Casino Promotional Allowances Casino Promotional Allowance Estimated Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Cost of Promotional Allowances	$ 67	$ 183	$ 198	$ 519
Food and Beverage
Cost of Promotional Allowances	42	119	125	347
Rooms
Cost of Promotional Allowances	21	45	61	126
Other
Cost of Promotional Allowances	$ 4	$ 19	$ 12	$ 46