Summary of Significant Accounting Policies - Revenue Recognition, Gaming Taxes and Advertising Costs (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Complimentary Revenues, Food and Beverage	$ 94.7	$ 58.1	$ 55.8
Complimentary Revenues, Lodging	49.3	28.1	27.4
Complimentary Revenues, Other	13.4	9.6	8.4
Complimentary revenues	157.4	95.8	91.6
Promotional allowance costs	111.2	72.4	69.7
Gaming taxes	378.6	261.8	247.7
Advertising costs	$ 20.9	$ 22.1	$ 17.1