Entity [Member] \| CAC
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	12	7	21	13
Majority-Owned Subsidiary, Unconsolidated [Member] \| CEOC
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	2	7	6	14
Majority-Owned Subsidiary, Unconsolidated [Member] \| Shared Services Allocation to Related Party [Member] \| CEOC
Related Party Transaction [Line Items]
Shared services allocated expenses to CEOC	108	86	204	177
Majority-Owned Subsidiary, Unconsolidated [Member] \| Shared Services Allocation from Related Party [Member] \| CEOC
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	23	25	46	50
Majority-Owned Subsidiary, Unconsolidated [Member] \| Management Fees [Member] \| CEOC
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	11	12	22	22
Majority-Owned Subsidiary, Unconsolidated [Member] \| Lease Agreements [Member] \| CEOC
Related Party Transaction [Line Items]
Octavius Tower lease revenue	$ 9	$ 9	$ 18	$ 18