Contractual Commitments Contractual Commitments (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Other Commitments [Line Items]
Self-Insurance Reserve	$ 201	$ 179
Deferred compensation liability	40	40
Trust for Benefit of Employees [Member]
Other Commitments [Line Items]
Assets Held-in-trust	67	62
CEOC | Escrow for Benefit of Employees [Member]
Other Commitments [Line Items]
Assets Held-in-trust	61	57
CEOC | Escrow for Benefit of Employees [Member] | Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits [Member]
Other Commitments [Line Items]
Other Unrecorded Amounts	$ 34	$ 32