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	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Convertible Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance as of beginning of period	$ 1,630	$ 1,600
Restructuring of CEOC and other	280	310
Balance as of end of period	1,910	1,910
PropCo Call Right [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance as of beginning of period	131	131
Restructuring of CEOC and other	62	62
Balance as of end of period	$ 193	$ 193