Revenue Disaggregation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 3,578.7	$ 5,301.4	$ 3,587.9
Gaming
Disaggregation of Revenue [Line Items]
Total revenues	3,051.1	4,268.7	2,894.9
Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	224.4	512.0	314.8
Hotel
Disaggregation of Revenue [Line Items]
Total revenues	146.8	311.0	163.6
Reimbursable management costs
Disaggregation of Revenue [Line Items]
Total revenues			57.3
Other
Disaggregation of Revenue [Line Items]
Total revenues	156.4	209.7	157.3
Operating segments | Northeast segment
Disaggregation of Revenue [Line Items]
Total revenues	1,639.3	2,399.9	1,891.5
Operating segments | Northeast segment | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	1,495.1	2,117.1	1,644.2
Operating segments | Northeast segment | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	68.9	155.1	109.6
Operating segments | Northeast segment | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	17.4	43.5	23.2
Operating segments | Northeast segment | Reimbursable management costs
Disaggregation of Revenue [Line Items]
Total revenues			46.8
Operating segments | Northeast segment | Other
Disaggregation of Revenue [Line Items]
Total revenues	57.9	84.2	67.7
Operating segments | South segment
Disaggregation of Revenue [Line Items]
Total revenues	849.6	1,118.9	394.4
Operating segments | South segment | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	684.0	831.1	302.9
Operating segments | South segment | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	76.9	154.1	56.6
Operating segments | South segment | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	64.3	98.2	23.3
Operating segments | South segment | Reimbursable management costs
Disaggregation of Revenue [Line Items]
Total revenues			0.0
Operating segments | South segment | Other
Disaggregation of Revenue [Line Items]
Total revenues	24.4	35.5	11.6
Operating segments | West segment
Disaggregation of Revenue [Line Items]
Total revenues	302.5	642.5	437.9
Operating segments | West segment | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	194.2	374.3	228.0
Operating segments | West segment | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	46.0	116.7	89.6
Operating segments | West segment | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	46.4	125.9	90.8
Operating segments | West segment | Reimbursable management costs
Disaggregation of Revenue [Line Items]
Total revenues			10.5
Operating segments | West segment | Other
Disaggregation of Revenue [Line Items]
Total revenues	15.9	25.6	19.0
Operating segments | Midwest segment
Disaggregation of Revenue [Line Items]
Total revenues	681.4	1,094.5	823.7
Operating segments | Midwest segment | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	615.2	938.1	719.8
Operating segments | Midwest segment | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	32.0	84.7	57.9
Operating segments | Midwest segment | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	18.7	43.4	26.3
Operating segments | Midwest segment | Reimbursable management costs
Disaggregation of Revenue [Line Items]
Total revenues			0.0
Operating segments | Midwest segment | Other
Disaggregation of Revenue [Line Items]
Total revenues	15.5	28.3	19.7
Other
Disaggregation of Revenue [Line Items]
Total revenues	125.0	47.5	40.4
Other | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	62.7	8.8	0.0
Other | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	0.6	1.4	1.1
Other | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0
Other | Reimbursable management costs
Disaggregation of Revenue [Line Items]
Total revenues			0.0
Other | Other
Disaggregation of Revenue [Line Items]
Total revenues	61.7	37.3	$ 39.3
Intersegment eliminations
Disaggregation of Revenue [Line Items]
Total revenues	(19.1)	(1.9)
Intersegment eliminations | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	(0.1)	(0.7)
Intersegment eliminations | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0
Intersegment eliminations | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0
Intersegment eliminations | Other
Disaggregation of Revenue [Line Items]
Total revenues	$ (19.0)	$ (1.2)