Segment Information - Equity in Earnings of Unconsolidated Investments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in income of unconsolidated investments	$ 4.9	$ 2.3	$ 13.5	$ 8.2
Casino Segment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in income of unconsolidated investments	4.8	2.3	13.6	7.7
Other Investments Segment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in income of unconsolidated investments	$ 0.1	$ 0.0	$ (0.1)	$ 0.5