Significant Accounting Policies - Revenue Recognition and Complimentaries (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue from External Customer [Line Items]
Total complimentaries associated with gaming contracts	$ 115.0	$ 42.7	$ 329.8	$ 111.8
Food and beverage
Revenue from External Customer [Line Items]
Total complimentaries associated with gaming contracts	66.7	30.5	195.3	77.3
Hotel
Revenue from External Customer [Line Items]
Total complimentaries associated with gaming contracts	44.1	10.5	121.5	30.8
Other
Revenue from External Customer [Line Items]
Total complimentaries associated with gaming contracts	$ 4.2	$ 1.7	$ 13.0	$ 3.7