Fair Value Measurements Fair Value Measurements - Changes in Level 3 Fair Value Measurements (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Convertible Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance as of beginning of period	$ 1,910	$ 1,600
Restructuring of CEOC and other	330	640
Balance as of end of period	2,240	2,240
PropCo Call Right [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance as of beginning of period	193	131
Restructuring of CEOC and other	(4)	58
Balance as of end of period	$ 189	$ 189