Revenue Disaggregation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,545.8	$ 305.5	$ 2,820.7	$ 1,421.6
Gaming
Disaggregation of Revenue [Line Items]
Total revenues	1,305.5	259.2	2,387.5	1,162.1
Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	81.6	13.1	144.6	118.2
Hotel
Disaggregation of Revenue [Line Items]
Total revenues	57.7	9.1	101.5	69.7
Other
Disaggregation of Revenue [Line Items]
Total revenues	101.0	24.1	187.1	71.6
Operating Segments | Northeast
Disaggregation of Revenue [Line Items]
Total revenues	652.5	102.7	1,223.4	623.4
Operating Segments | Northeast | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	602.5	94.1	1,129.5	552.8
Operating Segments | Northeast | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	24.1	2.2	45.0	36.1
Operating Segments | Northeast | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	6.7	0.2	12.5	9.0
Operating Segments | Northeast | Other
Disaggregation of Revenue [Line Items]
Total revenues	19.2	6.2	36.4	25.5
Operating Segments | South
Disaggregation of Revenue [Line Items]
Total revenues	368.2	121.5	664.1	344.8
Operating Segments | South | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	304.4	103.7	549.8	272.3
Operating Segments | South | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	29.4	7.6	52.5	37.3
Operating Segments | South | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	24.1	6.8	43.7	24.6
Operating Segments | South | Other
Disaggregation of Revenue [Line Items]
Total revenues	10.3	3.4	18.1	10.6
Operating Segments | West
Disaggregation of Revenue [Line Items]
Total revenues	140.4	17.7	237.0	144.3
Operating Segments | West | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	96.7	12.8	165.8	84.7
Operating Segments | West | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	18.2	2.2	30.1	25.7
Operating Segments | West | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	19.9	1.5	32.4	27.3
Operating Segments | West | Other
Disaggregation of Revenue [Line Items]
Total revenues	5.6	1.2	8.7	6.6
Operating Segments | Midwest
Disaggregation of Revenue [Line Items]
Total revenues	294.8	36.0	529.5	264.1
Operating Segments | Midwest | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	272.1	33.5	489.0	229.7
Operating Segments | Midwest | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	9.7	1.0	16.7	18.8
Operating Segments | Midwest | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	7.0	0.6	12.9	8.8
Operating Segments | Midwest | Other
Disaggregation of Revenue [Line Items]
Total revenues	6.0	0.9	10.9	6.8
Other
Disaggregation of Revenue [Line Items]
Total revenues	97.7	27.6	185.6	47.9
Other | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	29.8	15.1	53.4	22.7
Other | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	0.2	0.1	0.3	0.3
Other | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Other | Other
Disaggregation of Revenue [Line Items]
Total revenues	67.7	12.4	131.9	24.9
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Total revenues	(7.8)	0.0	(18.9)	(2.9)
Intersegment Eliminations | Gaming
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	(0.1)
Intersegment Eliminations | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Intersegment Eliminations | Hotel
Disaggregation of Revenue [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Intersegment Eliminations | Other
Disaggregation of Revenue [Line Items]
Total revenues	$ (7.8)	$ 0.0	$ (18.9)	$ (2.8)