Casino Promotional Allowances Casino Promotional Allowance - Retail Cost (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Cost of Promotional Allowances	$ 182.6	$ 161.0	$ 519.1	$ 471.2
Food and Beverage [Member]
Cost of Promotional Allowances	118.6	107.0	346.9	316.0
Rooms [Member]
Cost of Promotional Allowances	44.8	40.9	125.6	121.8
Other Promotional Allowances [Member]
Cost of Promotional Allowances	$ 19.2	$ 13.1	$ 46.6	$ 33.4