Casino Promotional Allowance Retail Value (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Promotional Allowances	$ 133	$ 276	$ 289	$ 559
Food and Beverage [Member]
Promotional Allowances	69	152	140	308
Rooms [Member]
Promotional Allowances	57	102	114	206
Other Promotional Allowances [Member]
Promotional Allowances	$ 7	$ 22	$ 35	$ 45